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GFB
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UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 4:00 pm

Watching this one online. #2 shut down and reporting issues lowering flaps. Looping west of MSY and may be getting ready to make a single engine, no flap approach.
 
GFB
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 4:08 pm

Now on the ground. It made two circles west of the airport. Unsure if they were able to get the flaps down. Approach looked to be near 160 knots.
Last edited by GFB on Sat Feb 20, 2021 4:26 pm, edited 1 time in total.
 
Cubsrule
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 4:16 pm

Is MSY’s FIS staffed on Saturday mornings? If so, this shouldn’t be terribly disruptive to passengers.

UA is apparently sending a 73G to pick up the pax. I’m surprised the flight is empty enough for that to work but maybe there were a lot of folks connecting to MSY.
 
Cubsrule
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 4:18 pm

Here’s the rescue flight: https://flightaware.com/live/flight/N13750
 
GFB
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 4:23 pm

Cubsrule wrote:
Here’s the rescue flight: https://flightaware.com/live/flight/N13750


They must have had that one scheduled today to head to IAH and then rerouted to MSY. It left INT shortly after the flight diverted.
 
Scarebus34
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 4:59 pm

[photoid][/photoid]
Cubsrule wrote:
Is MSY’s FIS staffed on Saturday mornings? If so, this shouldn’t be terribly disruptive to passengers.

UA is apparently sending a 73G to pick up the pax. I’m surprised the flight is empty enough for that to work but maybe there were a lot of folks connecting to MSY.

It’s only a 40 seat difference. And a FIS isn’t necessarily required - if not available CBP may allow the plane swap without clearing the passengers. Has happened before. However, CBP is available in MSY this morning so shouldn't be a problem.
Last edited by Scarebus34 on Sat Feb 20, 2021 5:06 pm, edited 1 time in total.
 
Tokyo777
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 5:03 pm

Looking at the flight data on FlightAware, it appears if it was an engine issue, it happened not long after reaching cruise altitude. Got to FL380, stayed for 8 minutes, then dropped down to FL240. If the engine was shut down at that point, then one must ask why didn't they turn around and go back to CUN (~30 minutes away) instead of crossing the Gulf and diverting to MSY (~90 minutes away)?
 
GFB
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 5:19 pm

Interesing tidbit. This plane diverted to CUN two days ago, and this appears to be its first flight since. https://flightaware.com/live/flight/N77538
 
Cubsrule
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 5:22 pm

GFB wrote:
Interesing tidbit. This plane diverted to CUN two days ago, and this appears to be its first flight since. https://flightaware.com/live/flight/N77538


That’s a pretty rapid descent on the prior diversion. The descent rate may or may not be related to the nature of the problem, though, because CUN is the last possible diversion point for a while (before traversing the Gulf).
 
GFB
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 5:24 pm

Tokyo777 wrote:
Looking at the flight data on FlightAware, it appears if it was an engine issue, it happened not long after reaching cruise altitude. Got to FL380, stayed for 8 minutes, then dropped down to FL240. If the engine was shut down at that point, then one must ask why didn't they turn around and go back to CUN (~30 minutes away) instead of crossing the Gulf and diverting to MSY (~90 minutes away)?


Good question. It looks like they kept their heading toward IAH until about 1/2 way across the gulf before making the turn to MSY. The shut down happened before this.
 
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Citrus1492
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 5:31 pm

Tokyo777 wrote:
Looking at the flight data on FlightAware, it appears if it was an engine issue, it happened not long after reaching cruise altitude. Got to FL380, stayed for 8 minutes, then dropped down to FL240. If the engine was shut down at that point, then one must ask why didn't they turn around and go back to CUN (~30 minutes away) instead of crossing the Gulf and diverting to MSY (~90 minutes away)?


They used the single engine etops procedure. Jk

From 380 it would have taken the same amount of time to return to CUN, maybe.
 
kalvado
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 5:53 pm

GFB wrote:
Tokyo777 wrote:
Looking at the flight data on FlightAware, it appears if it was an engine issue, it happened not long after reaching cruise altitude. Got to FL380, stayed for 8 minutes, then dropped down to FL240. If the engine was shut down at that point, then one must ask why didn't they turn around and go back to CUN (~30 minutes away) instead of crossing the Gulf and diverting to MSY (~90 minutes away)?


Good question. It looks like they kept their heading toward IAH until about 1/2 way across the gulf before making the turn to MSY. The shut down happened before this.

Maybe pressurization issue first, which they thought would not develop into something bigger?
 
FlyHossD
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 7:25 pm

The right or #2 engine has the engine driven hydraulic pump for the flaps and leading edge devices on the 737s. So maybe the two circles west of the airport were to complete the flap extension to 15 degrees prior to completing the approach. The backup electric pump supplies the same pressure (3,000 PSI), but far less volume, so the flaps and slats are much slower to extend in that case.
 
FlyHossD
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 7:29 pm

kalvado wrote:
GFB wrote:
Tokyo777 wrote:
Looking at the flight data on FlightAware, it appears if it was an engine issue, it happened not long after reaching cruise altitude. Got to FL380, stayed for 8 minutes, then dropped down to FL240. If the engine was shut down at that point, then one must ask why didn't they turn around and go back to CUN (~30 minutes away) instead of crossing the Gulf and diverting to MSY (~90 minutes away)?


Good question. It looks like they kept their heading toward IAH until about 1/2 way across the gulf before making the turn to MSY. The shut down happened before this.

Maybe pressurization issue first, which they thought would not develop into something bigger?


For dispatch with a PAC inop, FL250 is the max altitude, IIRC. So perhaps this issue - whatever it was - started with a PAC problem and the crew elected to descend to FL240 as a conservative move.

The regulations require landing at the nearest suitable airport in point of time in the event of an engine failure (do we know that the #2 engine was, in fact, shut down?). In other words, it's not strictly a distance issue. But if the CUN weather was good and the engine failed just after reaching cruise altitude, the flight would have likely returned to CUN. So I suspect the engine shut down occurred later.



JMHO, of course. And kudos to the crew for completing the flight safely.
 
jayunited
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 9:01 pm

The first diversion someone eluded to on February 18th into CUN was do to a hydraulic leak in the B system. I'll let an aircraft mechanic explain what the B system is and what it controls I don't know that is all the report state. Captain was not comfortable with continuing RTB-IAH flight decided to put her down in CUN they swapped aircraft in CUN and continued on to IAH.

The aircraft remained on the ground for maintenance until today when maintenance called the aircraft ready. However enroute CUN-IAH the number 2 engine was shut down in flight the preliminary report does not mention anything about the flaps they are still gathering all the information a final report should be out by tomorrow morning at the latest.

The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.
 
GFB
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 9:17 pm

jayunited wrote:
The first diversion someone eluded to on February 18th into CUN was do to a hydraulic leak in the B system. I'll let an aircraft mechanic explain what the B system is and what it controls I don't know that is all the report state. Captain was not comfortable with continuing RTB-IAH flight decided to put her down in CUN they swapped aircraft in CUN and continued on to IAH.

The aircraft remained on the ground for maintenance until today when maintenance called the aircraft ready. However enroute CUN-IAH the number 2 engine was shut down in flight the preliminary report does not mention anything about the flaps they are still gathering all the information a final report should be out by tomorrow morning at the latest.

The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.


Thanks for the detailed info. The pilots called for vectors West of the field due to the flaps, but I never heard if they were able to lower them.
 
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LAX772LR
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 11:27 pm

GFB wrote:

Odd that it would say "arrived E11" at MSY...

....MSY doesn't have an E-concourse, in either terminal. Only its concourses C (old terminal) or A (new terminal) could accept foreign arrivals anyway.

I'm guessing this was their intended gate for IAH, and the website is just glitching?
 
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CALTECH
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 11:51 pm

"SYSTEM B
Powered by Engine 2 hydraulic pump and an electric pump powered by IDG 1. It supplies power to :
- Primary flight controls (Aileron, Elevator & Feel, Rudder)
- Engine 2 thrust reverser
- Autopilot B
- Autoslats, Leading edge flaps and slats
- Trailing edge dlaps
- Two flight spoilers on each wing
- Normal brakes
- Alternate Nose Wheel Steering
- Landing Gear Transfer Unit
- Yaw Damper

LOSS OF SYSTEM B
With the loss of system B the following systems are inoperative :
- Autopilot B
- 2 Flight spoilers on each wing
- Yaw damper
- Normal leading edge and trailing edge flaps
Considerations :
- Single autopilot = CAT III not available
- Plan an alternate flap extention
- Performance : plan a flaps 15 landing, leading edge devices can not be retracted"
 
AC4500
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sat Feb 20, 2021 11:53 pm

LAX772LR wrote:
GFB wrote:

Odd that it would say "arrived E11" at MSY...

....MSY doesn't have an E-concourse, in either terminal. Only its concourses C (old terminal) or A (new terminal) could accept foreign arrivals anyway.

I'm guessing this was their intended gate for IAH, and the website is just glitching?

flightaware doesn't ever update the arrival gate if a flight diverts. So yes, E11 was the intended arrival gate at IAH.
 
gdavis003
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 12:04 am

LAX772LR wrote:
GFB wrote:

Odd that it would say "arrived E11" at MSY...

....MSY doesn't have an E-concourse, in either terminal. Only its concourses C (old terminal) or A (new terminal) could accept foreign arrivals anyway.

I'm guessing this was their intended gate for IAH, and the website is just glitching?


Parked at A2 in NOLA according to the flight history of the recovery flight (https://flightaware.com/live/flight/UAL ... /KMSY/KIAH)
 
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CALTECH
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 12:17 am

Oil Filter Bypass followed by B Sys Low Pressure.......
 
reltney
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 2:46 pm

GFB wrote:
Now on the ground. It made two circles west of the airport. Unsure if they were able to get the flaps down. Approach looked to be near 160 knots.


160 is about right for a 737-8/900..stupid fast.... Amazingly, the approach speeds on the 757 and even the 747 at max landing weight are slower even with engine out or most flap issues. Some alternate flap extensions take longer due to electrical extension vs normal hydraulic or air extensions.
 
DualQual
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 3:38 pm

reltney wrote:
GFB wrote:
Now on the ground. It made two circles west of the airport. Unsure if they were able to get the flaps down. Approach looked to be near 160 knots.


160 is about right for a 737-8/900..stupid fast.... Amazingly, the approach speeds on the 757 and even the 747 at max landing weight are slower even with engine out or most flap issues. Some alternate flap extensions take longer due to electrical extension vs normal hydraulic or air extensions.


That’s about right for a flaps 15. Even at flaps 30/40 the airplane would fly just fine 10-15 knots slower approaching 757-200 speeds. You’re just going to drag the tail.
 
Blockplus
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 4:01 pm

I have had flap 15/20 maneuvering speeds below target speeds. Plane is definitely not aerodynamically limited.
 
pezzy669
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 4:50 pm

jayunited wrote:
The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.


That INT flight doesn't show as continuing on after dropping down in MSY and looking at other MSY-IAH flights that day did not look like there was any additional segments added - just the already planned flights.

Wonder how many IAH OD passenger just decided to rent a car and trek the 4.5 hours instead of sitting around at MSY waiting for a seat to be available on one of the other MSY-IAH flights.
 
GFB
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 5:01 pm

pezzy669 wrote:
jayunited wrote:
The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.


That INT flight doesn't show as continuing on after dropping down in MSY and looking at other MSY-IAH flights that day did not look like there was any additional segments added - just the already planned flights.

Wonder how many IAH OD passenger just decided to rent a car and trek the 4.5 hours instead of sitting around at MSY waiting for a seat to be available on one of the other MSY-IAH flights.


The recovery flight picked up the UA 1832 flight number in MSY. It landed at IAH at 2:20 pm, which was a bit over 4 hours after their originally scheduled arrival time. United did a very nice job getting the passengers to IAH.
 
Cubsrule
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 5:49 pm

GFB wrote:
pezzy669 wrote:
jayunited wrote:
The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.


That INT flight doesn't show as continuing on after dropping down in MSY and looking at other MSY-IAH flights that day did not look like there was any additional segments added - just the already planned flights.

Wonder how many IAH OD passenger just decided to rent a car and trek the 4.5 hours instead of sitting around at MSY waiting for a seat to be available on one of the other MSY-IAH flights.


The recovery flight picked up the UA 1832 flight number in MSY. It landed at IAH at 2:20 pm, which was a bit over 4 hours after their originally scheduled arrival time. United did a very nice job getting the passengers to IAH.


They also appear to have cleared FIS in New Orleans, as the recovery flight arrived at a domestic gate (C43). That means that the total time loss for at least some passengers was likely well less than 4 hours. A very good recovery by UA indeed, though the good fortune of having an empty 737 scheduled to fly nearly over MSY was a big part of that. Would the f/as on the original flight have been legal to work the recovery flight?
 
BENAir01
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 6:12 pm

jayunited wrote:
The first diversion someone eluded to on February 18th into CUN was do to a hydraulic leak in the B system. I'll let an aircraft mechanic explain what the B system is and what it controls I don't know that is all the report state. Captain was not comfortable with continuing RTB-IAH flight decided to put her down in CUN they swapped aircraft in CUN and continued on to IAH.

The aircraft remained on the ground for maintenance until today when maintenance called the aircraft ready. However enroute CUN-IAH the number 2 engine was shut down in flight the preliminary report does not mention anything about the flaps they are still gathering all the information a final report should be out by tomorrow morning at the latest.

The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.

What was the plane doing at INT? Mx?
 
IAHFLYR
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 6:30 pm

DualQual wrote:
160 is about right for a 737-8/900..stupid fast.... Amazingly, the approach speeds on the 757 and even the 747 at max landing weight are slower even with engine out or most flap issues. Some alternate flap extensions take longer due to electrical extension vs normal hydraulic or air extensions.


That’s about right for a flaps 15. Even at flaps 30/40 the airplane would fly just fine 10-15 knots slower approaching 757-200 speeds. You’re just going to drag the tail.[/quote]

Isn't a flaps 30 pretty much the setting and gives ref speed around 150-155 KIAS for average landing weights?
 
Cubsrule
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 6:43 pm

BENAir01 wrote:
jayunited wrote:
The first diversion someone eluded to on February 18th into CUN was do to a hydraulic leak in the B system. I'll let an aircraft mechanic explain what the B system is and what it controls I don't know that is all the report state. Captain was not comfortable with continuing RTB-IAH flight decided to put her down in CUN they swapped aircraft in CUN and continued on to IAH.

The aircraft remained on the ground for maintenance until today when maintenance called the aircraft ready. However enroute CUN-IAH the number 2 engine was shut down in flight the preliminary report does not mention anything about the flaps they are still gathering all the information a final report should be out by tomorrow morning at the latest.

The 73G that diverted into MSY as the rescue flight was already schedule to operate INT-IAH, UA rerouted the aircraft to MSY to pick up those passengers.

The flight originally left CUN with 133 total passengers, there is always at least 15 passengers give or take a few connecting in IAH to MSY, so if CBP allowed the MSY bound passengers to clear customs in MSY the remaining passenger load could easily fit on a 126 seat 73G.

What was the plane doing at INT? Mx?


UA does some kind of 737 m/x at INT. They are rotating another 73G in from IAH (flights 2734 and 2735) tomorrow morning.
 
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CALTECH
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 6:44 pm

Metal was found on the magnetic chip detectors, Oil Filter Bypass light came on followed by a hydraulic leak at the engine pump area....
Looks like it had a B system pump replaced in CUN just before this incident....
 
freakyrat
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 7:17 pm

GFB wrote:
Interesing tidbit. This plane diverted to CUN two days ago, and this appears to be its first flight since. https://flightaware.com/live/flight/N77538


I saw that they had a hydraulic problem on that flight.
 
jayunited
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 9:15 pm

CALTECH wrote:
Metal was found on the magnetic chip detectors, Oil Filter Bypass light came on followed by a hydraulic leak at the engine pump area....
Looks like it had a B system pump replaced in CUN just before this incident....



Can you explain to those of us who are not mechanics what this means metal found on the magnetic chip detectors? Where in the engine would that metal come from? Was the engine leaking oil, hydraulic fluid or perhaps both? And this caused the captain to shut down the engine mid-flight.
 
Antarius
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 9:30 pm

jayunited wrote:
CALTECH wrote:
Metal was found on the magnetic chip detectors, Oil Filter Bypass light came on followed by a hydraulic leak at the engine pump area....
Looks like it had a B system pump replaced in CUN just before this incident....



Can you explain to those of us who are not mechanics what this means metal found on the magnetic chip detectors? Where in the engine would that metal come from? Was the engine leaking oil, hydraulic fluid or perhaps both? And this caused the captain to shut down the engine mid-flight.


Metal in oil is a sign of wear. It can come from improper lubrication, low lubricant level, alignment issues, vibration or many other caused that results in improper contact or friction.this detector attracts metal particles to give a warning ahead of a major failure.

Oil analysis is common in large engines across industries including power plants, ships, machinery etc.

Hope this helps. This is a high level answer about metal and detection in general, I have no insight into this specific situation.
 
Weatherwatcher1
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 10:21 pm

Cubsrule wrote:
GFB wrote:
pezzy669 wrote:

That INT flight doesn't show as continuing on after dropping down in MSY and looking at other MSY-IAH flights that day did not look like there was any additional segments added - just the already planned flights.

Wonder how many IAH OD passenger just decided to rent a car and trek the 4.5 hours instead of sitting around at MSY waiting for a seat to be available on one of the other MSY-IAH flights.


The recovery flight picked up the UA 1832 flight number in MSY. It landed at IAH at 2:20 pm, which was a bit over 4 hours after their originally scheduled arrival time. United did a very nice job getting the passengers to IAH.


They also appear to have cleared FIS in New Orleans, as the recovery flight arrived at a domestic gate (C43). That means that the total time loss for at least some passengers was likely well less than 4 hours. A very good recovery by UA indeed, though the good fortune of having an empty 737 scheduled to fly nearly over MSY was a big part of that. Would the f/as on the original flight have been legal to work the recovery flight?


The FAs would have overnighted in CUN prior to the flight, so it was only a 6 hour workday for them with the 4 hour stop.
 
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CALTECH
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Sun Feb 21, 2021 10:56 pm

jayunited wrote:
CALTECH wrote:
Metal was found on the magnetic chip detectors, Oil Filter Bypass light came on followed by a hydraulic leak at the engine pump area....
Looks like it had a B system pump replaced in CUN just before this incident....



Can you explain to those of us who are not mechanics what this means metal found on the magnetic chip detectors? Where in the engine would that metal come from? Was the engine leaking oil, hydraulic fluid or perhaps both? And this caused the captain to shut down the engine mid-flight.


Very bad to find metal on the metal chip detectors, MCDs. Usually the metal is from a bearing or gear going bad. They can figure out exactly what component is going bad from the metal chips.

For the NG...

Chip detectors collect and keep unwanted materials from the scavenge oil. Will show if there is mechanical failure of an engine bearing or gear. Chip detectors keep all the ferrous material or non-ferrous material pieces larger than 800 microns.

Each engine on the 737NG has 3 chip detectors, one for each of these three scavenge circuits:
Forward sump, Rear sump, AGB and TGB.

So the MCDs will show a bearing or gear failure.
 
jayunited
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Re: UA 1832 CUN-IAH MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Mon Feb 22, 2021 12:03 am

Thank Antarius and CALTECH I appreciate you both taking the time to explain.
 
wjcandee
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Mon Feb 22, 2021 1:15 am

reltney wrote:
160 is about right for a 737-8/900..stupid fast.... Amazingly, the approach speeds on the 757 and even the 747 at max landing weight are slower even with engine out or most flap issues. Some alternate flap extensions take longer due to electrical extension vs normal hydraulic or air extensions.


Aren't the higher 737 approach speeds due to concerns about controllability in a rudder hardover? I thought all 737s had their approach speeds revised upwards as a safety issue years ago. Or are you saying the engine-out speeds? And wouldn't those have been revised upwards as well?
 
DualQual
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Mon Feb 22, 2021 1:29 am

wjcandee wrote:
reltney wrote:
160 is about right for a 737-8/900..stupid fast.... Amazingly, the approach speeds on the 757 and even the 747 at max landing weight are slower even with engine out or most flap issues. Some alternate flap extensions take longer due to electrical extension vs normal hydraulic or air extensions.


Aren't the higher 737 approach speeds due to concerns about controllability in a rudder hardover? I thought all 737s had their approach speeds revised upwards as a safety issue years ago. Or are you saying the engine-out speeds? And wouldn't those have been revised upwards as well?


That was for the classic airplanes. The NGs, specifically the 8/900 airplanes, have the approach ref speeds artificially increased for tail clearance on landing because of the short gear. The airplane would be aerodynamically capable of flying a slower approach but you’re going to bash the tail on landing. All because of the stupid gear. The 700 flies a normal approach speed.
 
wjcandee
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Mon Feb 22, 2021 1:40 am

DualQual wrote:
That was for the classic airplanes. The NGs, specifically the 8/900 airplanes, have the approach ref speeds artificially increased for tail clearance on landing because of the short gear. The airplane would be aerodynamically capable of flying a slower approach but you’re going to bash the tail on landing. All because of the stupid gear. The 700 flies a normal approach speed.


Thanks for the explanation!!
 
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LAX772LR
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Mon Feb 22, 2021 9:47 am

Cubsrule wrote:
Is MSY’s FIS staffed on Saturday mornings? If so, this shouldn’t be terribly disruptive to passengers.

Yes. Though even if (like in the post-Katrina era, with no scheduled int'l service) it weren't, it doesn't take long for them to pluck CPB agents from the nearby shipping ports as well, when needed.
 
Western727
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Re: UA 1832 IAH-CUN MSY Divert Due to #2 Engine Shutdown Plus Flap Issues

Tue Feb 23, 2021 1:32 pm

FlyHossD wrote:
The right or #2 engine has the engine driven hydraulic pump for the flaps and leading edge devices on the 737s. So maybe the two circles west of the airport were to complete the flap extension to 15 degrees prior to completing the approach. The backup electric pump supplies the same pressure (3,000 PSI), but far less volume, so the flaps and slats are much slower to extend in that case.


I've seen the flaps extended using the electric pump while parked at a gate. It was slow, yes, but didn't take all that long to extend to full flaps, so I doubt the circles were for flap extension. Unless I'm missing something, like air resistance to flap extension that was naturally absent when I observed said extension on the ground.

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