Search found 3180 matches

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by Dalmd88
Sun Jul 25, 2021 2:39 pm
Forum: Technical/Operations
Topic: When did TWA start putting those big black stripe ice detectors on their aircraft wings?
Replies: 13
Views: 1684

Re: When did TWA start putting those big black stripe ice detectors on their aircraft wings?

MD80's had a major problem with wing surface ice. And yes it could cause an engine out if ingested. The inboard section of the wing could form a layer of ice just sitting at the gate on a warm humid day. The remaining fuel from the inbound fight was super cooled and was all in the inboard end of the...

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by Dalmd88
Sun Jul 25, 2021 2:19 pm
Forum: Civil Aviation
Topic: A321 Tire Replacement
Replies: 18
Views: 5899

Re: A321 Tire Replacement

One dumb question: does airline usually equipped their aircraft with spare tires whenever they fly to an outstation? Might cost them some money in weight and potential cargo space, but it'll really helpful in a case like this. CMIIW, I heard that airlines are actually friendly to each other in term...

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by Dalmd88
Fri Jul 23, 2021 7:32 pm
Forum: Civil Aviation
Topic: Updated: Used Delta Aircraft Order A359/737-900ER
Replies: 679
Views: 157937

Re: Updated: Used Delta Aircraft Order A359/737-900ER

Question for the Tech Ops.guys. Does Delta need to wait for the FAA sign off on the mods they do to the first Lion Air ac. before they start mods on the ensuing ac.? Thanks No, as long as the cabin outfitting is identical to the ones currently in the fleet. If they didn't deactivate the mid cabin e...

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by Dalmd88
Sun Jul 18, 2021 2:20 pm
Forum: Technical/Operations
Topic: Pratt and Whitney JT8D Production
Replies: 6
Views: 1273

Re: Pratt and Whitney JT8D Production

This Wikipedia article states that regular JT8D production ended in 1985? But how is that possible when the last MD-80 was delivered in 1999 and I'm sure airlines still needed replacement engines up until recently? Is the article wrong? And if so, when would the last ones have been built? Thank you...

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by Dalmd88
Sun Jul 18, 2021 2:03 pm
Forum: Civil Aviation
Topic: Updated: Used Delta Aircraft Order A359/737-900ER
Replies: 679
Views: 157937

Re: Updated: Used Delta Aircraft Order A359/737-900ER

Don't these LionAir 739s have a door aft of the wing where as DL only has a plug? Even when the door is plugged, the opening is still there. DL will just swap the door for a plug. The 'plug' is actually the deactivated door with a blank interior panel covering the opening. That door is only intende...

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by Dalmd88
Sat Jul 17, 2021 2:24 pm
Forum: Technical/Operations
Topic: Pratt and Whitney JT8D Production
Replies: 6
Views: 1273

Re: Pratt and Whitney JT8D Production

This Wikipedia article states that regular JT8D production ended in 1985? But how is that possible when the last MD-80 was delivered in 1999 and I'm sure airlines still needed replacement engines up until recently? Is the article wrong? And if so, when would the last ones have been built? https://e...

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by Dalmd88
Sun Jun 27, 2021 1:52 pm
Forum: Civil Aviation
Topic: Airlines vaccinating their personnel/staff
Replies: 62
Views: 7078

Re: Airlines vaccinating their personnel/staff

Delta has been giving employees vax on site in many of the stations. We even had a public state mass drive though site at the General Offices back in the winter. I think it was the first State site to open up. There has been no get it or lose your job threats. Only strong encouragement Including pay...

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by Dalmd88
Sun Jun 06, 2021 7:41 pm
Forum: Civil Aviation
Topic: "Delta's 757s are their biggest liability"
Replies: 100
Views: 21619

Re: "Delta's 757s are their biggest liability"

Heh, would be cool if the 757s got the DC9 treatment and flew in modest numbers (even just 30 or 40) past 2030. Possible? Probably, unless fuel becomes an issue. The 757 fleet did get a complete interior overhaul just a few years ago when they were converted to a standard 199 pax config. All new ov...

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by Dalmd88
Wed Jun 02, 2021 8:39 pm
Forum: Technical/Operations
Topic: Retro-jet maintenance
Replies: 8
Views: 2470

Re: Retro-jet maintenance

There really isn't much to keeping the bare aluminum nice. Just a lot of manpower. It's just a pneumatic driven buffer with a very light polishing compound. It's similar to what is used when a car is detailed. It is a mind numbing task in my eyes. I worked a maintenance contract once where we had to...

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by Dalmd88
Mon May 24, 2021 8:43 pm
Forum: Technical/Operations
Topic: Post retirement…options
Replies: 15
Views: 2778

Re: Post retirement…options

I'm in the same age group. My plan is very much like fr8mech. When my window to retire opens in 7-8 years I'm out if it make financial sense. My wife will still be working. We plan on moving to a more retirement friendly area where she can still work remotely and I can do what ever. I do not intend ...

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by Dalmd88
Sat May 22, 2021 2:43 pm
Forum: Civil Aviation
Topic: Trump's Parked 757 N757AF
Replies: 135
Views: 41557

Re: Trump's Parked 757 N757AF

The plane is 30 years old and is probably unlikely to return to service. Let's avoid political rhetoric Given this was Paul Allens plane then Trumps. How many cycles does this plane have? I bet it is very low for a 30 year old plane. I bet the limitations are how long Boeing supports the 757 and Ro...

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by Dalmd88
Mon May 10, 2021 8:00 pm
Forum: Technical/Operations
Topic: Which planes run out of engine hours first
Replies: 17
Views: 5128

Re: Which planes run out of engine hours first

Yes, EGT is Exhaust Gas Temp. It's a parameter that can gauge the health of an engine. Each engine model has a max EGT limit for normal operation. On a test run the EGT is recorded at max power. The engine has to make full max rated power with an EGT temp lower than max temp. If it doesn't then the ...

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by Dalmd88
Thu May 06, 2021 9:38 pm
Forum: Civil Aviation
Topic: Delta Fleet Thread - 2021
Replies: 1060
Views: 217281

Re: Delta 757s without winglets?

Some of the non winglet 757 are not approved for winglets. Structural repairs to the wing skin or interior can make the plane not approved for the mod. The winglet adds a lot of load to the wing. Yes, there is a lot of modification that takes place inside the wing as part of the package, but sometim...

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by Dalmd88
Sat Apr 24, 2021 4:00 pm
Forum: Technical/Operations
Topic: Why can a pax stand upright in downstairs toilets?
Replies: 10
Views: 4052

Re: Why can a pax stand upright in downstairs toilets?

One thing to remember is in a cargo bin area of the belly you have the container handling system installed in the floor. that takes up at least 6-8" (15-20mm). So if you were to put a permanent crew structure or passenger lav in that space the floor can be lower in the bilge area. There is a lo...

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by Dalmd88
Sat Apr 24, 2021 3:47 pm
Forum: Civil Aviation
Topic: Delta Orders Another 25 A321 NEO + 25 Options
Replies: 161
Views: 27989

Re: Delta Orders Another 25 A321 NEO + 25 Options

As I recall, Delta made a deal with P&W to be an MRO for the P&W geared turbofan engines on the A220s and A320 NEOs, but couldn't get a similar deal with CFM for the engines used on the B-737Max. As such, it would seem Delta is highly likely to buy A320NEO aircraft instead of B-737Max for t...

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by Dalmd88
Tue Apr 20, 2021 2:48 pm
Forum: Technical/Operations
Topic: Commuting Logistics for Airport Employees
Replies: 22
Views: 4142

Re: Commuting Logistics for Airport Employees

When I worked BOS Line MTC we had three options when I started. Free commuter bus service run by the airport authority from the public paid park and ride lots in the suburbs. The airline paid for the monthly parking pass and bus vouchers. Option B was drive to the airport and park in a company lot. ...

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by Dalmd88
Sun Apr 11, 2021 2:43 pm
Forum: Civil Aviation
Topic: Will airlines require COVID vaccine for employees?
Replies: 226
Views: 19277

Re: Will airlines require COVID vaccine for employees?

Companies don't have much to stand on currently to make it mandatory to have a vaccine. All of the vaccines are currently only approved for emergency use. They are considered experimental. Even the US military can not mandate that emergency use vaccines are required. I highly doubt that even when th...

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by Dalmd88
Sat Mar 20, 2021 3:31 pm
Forum: Technical/Operations
Topic: Why are engines on planes changed so often?
Replies: 18
Views: 3821

Re: Why are engines on planes changed so often?

Doing it by the book, how long to remove an engine? How long to replace one? A crew I worked on could do a 757 engine change in less than a 10 our overnight shift. Towed into the hangar at the start of the shift and pushing out for the engine runs right near the end. That was fully prepped QEC chan...

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by Dalmd88
Sat Mar 20, 2021 3:10 pm
Forum: Technical/Operations
Topic: How are aircraft scheduled for major airlines?
Replies: 4
Views: 1423

Re: How are aircraft scheduled for major airlines?

Aircraft routing is usually set three days out. In reality it is fluid up until the flight happens. Like other have said the big events are planned out months or weeks ahead, while daily events like a certain tail number needs a Service Check or has an MEL that needs to be addressed get planned out ...

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by Dalmd88
Sat Feb 27, 2021 2:55 pm
Forum: Civil Aviation
Topic: Single Delta 737 parked since 2019
Replies: 23
Views: 7249

Re: Single Delta 737 parked since 2019

But if the engines were coming due and it was parked due to an upcoming engine overhaul, how to explain somebody else's assertion that they took the engines off it and used them on another aircraft? Where are the engines if that isn't what happened? Did they send them for overhaul? But -- wait -- t...

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by Dalmd88
Wed Jan 27, 2021 10:13 am
Forum: Military Aviation & Space Flight
Topic: Metroliner and RC-135 over LAS
Replies: 4
Views: 1521

Re: Metroliner and RC-135 over LAS

The Metro would indicate a counter drug mission. I think those are ANG aircraft are still regulated to only do counter drug missions. They were when they first came out. I worked on them during the launch at three different bases. It's officially just a C-26B. I don't think they ever gave it the RC ...

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by Dalmd88
Fri Jan 22, 2021 10:53 pm
Forum: Civil Aviation
Topic: Why no second commercial airport for Atlanta?
Replies: 186
Views: 22646

Re: Why no second commercial airport for Atlanta?

From an out of stater, I don’t consider LZU part of Atlanta. To me, and solely in my opinion, it’s look to be too far away from Atlanta. Kinda like Tampa and Lakeland or Ft Myers and Punta Gorda. Allegiant would be the only player, in my opinion, to go. Allegiant loves those small little airports t...

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by Dalmd88
Thu Jan 21, 2021 9:13 pm
Forum: Civil Aviation
Topic: Why no second commercial airport for Atlanta?
Replies: 186
Views: 22646

Re: Why no second commercial airport for Atlanta?

Y'all let me know where you can put an airport in the Atlanta area close to, or the same distance, from the business district as ATL... This is the biggest thing. If you're coming to Atlanta, you really can't beat where Hartsfield is - the fact that it's inside the perimeter (aside from that one li...

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by Dalmd88
Sun Jan 17, 2021 3:05 pm
Forum: Travel, Polls & Preferences
Topic: Travel restrictions and fullness of airplanes
Replies: 10
Views: 1157

Re: Travel restrictions and fullness of airplanes

Belly cargo is still flying all over the world. At Delta we even started a few international routes just for belly cargo.

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by Dalmd88
Sun Dec 13, 2020 3:59 pm
Forum: Civil Aviation
Topic: Delta Narrow Body Thread - 2020
Replies: 724
Views: 100178

Re: Delta Narrow Body Thread - 2020

Interesting to see all the churn in the 717 fleet. I'm curious on a few things. - are the aircraft being moved to SBD & BYH; owned or leased - how do leases work in regards to engines and lease returns DL was in the midst of facing a large number of overhauls on the 717 engines and had set-up c...

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by Dalmd88
Fri Dec 11, 2020 4:01 pm
Forum: Technical/Operations
Topic: How much hydraulic pressure does the APU provide vs the engines?
Replies: 12
Views: 2495

Re: How much hydraulic pressure does the APU provide vs the engines?

It doesn't really effect the brake system much. The brakes have a large hydraulic accumulator the provides a backup of full pressure even with no hydraulic systems pressurized. It's been I while since I've been around the 737, but I think it gives you 2-3 full applications. I think the pressure from...

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by Dalmd88
Thu Nov 26, 2020 2:37 am
Forum: Technical/Operations
Topic: Wingletless DL 752s
Replies: 10
Views: 2388

Re: Wingletless DL 752s

I think there are only a couple of wingletless flying in the Delta fleet. That doesn't include the NBA 752 fleet which I think had the winglets removed. The stage length of their typical flights make them uneconomical to operate. Those that don't have winglets have structural issues that prevented t...

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by Dalmd88
Sat Nov 21, 2020 9:40 pm
Forum: Technical/Operations
Topic: Tariffs on importing Airbus planes to the US
Replies: 6
Views: 1761

Re: Tariffs on importing Airbus planes to the US

I don't think it was in Delta's plan to import the planes as used after six months. We began taking delivery of A350's about a year ago through Japan. Those airframes still have not been imported into the US. I think the plan was to wait out the current administration and hope the new guy drops the ...

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by Dalmd88
Fri Nov 20, 2020 2:51 pm
Forum: Technical/Operations
Topic: Questions on how to become a pilot and training
Replies: 128
Views: 3256

Re: Question about education and work as a mechanic

In the US it's tough finding a place to do the 30 months of experience. That will be willing to go through the trouble of accounting for your time, and give you a varied enough experience to satisfy the FAA. In 18 months you can get the traditional inclass/practical tech school finished and take you...

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by Dalmd88
Wed Nov 18, 2020 4:20 pm
Forum: Civil Aviation
Topic: Is DL taking delivery of A350’s from NRT to avoid tariffs?
Replies: 215
Views: 34801

Re: Is DL taking delivery of A350’s from NRT to avoid tariffs?

That is very interesting, indeed. According to the U.S. Trade Representative, a new aircraft is one with “no time in service or hours in flight other than for production testing” or for delivery to the U.S. That suggests the plane is no longer new once it’s flown a non-U.S. route for any other purp...

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by Dalmd88
Sat Nov 07, 2020 3:25 pm
Forum: Technical/Operations
Topic: Ground pin on power sockets
Replies: 12
Views: 2422

Re: Ground pin on power sockets

The airplane must be grounded to the earth when sitting at the gate or in a hangar. The ground pin in the Ext power I think just makes the power unit and the plane connected. There also has to be a ground wire from the airframe to the actual ground to dissipate static charge. The power unit also nee...

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by Dalmd88
Fri Nov 06, 2020 1:18 pm
Forum: Civil Aviation
Topic: Fedex Feeder Timing
Replies: 17
Views: 5099

Re: Fedex Feeder Timing

The mini hubs are nothing new. I first saw them in action back in the early 90's. I worked in SYR. There were 2-3 planes that fed UPS there. A couple of Navajos I think and a Caravan. MHT had a sizable FedEx operation run by Wiggins using Caravans. My next job was working for the Merlin Express side...

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by Dalmd88
Sun Nov 01, 2020 1:52 pm
Forum: Technical/Operations
Topic: Question about ground personnel
Replies: 18
Views: 1805

Re: Question about ground personnel

For most major US airlines Ramp staff do not clean airplanes as one other poster stated. that is usually an outsource company job. The other tasks they typically don't do is fuel the plane, outside company does that, or fix the plane, need to have FAA license to do that. Mechanics can do the tasks o...

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by Dalmd88
Wed Oct 21, 2020 10:23 pm
Forum: Technical/Operations
Topic: Fasteners on composite aircraft
Replies: 10
Views: 2349

Re: Fasteners on composite aircraft

It's been a while since I did structural work and I didn't do too much with composite panels, but I think for most panels there were never tolerance fit fasteners through composite. I think like Ti, they were always clearance fit through the composite panel. Seems like they were always 'wet install'...

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by Dalmd88
Wed Oct 21, 2020 10:19 pm
Forum: Civil Aviation
Topic: Delta Narrow Body Thread - 2020
Replies: 724
Views: 100178

Re: Delta Narrow Body Thread - 2020

Thanks for the reply. Maint sure gets expensive. I think an A check is weekly, a B check is monthly, a C check is yearly and a D check is every 4 years. There are some max hours allowed to be flown too for each of the 4 checks as well. Then there is Landing Gear overhaul and Engine Mx and overhaul....

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by Dalmd88
Fri Oct 16, 2020 5:54 pm
Forum: Technical/Operations
Topic: Commonality between the 737 Original and 737NG?
Replies: 29
Views: 5298

Re: Commonality between the 737 Original and 737NG?

I’m sure there’s some things that are the same. Maybe the windshield glass. Maybe the passenger window panes. Maybe the radome. From a airframe structures view they are very similar. I think the NG skin panels are improved, but most of the frame and stringer structure shares a lot with the classic....

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by Dalmd88
Fri Oct 16, 2020 5:48 pm
Forum: Technical/Operations
Topic: When does it become safe to approach an engine after shutoff?
Replies: 15
Views: 2906

Re: When does it become safe to approach an engine after shutoff?

I am pretty sure OSHA would have frowned upon some of the things done on a DC-10 to reduce vibration on the wing by changing some of the bolts on the spinner. I would say that we are OSHA compliant when performing a task like that. If not it could result in unpaid days off. You don't change the spi...

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by Dalmd88
Fri Oct 16, 2020 1:16 pm
Forum: Civil Aviation
Topic: Is the RR 787 engine problem fixed yet?
Replies: 64
Views: 12679

Re: Is the RR 787 engine problem fixed yet?

I think Rolls has turned the corner on the T1000 issues. That is as long as the new blade sets meet the expectations over the long term. We were told that as of June there were no more AOG aircraft in the system that Rolls was responsible for. The work through the shops has continued since that time...

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by Dalmd88
Mon Oct 12, 2020 8:33 pm
Forum: Civil Aviation
Topic: Rumor: DL looking to trade 717s for 737 Max
Replies: 731
Views: 138271

Re: Could Delta Order 737 MAX?

According to Reuters, Boeing has had discussions with Delta Air Lines to take up to 40 Boeing already-built 737 MAX aircraft, no doubt at a HUGE discount. Source: https://www.reuters.com/article/boeing-737max-delta/boeing-courting-delta-others-to-take-737-max-white-tails-sources-idUSKBN26M5JK As a ...

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by Dalmd88
Mon Oct 05, 2020 12:53 pm
Forum: Civil Aviation
Topic: American Hangar LGA Razed
Replies: 33
Views: 9360

Re: American Hangar LGA Razed

I don't think those hangars have been used for aircraft maintenance for many years now. I don't think they had the roof height for any AA planes to fit. All of the aircraft maintenance at LGA is done outside.

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by Dalmd88
Sat Oct 03, 2020 1:59 pm
Forum: Civil Aviation
Topic: Fate of 717 post Delta
Replies: 192
Views: 35268

Re: Fate of 717 post Delta

I cannot create a scenario where Boeing paying the costs is to their advantage. Boeing it turns out is selling 717s to Delta. No one would make a 10 year commitment to an old worn plane where none have less than 30k cycles with an expensive to overhaul engine. Boeing makes most of their profit sell...

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by Dalmd88
Fri Oct 02, 2020 8:19 pm
Forum: Travel, Polls & Preferences
Topic: Does MESA really deserve its "bad" reputation
Replies: 53
Views: 5961

Re: Does MESA really deserve its "bad" reputation

It was an eons ago but my personal experience with Mesa was not great. They were dumping their very used Be1900. some of the oldest ones flying. I worked for another low budget operation in the Midwest at the time. We picked up 4-5 of their old planes. They were absolute garbage. The wiring in the c...

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by Dalmd88
Fri Oct 02, 2020 8:09 pm
Forum: Civil Aviation
Topic: Fate of 717 post Delta
Replies: 192
Views: 35268

Re: Fate of 717 post Delta

Wayex- I read a response from Lightsaber noting that the correct engine is the BR700-715 and coming clean he was incorrect. Can't find it now. On either the A319 or B738 is there a way to use the electric starter to rotate the engine sufficient to get cooling. Even 1 or 2 RPM should provide a nice ...

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by Dalmd88
Thu Oct 01, 2020 12:03 am
Forum: Civil Aviation
Topic: Fate of 717 post Delta
Replies: 192
Views: 35268

Re: Fate of 717 post Delta

These contracts are typical at US vendors. For whom it doesn't matter, except the military will do cost+ for batches, but they have learned to buy the minimum economic lot. Boeing paid vendors to keep the 717 running. The issue is, certain vendors won't take a payment. It doesn't matter who you are...

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by Dalmd88
Fri Sep 18, 2020 2:25 pm
Forum: Civil Aviation
Topic: Is DL taking delivery of A350’s from NRT to avoid tariffs?
Replies: 215
Views: 34801

Re: Is DL taking delivery of A350’s from NRT to avoid tariffs?

I know the cruise industry is pretty much stuck in port, but they are a prime example of a similar tactic. For most of their existence companies like Carnival and Royal Caribbean have been US companies, but ever notice the name on the back of the ships? Ships are almost always registered in places l...

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by Dalmd88
Sun Sep 06, 2020 2:11 pm
Forum: Technical/Operations
Topic: Oxygen masks dropped accidentally
Replies: 10
Views: 1739

Re: Oxygen masks dropped accidentally

Cabin drop checks are done during most of the C checks I've worked on. The O2 generators have a life span and need to be replaced. I can't recall the frequency but It might be 10 years. The masks them selves used to be good for the life of the airplane, but I recall we began changing them out as a c...

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by Dalmd88
Sat Sep 05, 2020 1:42 pm
Forum: Technical/Operations
Topic: Insurance of Commercial Planes for the Airlines - Questions
Replies: 5
Views: 1724

Re: Insurance of Commercial Planes for the Airlines - Questions

I have no idea whether my airline (US based - over 100 aircraft - all Airbus narrowbodies) can be considered representative or not, but our airline according to our certificate of insurance is covered by 14 different insurers. The aircraft are listed by tail number/serial number and when new aircra...

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by Dalmd88
Thu Sep 03, 2020 10:35 am
Forum: Technical/Operations
Topic: Boeing 737-800NG Flaptrack circle
Replies: 15
Views: 3632

Re: Boeing 737-800NG Flaptrack circle

If I recall there is also a lube point at the bolts. So it gets removed at every wing lube visit. Same with the little diamond panel in DL_Mech's pic.

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by Dalmd88
Sun Aug 23, 2020 3:25 pm
Forum: Civil Aviation
Topic: Updated: DL retired MD-80/90s quickly
Replies: 1226
Views: 275384

Re: Updated: DL retired MD-80/90s quickly

Most of the differences are the mounts on the engine, and therefore the test cell. And the IAE requirement for the cell to accommodate tilt and vibration. The canny Kiwis designed and built an adaptor to replicate under and side attachment, which presumably can be replicated for the right fee. Delt...

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by Dalmd88
Fri Aug 21, 2020 2:35 pm
Forum: Civil Aviation
Topic: Updated: DL retired MD-80/90s quickly
Replies: 1226
Views: 275384

Re: Updated: DL retired MD-80/90s quickly

Does anyone know why the MD-90 was retired so quickly from airline fleets? It's not like it was even an "old" aircraft or that its demise was due to COVID, it was already being retired from airline service as early as the beginning of the 2010s despite deliveries only ending in 2000, plus...

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