Search found 20698 matches

by Starlionblue
Wed Aug 04, 2021 4:01 am
Forum: Technical/Operations
Topic: Thrust limits for derated jet engine?
Replies: 4
Views: 533

Re: Thrust limits for derated jet engine?

As discussed above, there are thrust limitations in the installation itself. These cannot be overridden by the pilots. We simply get up to the maximum "installed". We typically use reduced thrust (that is, less than the "installed" max thrust) to reduce engine wear. Mostly this i...

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by Starlionblue
Tue Aug 03, 2021 3:00 am
Forum: Technical/Operations
Topic: Can severe turbulence damage avionics in the E&E bay?
Replies: 9
Views: 760

Re: Can severe turbulence damage avionics in the E&E bay?

All the stuff down there is quite rugged and bolted down or strapped down neatly. The innards of modern instruments aren't really that sensitive. They're solid state so nothing to shake loose really. Not even gyros have moving parts nowadays. For that matter, older instruments which do have moving b...

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by Starlionblue
Tue Aug 03, 2021 1:16 am
Forum: Technical/Operations
Topic: At what height above field elevation is takeoff thrust reduced [increased] to climb thrust
Replies: 12
Views: 729

Re: At what height above field elevation is takeoff thrust reduced [increased] to climb thrust

In our case, the thrust reduction and acceleration altitudes are typically both 1500ft AAL. Nose down. Reduce thrust to the CLB detent. Accelerate and clean up. Maintain green dot (max L/D ratio until 3000ft. Basically NADP2. Some airports have different procedures, which require variation of thrust...

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by Starlionblue
Sat Jul 31, 2021 5:33 am
Forum: Technical/Operations
Topic: MD-11: Two types of outboard flap tracks fairings
Replies: 9
Views: 862

Re: MD-11: Two types of outboard flap tracks fairings

1925902,1491699 I don't know how to do that. The airliners.net photo numbers showing the two different types of flap track fairing on the MD-11 are #1925902 and #1491699 if that helps. If you click "Full Editor and Preview" you get the buttons "PhotoID", "TwoID" and &q...

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by Starlionblue
Fri Jul 30, 2021 3:06 am
Forum: Technical/Operations
Topic: Why do pilots do 'Wheelies' after landing?
Replies: 25
Views: 4155

Re: Why do pilots do 'Wheelies' after landing?

Or just keeping holding it off before the mains have even touched... ;) https://youtu.be/7GpY8HCVlEs Another angle (caution, this one has NSFW commentary) https://youtu.be/dWJwnIxiAyc I'm curious as to what happened here. Ground shy? At least they finally got the nose down in a rather positive manne...

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by Starlionblue
Thu Jul 29, 2021 7:04 am
Forum: Technical/Operations
Topic: About Medical Diversions - What Countries Pilots Prefer To Divert? Are These The Same As The Alternate Airport?
Replies: 10
Views: 1277

Re: ABOUT MEDICAL DIVERSIONS - WHAT COUNTRIES PILOTS PREFER TO DIVERT? ARE THESE SAME AS THE ALTERNATE AIRPORT?

The person with a medical issue him/herself is typically a non-issue when it comes to immigration. A solution will be found. For the rest of the pax, of whom a number might not have permission to enter, the best is a "fuel and go" if possible within duty limits. Otherwise pax and crew migh...

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by Starlionblue
Thu Jul 29, 2021 2:43 am
Forum: Technical/Operations
Topic: Maximum gross weight step climb question
Replies: 20
Views: 1413

Re: Maximum gross weight step climb question

A lot depends on environmental conditions on the day. If the air is colder, you can climb higher at the same weight.

That being said, I'm with GalaxyFlyer. I doubt any jetliner can climb to the operational ceiling after a MTOW takeoff.

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by Starlionblue
Thu Jul 29, 2021 2:42 am
Forum: Technical/Operations
Topic: Why do pilots do 'Wheelies' after landing?
Replies: 25
Views: 4155

Re: Why do pilots do 'Wheelies' after landing?

flyingturtle wrote:
..and the nose is lowered a few seconds before elevator authority is lost?


Yes. Or more accurately, using the correct technique means you won't run out of elevator authority, because you'll lower the nose in time.

There's no rush really. Just don't hold it off. "Fly" the nose gear down.

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by Starlionblue
Wed Jul 28, 2021 3:23 pm
Forum: Technical/Operations
Topic: When did TWA start putting those big black stripe ice detectors on their aircraft wings?
Replies: 13
Views: 1802

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

mrcoffee wrote:
I remember once in the early 90's getting deiced on the MD80 redeye to STL. From Phoenix. :) (And no, it wasn't the middle of winter.)


I've walked under the wing in Jakarta on a 30+ degree C day and been dripped on from ice melting under the wing. :D

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by Starlionblue
Tue Jul 27, 2021 6:48 am
Forum: Technical/Operations
Topic: Why do pilots do 'Wheelies' after landing?
Replies: 25
Views: 4155

Re: Why do pilots do 'Wheelies' after landing?

The 757 has a nasty characteristic of the nosewheel slamming down very abruptly if you don’t watch for it, in the past this has caused significant aircraft damage and even caused airframe write offs You need to pay extra attention and take extra care to deliberately and smoothly lower the nosewheel...

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by Starlionblue
Sat Jul 24, 2021 4:56 am
Forum: Technical/Operations
Topic: Sinking feeling when leveling off on B757
Replies: 11
Views: 1797

Re: Sinking feeling when leveling off on B757

It's physics. ;)

As the aircraft levels off at an altitude, it transitions from climbing to level. This means a slight decrease in G force acting on your body. The pitch change increases the effect.

An analogue would be going over the top of a hill with a pointy crest in a car.

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by Starlionblue
Sat Jul 24, 2021 2:56 am
Forum: Technical/Operations
Topic: Reducing to climb power during a turn
Replies: 12
Views: 1781

Re: Reducing to climb power during a turn

GalaxyFlyer wrote:
Starlionblue wrote:
CosmicCruiser wrote:
you can always just lower the nose as you reduce power


That's what the FD tends to tell you to do anyway. ;)


I certainly hope a competent pilot wouldn’t need a FD to know that!


:rotfl: :rotfl: :rotfl:

"Hmmm. I wonder why the speed is decaying so fast..."

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by Starlionblue
Fri Jul 23, 2021 7:21 am
Forum: Technical/Operations
Topic: Qatar Airways threatens Pilots for taxiing with both engines
Replies: 46
Views: 9641

Re: Qatar Airways threatens Pilots for taxiing with both engines

In 2005 there was an incident at MSP with a NW DC9. The DC9 landed and had a failure of its right hydraulic system. The pilots mistakenly believed it was a pressure indication problem. They proceeded to taxi to the terminal using their company’s single engine taxi policy. They shut down the left en...

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by Starlionblue
Fri Jul 23, 2021 1:27 am
Forum: Technical/Operations
Topic: Reducing to climb power during a turn
Replies: 12
Views: 1781

Re: Reducing to climb power during a turn

CosmicCruiser wrote:
you can always just lower the nose as you reduce power


That's what the FD tends to tell you to do anyway. ;)

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by Starlionblue
Wed Jul 21, 2021 1:15 am
Forum: Technical/Operations
Topic: Sunwing 737 Runway 28 Landing at SXM on video
Replies: 53
Views: 8479

Re: Sunwing 737 Runway 28 Landing at SXM on video

As stated by 737maxxx, that was a visual approach, not circling. A circling approach implies flying the approach for another runway (in this case the reciprocal one) and then manoeuvring visually to position for the runway in use. Circling approaches used to be more common, but many companies don't...

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by Starlionblue
Wed Jul 21, 2021 1:10 am
Forum: Technical/Operations
Topic: 737 max safety card question
Replies: 19
Views: 3473

Re: 737 max safety card question

It's a life jacket. Most likely they come from the lowest bidder at the time of purchase. ;)

One might think that clip is more expensive but it's the total cost of the unit that counts. At a guess, in some cases, clip style fastener jackets may be cheaper, depending on supply chain vagaries.

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by Starlionblue
Sat Jul 17, 2021 2:32 am
Forum: Technical/Operations
Topic: Lowering flaps and gear at the same time.
Replies: 17
Views: 1868

Re: Lowering flaps and gear at the same time.

At my operator, it is convention to lower gear first, wait until it has stopped transiting, then call flaps 3. However, there's no limitation on doing them together. On the A330, slats are powered by blue + green systems, whilst flaps are powered by green + yellow systems. If you lose a system, the ...

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by Starlionblue
Fri Jul 16, 2021 1:57 am
Forum: Technical/Operations
Topic: Flap movement always in stages?
Replies: 14
Views: 1798

Re: Flap movement always in stages?

Sorta. It depends on whether you are above or below auto-retract speed. The flap movement speeds on takeoff and approach are normally a bit different, so in effect it makes a difference whether you are approaching or departing. For example, you might not retract to clean until 230 knots when depart...

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by Starlionblue
Fri Jul 16, 2021 1:52 am
Forum: Technical/Operations
Topic: Vortex Generators and Quality of Wing Design
Replies: 1
Views: 549

Re: Vortex Generators and Quality of Wing Design

Vortex generators aren't necessarily band-aids. They can just be a simpler and cheaper way of achieving the design objective.

Or, such as on the Beech 1900, they are due to a change in the airframe well beyond what the initial designers anticipated.

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by Starlionblue
Fri Jul 16, 2021 1:51 am
Forum: Technical/Operations
Topic: Qatar Airways threatens Pilots for taxiing with both engines
Replies: 46
Views: 9641

Re: Qatar Airways threatens Pilots for taxiing with both engines

Is it really that difficult to disengage an engine after landing and taxi to the gate with just one engine producing power ? Yes, there may be an exceptional circumstance on a particular flight but I don't know of any company that likes its employees wasting money It's easy to switch an engine off ...

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by Starlionblue
Thu Jul 15, 2021 1:31 pm
Forum: Technical/Operations
Topic: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?
Replies: 20
Views: 3028

Re: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

PRBC?

fr8mech wrote:

Starlionblue wrote:
Apart from the pilots. ;)


The yoke actuator and the short between the headset are a problem that transcends aircraft type.


:rotfl: :rotfl: :rotfl:

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by Starlionblue
Thu Jul 15, 2021 8:57 am
Forum: Technical/Operations
Topic: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?
Replies: 20
Views: 3028

Re: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

Apart from the pilots. ;)

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by Starlionblue
Thu Jul 15, 2021 3:10 am
Forum: Technical/Operations
Topic: Flap movement always in stages?
Replies: 14
Views: 1798

Re: Flap movement always in stages?

This is slightly off-topic, but on the bus if you put the flap lever in 1, the actual position of the flaps and slats depends on if the airplane thinks you're taking off or landing? Sorta. It depends on whether you are above or below auto-retract speed. The flap movement speeds on takeoff and appro...

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by Starlionblue
Wed Jul 14, 2021 8:24 am
Forum: Technical/Operations
Topic: Flap movement always in stages?
Replies: 14
Views: 1798

Re: Flap movement always in stages?

SOP dictates going through the steps. Also, flap levers have gates so you can't move directly from some settings to others. You don't always pass through all the stages. For example, on the A330 and A350, you retract from three to one on takeoff and go around. Also, if you're at Flaps One on takeoff...

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by Starlionblue
Tue Jul 13, 2021 1:07 am
Forum: Technical/Operations
Topic: Flight Deck Temperature Comfort
Replies: 19
Views: 3113

Re: Flight Deck Temperature Comfort

The A330 and A350 are fine, with quite consistent temperature. The A350 seems a bit more efficient on the cooling front. Since we fly both, many guys seem to set the knob at the same setting as the A330, often resulting in a bit of a chill. There are plenty of adjustable air vents, including a gaspe...

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by Starlionblue
Mon Jul 12, 2021 1:43 am
Forum: Technical/Operations
Topic: Biz-jet thrust reversers activated whilst taxiing.
Replies: 24
Views: 2511

Re: Biz-jet thrust reversers activated whilst taxiing.

Thanks for all the replys. Begs the question why engine idle speeds can't be reduced to lower minimums. Because the engines would stop if the mass flow was much lower than idle. As CRJockey says, it isn't really a problem in the real world. Unless you're in a crowded area or about to turn, you just...

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by Starlionblue
Sun Jul 11, 2021 1:33 am
Forum: Technical/Operations
Topic: Bump on Boeing 737-200 engine
Replies: 9
Views: 1599

Re: Bump on Boeing 737-200 engine

A picture would really help. :)

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by Starlionblue
Sat Jul 10, 2021 6:57 am
Forum: Technical/Operations
Topic: New FAA Standard Weights: A Summer and Winter of Fuel Stops?
Replies: 36
Views: 3513

Re: New FAA Standard Weights: A Summer and Winter of Fuel Stops?

I wasn't thinking about lift from a slight breeze changing the weight on the scales. Thanks for pointing that out! It’s not so much about the wind causing lift (weight reduction) as that’s pretty immaterial. What it does do is create eccentric loading. Take a scale outside and hold a large piece of...

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by Starlionblue
Thu Jul 08, 2021 10:09 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

But it keeps you busy on long flights. We had some engineers who'd get creative with their questions with new F/E's, and you'd better know which parts on the C-130 was made of wood. Same engineers did not like it as much if you'd ask them technical stuff about the FMS or navigation :bouncy: Let's n...

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by Starlionblue
Thu Jul 08, 2021 2:22 am
Forum: Technical/Operations
Topic: New FAA Standard Weights: A Summer and Winter of Fuel Stops?
Replies: 36
Views: 3513

Re: New FAA Standard Weights: A Summer and Winter of Fuel Stops?

Why can't scales be installed at the gates? I would think that a pad for each gear strut would be well within the technological limitations in 2021. Then, everything can be based on an exact weight. That or a scale that each passenger walks over with their carry on items. They can get the checked b...

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by Starlionblue
Mon Jul 05, 2021 2:40 pm
Forum: Technical/Operations
Topic: Needing Sponsorship
Replies: 10
Views: 1716

Re: Needing Sponsorship

I think it would probably easier to find someone to marry and gain citizenship to gain employment than to find an air carrier that sponsors for an H-1b visa. Green card lottery is another very viable alternative. Odds should be pretty good as i cant imagine lots of canadians apply for that. Canadia...

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by Starlionblue
Mon Jul 05, 2021 3:24 am
Forum: Technical/Operations
Topic: A350-1000 versus B777-300ER
Replies: 62
Views: 12432

Re: A350-1000 versus B777-300ER

Bear in mind the 777 is a quarter-century older basic design. The A350 has superior performance. The same is true of the 737, yet it also has something like 5,000 frames on order vs. the newer A320. The 737MAX has new engines and a bunch of other improvements. The 777 does not, until the 777X enter...

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by Starlionblue
Sun Jul 04, 2021 5:09 am
Forum: Technical/Operations
Topic: Carry on baggage selecting at gate
Replies: 16
Views: 1868

Re: Carry on baggage selecting at gate

I'll stand up for the roll-a-board and say as a airline passenger with almost two million miles under my belt I've never had my roll-a-board gate checked except on smaller RJ's, but you have to expect to happen as there is simply no overhead it will fit into. I remember flying Virgin Atlantic in th...

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by Starlionblue
Sun Jul 04, 2021 1:24 am
Forum: Technical/Operations
Topic: Pros and Cons of Flap Track Placement
Replies: 2
Views: 914

Re: Pros and Cons of Flap Track Placement

On modern airliners, flap track fairings are important for area ruling. If they only had to contain the flap tracks, they'd be much smaller. On widebodies, Airbus has an unbroken flap line, while Boeing has a high-speed aileron far inboard. There are pros and cons to both configurations, mostly havi...

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by Starlionblue
Sun Jul 04, 2021 1:18 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

It's like the updated sharklets on the A350. It has no material effect on how we operate the aircraft, so it isn't really an important piece of knowledge. I never knew that Airbus updated the Sharklets on the A350. How do the new Sharklets differ from the first A350 to enter service? Do they apprec...

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by Starlionblue
Sat Jul 03, 2021 4:36 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

This topic makes me think of a discussion here on a.net from maybe 10/15 years ago when, I think it was AA, updated the flap mechanism of their MD-80s to decrease drag. I was surprised that the pilots of the fleet were not aware of the change nor seemed to even noticed it happened. It's like the up...

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by Starlionblue
Sat Jul 03, 2021 4:34 am
Forum: Technical/Operations
Topic: Carry on baggage selecting at gate
Replies: 16
Views: 1868

Re: Carry on baggage selecting at gate

Packing light is a skill that takes practice. I pack light whichever bag I bring. I could pack a duffle bag but the wheelie spinner is just more comfortable. I can still easily lift it with one hand. The only time I need something bigger than a carry-on is for snowboarding trips. I do take your poin...

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by Starlionblue
Sat Jul 03, 2021 4:28 am
Forum: Technical/Operations
Topic: Why is the BAC limit for pilots higher than that of driving in the US states?
Replies: 12
Views: 2090

Re: Why is the BAC limit for pilots higher than that of driving in the US states?

There's also 91.17.a.2 which states "under the influence." So if you're >8 hours and <.04 but still feel like garbage, they count that. https://www.law.cornell.edu/cfr/text/14/91.17 Precisely. The overriding concern isn't the precise number of hours from the last drink, but your fitness t...

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by Starlionblue
Fri Jul 02, 2021 3:24 am
Forum: Technical/Operations
Topic: New FAA Standard Weights: A Summer and Winter of Fuel Stops?
Replies: 36
Views: 3513

Re: New FAA Standard Weights: A Summer and Winter of Fuel Stops?

So have the weights actually increased? Passengers have got fatter over the pandemic? Or is this purely the extra weight of the extra fuel that's required to be loaded based on the passenger weights, if so then can it really have that much impact tankering a bit of extra fuel? Even the 50seat plane...

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by Starlionblue
Wed Jun 30, 2021 5:00 am
Forum: Technical/Operations
Topic: Carry on baggage selecting at gate
Replies: 16
Views: 1868

Re: Carry on baggage selecting at gate

Was it a full load of pax? Maybe there wasn't enough room on board and the gate agent did indeed choose bags at random. Yes, 100% full. I am trying to find out why my suitcase got chosen, as others didn't. Hoping to avoid check in next time. ;-) Was your suitcase the maximum carry-on size? And did ...

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by Starlionblue
Wed Jun 30, 2021 2:53 am
Forum: Technical/Operations
Topic: Carry on baggage selecting at gate
Replies: 16
Views: 1868

Re: Carry on baggage selecting at gate

Was it a full load of pax?

Maybe there wasn't enough room on board and the gate agent did indeed choose bags at random.

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by Starlionblue
Wed Jun 30, 2021 2:39 am
Forum: Technical/Operations
Topic: Could a shorter person, say a person like 5 feet or something be a pilot?
Replies: 14
Views: 2176

Re: Could a shorter person, say a person like 5 feet or something be a pilot?

Apart from the military, there typically aren't any more requirements than "can reach the controls". A short person might have enough reach, or not, depending on individual physique. At the airlines, if there are any doubts they make you do a "reach test" during the interview pro...

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by Starlionblue
Tue Jun 29, 2021 1:49 pm
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

I suppose I did know that about the engine-driven pumps, but what about the electric pumps? Sounds like I need to add some more questions to the OTE database for you. The two EMPs are on the keel beam in the MLG, the yellow in the front and green in the rear. Technically there is an additional one ...

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by Starlionblue
Tue Jun 29, 2021 10:08 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

zeke wrote:
Starlionblue wrote:
I couldn't tell you exactly where they are located in the airframe.


They are not in the airframe, they are attached to the engine.


I walked right into that one. :lol: :white:

I suppose I did know that about the engine-driven pumps, but what about the electric pumps?

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by Starlionblue
Tue Jun 29, 2021 3:30 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

But - is this type of in-depth knowledge typical for a professional airline pilot? Of course, a certain knowledge is required to obtain the license & type rating, but would this required knowledge include these highly specialized topics? Or are the contributors in here just tech nuts like me wh...

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by Starlionblue
Tue Jun 29, 2021 12:30 am
Forum: Technical/Operations
Topic: Lightning Strike on 777
Replies: 17
Views: 3278

Re: Lightning Strike on 777

Hello Guys, Anyone can share with us what is the impact of a lightning strike on airplanes ? Just viewed this video and that was so impressive ! We can see a Boeing 777 of Air France having a lightning on final approach https://www.youtube.com/watch?v=jg8oCZw3Uyc Any inspections to be done ? Thanks...

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by Starlionblue
Tue Jun 29, 2021 12:28 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 3816

Re: How much does a typical airline pilot know about his/her aircraft?

Taking hydraulics as an example, I know which pumps exist and how to turn them on and off from the cockpit. I couldn't tell you exactly where they are located in the airframe. I know in general terms what each hydraulic system drives, at least when it comes to systems where it might be operationally...

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by Starlionblue
Mon Jun 28, 2021 2:46 pm
Forum: Technical/Operations
Topic: Control tower in uncontrolled airspace
Replies: 18
Views: 1564

Re: Control tower in uncontrolled airspace

As I see it, there are at least two ways to answer this. - A control tower can exist and not be operational during certain hours, for example at night. Hence uncontrolled but a control tower exists. - If a temporary tower is operational, you'd get a NOTAM making the relevant airspace controlled. Hen...

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by Starlionblue
Mon Jun 28, 2021 12:03 am
Forum: Technical/Operations
Topic: Lightning Strike on 777
Replies: 17
Views: 3278

Re: Lightning Strike on 777

If you're aware of the strike(s), you'd tell the engineer after parking. The aircraft exterior would then be checked for damage. Sometimes there are little holes. In many cases, speed tape is enough until a permanent repair can be performed. In other cases the radome might have cracked and needs to ...

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