Search found 260 matches

by unimproved
Thu Jun 03, 2021 4:03 pm
Forum: Technical/Operations
Topic: UA 752/3 and 763 CRT displays
Replies: 17
Views: 4930

Re: UA 752/3 and 763 CRT displays

They are repaired by specialists in a shop, the original CRTs on our 747s are still in use. If one breaks there are enough spares from airlines who upgraded or scrapped frames.

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by unimproved
Sun May 16, 2021 11:35 am
Forum: Technical/Operations
Topic: Iran Air 747 Combi ?
Replies: 22
Views: 4608

Re: Iran Air 747 Combi ?

Very interesting, thanks for the additional photos, I don’t think many convertibles were made Fascinating to look inside on these freighters and see overhead bins installed inside the swing nose itself They were truly ‘ready for anything’ ! And unique I think to see one with a -400 wing to body fai...

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by unimproved
Mon Apr 19, 2021 6:12 pm
Forum: Technical/Operations
Topic: Is it possible to access the cargo compartment from the passenger compartment?
Replies: 52
Views: 12607

Re: Is it possible to access the cargo compartment from the passenger compartment?

BubbleFrog wrote:
We were once stuck on the tarmac in a 744, and somebody came into the cabin by way of the nose wheel and through a hatch on the cabin floor. Can anyone enlighten me how that worked?

Climb on the nose strut, open avionics door, climb up. Repeat for the cabin floor hatch.

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by unimproved
Thu Apr 08, 2021 5:41 pm
Forum: Technical/Operations
Topic: Which planes run out of engine hours first
Replies: 17
Views: 5459

Re: Which planes run out of engine hours first

Thanks. OK. So a CRJ is a likely candidate where it is due it's N.th expensive engine overhaul which is enough to send it to a scrapper. Any turboprops similar to that? Is there a time on an ATR 42 or Q300/Q400 where the cost of investing in an engine overhaul isn't economically justifiable for an ...

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by unimproved
Mon Apr 05, 2021 10:06 am
Forum: Technical/Operations
Topic: Question for (Russian speaking?) Mil-Mi-2 chopper experts
Replies: 5
Views: 2257

Re: Question for (Russian speaking?) Mil-Mi-2 chopper experts

No problem. Just asked a helicopter pilot friend of mine. This isn't the serial number of the aircraft, this is the drawing number for this exact part. In this case this seems to be a "jack" (to lift the helicopter). Think of it as a hyperlink, 1960's style. You don't wanna waste all day ...

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by unimproved
Thu Mar 25, 2021 7:48 pm
Forum: Technical/Operations
Topic: APU Fire test on Boeing 777
Replies: 3
Views: 1884

Re: APU Fire test on Boeing 777

You need to turn on the standby power switch (located left upper side of the overhead panel) to main battery. This turns on the cockpit avionics and allows you to do the fire test.

At least, that's how it works in real life.

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by unimproved
Wed Mar 24, 2021 7:22 pm
Forum: Technical/Operations
Topic: Aircraft Maintenance License
Replies: 4
Views: 1707

Re: Aircraft Maintenance License

Lpbri wrote:
It all depends what country you are in. I don’t know what category “A” or “B” is.

IIRC it's the same as in EASA, A is line, B is ground engineer/certifying staff, C is base maint supervisor.

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by unimproved
Wed Mar 24, 2021 1:19 pm
Forum: Technical/Operations
Topic: Aircraft Maintenance License
Replies: 4
Views: 1707

Re: AIRCRAFT MAINTENANCE LICENSE

As an ordinary technician you're basically a paid intern doing work while being supervised.

I'd take the Cat B right away, as it doesn't differ too much in cost and allows you to grow further.

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by unimproved
Fri Mar 19, 2021 6:34 pm
Forum: Technical/Operations
Topic: Why are engines on planes changed so often?
Replies: 18
Views: 3894

Re: Why are engines on planes changed so often?

IFlyVeryLittle wrote:
Doing it by the book, how long to remove an engine? How long to replace one?

747 is 3 shifts (24h) including inlet and exhaust swap. Most time consuming part is lining up the new one with the pylon and bolts.

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by unimproved
Thu Mar 18, 2021 4:37 pm
Forum: Technical/Operations
Topic: Parting out retired aircraft
Replies: 14
Views: 2159

Re: Parting out retired aircraft

Don't know where else to ask this question and I don't want to bump any old threads, so I just wanted to ask why the A380s that have been scrapped so far have all been painted all-white before their destruction. Apparently it has to do with leasing agreements, but there have been plenty of examples...

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by unimproved
Mon Mar 15, 2021 9:24 pm
Forum: Technical/Operations
Topic: Exit Limits on 737 and A320
Replies: 4
Views: 1548

Re: Exit Limits on 737 and A320

IIRC, the "service" side has smaller doors than the pax side.

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by unimproved
Sun Mar 07, 2021 4:29 pm
Forum: Technical/Operations
Topic: Airbus Wing Hook Symbol
Replies: 2
Views: 1308

Re: Airbus Wing Hook Symbol

Points to secure a fall harness to.

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by unimproved
Fri Mar 05, 2021 4:01 pm
Forum: Technical/Operations
Topic: Can the IRS be aligned in an hangar?
Replies: 7
Views: 1536

Re: Can the IRS be aligned in an hangar?

Yes, and it's also required for quite a few procedures. WX radar can be tested with the area in front of it blocked off.

GPS can be a bit annoying to do inside, as it fails the ADS-B test without a fix on both rx.

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by unimproved
Sun Feb 28, 2021 3:15 pm
Forum: Technical/Operations
Topic: Fedex 777 EFVS
Replies: 8
Views: 1778

Re: Fedex 777 EFVS

Pretty much the entire Fedex fleet has it, starting with the MD10. It's the little bump on the radome.

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by unimproved
Thu Feb 25, 2021 1:47 pm
Forum: Technical/Operations
Topic: Delta Weber Cirrus Seat Power
Replies: 1
Views: 724

Re: Delta Weber Cirrus Seat Power

No way to make the originals work easily. I'd look up what the actuators use and just make a manual control box for that voltage.

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by unimproved
Wed Feb 17, 2021 6:37 am
Forum: Technical/Operations
Topic: How do passenger windows get so scratched up?
Replies: 7
Views: 2136

Re: How do passenger windows get so scratched up?

Sand and dirt hitting it at high speed. Paint also starts stripping from rivet heads and panel edges due to that.

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by unimproved
Mon Jan 25, 2021 3:10 am
Forum: Technical/Operations
Topic: A320 battery switches
Replies: 15
Views: 2468

Re: A320 overhead panel

You need DC for the external power control unit (which checks voltage and frequency). Without it the contactor won't close as that'd mean putting an unknown source into the system.

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by unimproved
Thu Jan 21, 2021 8:05 pm
Forum: Technical/Operations
Topic: Hypothetical: Engine failure on trijet retirement ferry flight
Replies: 15
Views: 2813

Re: Hypothetical: Engine failure on trijet retirement ferry flight

I'd land ASAP unless you shut down that engine yourself with a clear reason. Can never be sure if it was a contained failure (next to tail hydraulics) or if there's a fire brewing.

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by unimproved
Wed Jan 20, 2021 9:52 am
Forum: Technical/Operations
Topic: Why was N106US the a320 involved in the hudson river ditching never repaired?
Replies: 30
Views: 5233

Re: Why was N106US the a320 involved in the hudson river ditching never repaired?

Engines were a write off, electronics drowned, and lots of structual issues. At that point it's cheaper to start looking at the second hand market.

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by unimproved
Mon Jan 18, 2021 8:09 pm
Forum: Technical/Operations
Topic: What are some lesser known differences of 1st generation Boeing 777 and 2nd generation of Boeing 777?
Replies: 17
Views: 4491

Re: What are some lesser known differences of 1st generation Boeing 777 and 2nd generation of Boeing 777?

Ziyulu wrote:
The 2nd generation's seat belt lights have green arrows instead of red arrows.

They're also LED instead of normal light bulbs.

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by unimproved
Sun Jan 17, 2021 8:27 pm
Forum: Technical/Operations
Topic: Boeing 737 Engine Bleed Precooler System Defiency
Replies: 5
Views: 1351

Re: Boeing 737 Engine Bleed Precooler System Defiency

It won't lead to a plane falling from the sky during icing, but it will make the anti ice slightly less effective.

Not having an indication is the result of using an ancient design. Newer models do have the indication (but will only show it when it's in an unexpected position).

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by unimproved
Fri Jan 15, 2021 7:47 am
Forum: Technical/Operations
Topic: “Line up and wait”
Replies: 38
Views: 4171

Re: “Line up and wait”

Line up and wait means turn onto the runway and stop there. If they are already taking off ATC would file a report.

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by unimproved
Sat Jan 09, 2021 11:03 am
Forum: Technical/Operations
Topic: Certification issue
Replies: 1
Views: 649

Re: Certification issue

At least for EASA it requires a year of civil experience, in which you build the logbook. That gives you either a B1 or B2 depending on which one you have in the military.

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by unimproved
Wed Dec 30, 2020 3:58 pm
Forum: Technical/Operations
Topic: BA B744 RB211 engines
Replies: 11
Views: 2195

Re: BA B744 RB211 engines

Remaining life is money, even if it isn't worth much in the first place. Engine swapping on a 747 is a one day job anyway.

Might be converted to other RB211 variants too.

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by unimproved
Tue Dec 29, 2020 3:39 pm
Forum: Technical/Operations
Topic: FedEx/UPS Flight Numbers
Replies: 6
Views: 1696

Re: FedEx/UPS Flight Numbers

UPS 1-1999 1DA/International Flight 2000-2999 2DA 3000-3999 AD-Hoc 1DA Flights 4000-4999 AD-Hoc 2DA Flights 5000-5999 USPS Flights 6000-6999 Cargo Flights It gets a little more complicated after that, but I can’t remember it off the top of my head. 9000 series are a mix of maintenance and ferry fli...

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by unimproved
Tue Dec 29, 2020 8:10 am
Forum: Technical/Operations
Topic: 747-400 vs 737 winglet size
Replies: 10
Views: 3188

Re: 747-400 vs 737 winglet size

The 747 has a different design, comparable to the MD11 and A330. It's total surface area that counts, and 737 winglets are a lot smaller at the tip.

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by unimproved
Fri Dec 25, 2020 6:57 pm
Forum: Technical/Operations
Topic: Airline catering question.
Replies: 16
Views: 2757

Re: Airline catering question.

For low cost carriers with buy-on-board offerings, it isn't unheard of that items stay on the plane for weeks, months or even years. It happens alarmingly often that passengers find food way past the expiration date on the European LCCs. Here's one where EasyJet served up a 10 year old sandwich: ht...

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by unimproved
Thu Dec 24, 2020 11:38 pm
Forum: Technical/Operations
Topic: Airline catering question.
Replies: 16
Views: 2757

Re: Airline catering question.

For low cost carriers with buy-on-board offerings, it isn't unheard of that items stay on the plane for weeks, months or even years. It happens alarmingly often that passengers find food way past the expiration date on the European LCCs. Here's one where EasyJet served up a 10 year old sandwich: ht...

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by unimproved
Sat Dec 19, 2020 4:11 pm
Forum: Technical/Operations
Topic: Do cargoliners have locked cockpit doors? Or cockpit doors for that matter?
Replies: 26
Views: 3955

Re: Do cargoliners have locked cockpit doors? Or cockpit doors for that matter?

No normal cockpit doors, but on the 747 there is a locked door to the upper deck.

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by unimproved
Sat Dec 19, 2020 11:52 am
Forum: Technical/Operations
Topic: Questions on how to become a pilot and training
Replies: 128
Views: 3315

Re: Sports and flying

Why professional Red Bull Air Race pilots can combine pilot work, but other professional sports cannot? And there are pilots here who combine extreme sports? How risky is it to do it so as not to get injured and bruised and leave your flying career? How to be careful and should you throw? Need advi...

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by unimproved
Thu Dec 17, 2020 12:40 am
Forum: Technical/Operations
Topic: Entry level widebody
Replies: 2
Views: 1332

Re: Entry level widebody

Nothing about being simple, it was just tiny for a widebody.

Demand has gone up since then, so seats on a bigger design can now be filled as well.

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by unimproved
Wed Dec 16, 2020 11:46 am
Forum: Technical/Operations
Topic: Type Certificate from 767-300 to 767-300ER
Replies: 17
Views: 3611

Re: Type Certificate from 767-300 to 767-300ER

N965UW wrote:
I also think that the winglet STC is only good for the -300ER, and the -300 was never certified for them. Plus the -300ER has a higher optional MLW of 320,000 lbs.

It's probably more of a real world problem with the different wing than a paper certification thing.

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by unimproved
Sun Dec 13, 2020 8:17 am
Forum: Technical/Operations
Topic: Questions on how to become a pilot and training
Replies: 128
Views: 3315

Re: How to become a pilot of warbirds?

Pretty much the only guys doing these things are retired airline pilots or air force vets. Usually without getting paid for it.

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by unimproved
Fri Dec 11, 2020 11:47 pm
Forum: Technical/Operations
Topic: How much hydraulic pressure does the APU provide vs the engines?
Replies: 12
Views: 2521

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

Brakes are almost entirely pressure driven and require very little fluid flow (volume). As stated, aircraft run constant pressure hydraulic systems. Flow rate (ie volume) through the pump / system depends on the “demand”. Brake demand is next to nothing. Further, the demand is consumed from the acc...

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by unimproved
Sun Dec 06, 2020 12:22 pm
Forum: Technical/Operations
Topic: How could Lufthansa fly a 747 into La Paz/Bolivia located at 13'000 ft?
Replies: 16
Views: 4465

Re: How could Lufthansa fly a 747 into La Paz/Bolivia located at 13'000 ft?

No, it begins after lift-off, aside from normal small pressure, 0.125 PSID, IIRC, on taxi. The cabin descends to the normal scheduled altitude for the flight. If going from Quito to Guayaquil, it’d start right down toward sea level as it’s a short flight. If Quito to MIA, it’d descend to normal cab...

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by unimproved
Thu Dec 03, 2020 7:01 pm
Forum: Technical/Operations
Topic: Amazon Prime Freighters: Standardized MTOW(s)?
Replies: 10
Views: 2066

Re: Amazon Prime Freighters: Standardized MTOW(s)?

tb727 wrote:
Second-hand freighter fleets are standardized fleets until the 2nd airplane shows up!

Always loved those airlines with a different AMM for every tail. Or different engine types on the same model.

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by unimproved
Thu Dec 03, 2020 6:08 am
Forum: Technical/Operations
Topic: A350 Fuel Tanks
Replies: 16
Views: 2665

Re: A350 Fuel Tanks

I'm told that the A350 "has more fuel capacity than can be filled" but that a software update allows certain frames to use this extra capacity. And that most A350s are flying around with more space for fuel than is allowed by the software to be filled, even beyond weight and center-of-gra...

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by unimproved
Thu Dec 03, 2020 12:01 am
Forum: Technical/Operations
Topic: A350 Fuel Tanks
Replies: 16
Views: 2665

Re: A350 Fuel Tanks

When the A350 came into service it had a 268 tonne MTOW, today’s aircraft are capable of 280 tonnes. At its initial MTOW there was no point increasing the certified maximum fuel loaded, with the increased MTOW there is so they changed the fuel system and flight control software that allows increase...

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by unimproved
Sun Nov 29, 2020 7:51 pm
Forum: Technical/Operations
Topic: Amazon Prime Freighters: Standardized MTOW(s)?
Replies: 10
Views: 2066

Re: Amazon Prime Freighters: Standardized MTOW(s)?

Thanks to all for the answers! What happens if there is a specific load that day that is greater than the specific tail number's performace specs? Does that ever happen if the aircraft performance can vary? Weight is almost never an issue, with all the packaging it reaches volume way before that. E...

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by unimproved
Sun Nov 29, 2020 11:23 am
Forum: Technical/Operations
Topic: How Do Desert Conditions at DXB Affect Aircraft Engine Life?
Replies: 2
Views: 1484

Re: How Do Desert Conditions at DXB Affect Aircraft Engine Life?

Sand is also an enemy to any moving parts, to the point where some aren't greased on frames operating in Africa.

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by unimproved
Wed Nov 25, 2020 12:48 am
Forum: Technical/Operations
Topic: Onboard Weight and Balance System
Replies: 8
Views: 3175

Re: Onboard Weight and Balance System

It contains a display, weight computer, and pressure sensors on the gears. Pretty much works with "if the nose gear is getting lighter something is being added behind the main gear".

And you'll very much know it is installed when changing a nose wheel since it trips a very loud alarm.

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by unimproved
Fri Nov 20, 2020 7:32 am
Forum: Technical/Operations
Topic: In house operations operated by airline at foreign stations in 2020?
Replies: 4
Views: 1261

Re: In house operations operated by airline at foreign stations in 2020?

A lot of airlines share with alliance partners at outstations. Usually a supervisor and maintenance with the rest being done by a ground handler.

Passenger experience is only really affected by check in and boarding, if anything else fails it's blamed on the airport anyway.

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by unimproved
Thu Nov 19, 2020 8:15 pm
Forum: Technical/Operations
Topic: Installed Engine Attitude
Replies: 32
Views: 2763

Re: Installed Engine Attitude

Hi All, Thanks for your responses, some interesting observations and debate! The engine attitude I was referring to in the original post was from the perspective of looking forward down the length of the plane. As can be seen on this image below there does appear to be a left engine vs right engine...

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by unimproved
Thu Nov 19, 2020 6:42 pm
Forum: Technical/Operations
Topic: Operation question B767-300F
Replies: 3
Views: 1255

Re: Operation question B767-300F

They're a good fit because no passenger operator wants them (cheap to buy) while still having enough parts supply.

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by unimproved
Wed Nov 18, 2020 8:31 pm
Forum: Technical/Operations
Topic: Installed Engine Attitude
Replies: 32
Views: 2763

Re: Installed Engine Attitude

The engine is identical on both wings. During install they're rotated a few degrees by pulling them against the wing mount.

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by unimproved
Mon Nov 16, 2020 4:50 pm
Forum: Technical/Operations
Topic: Ground pin on power sockets
Replies: 12
Views: 2440

Re: Ground pin on power sockets

I think the easiest way to explain it is by thinking of a 12v inverter plugged into your car. The neutral/ground for the inverter is the car frame, while any ground safety devices are contained in the inverter itself. In seat power is usually part of the IFE system box which also shuts it off at hig...

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by unimproved
Thu Nov 12, 2020 12:59 pm
Forum: Technical/Operations
Topic: Questions on how to become a pilot and training
Replies: 128
Views: 3315

Re: Parallel profession

If the company agrees and he has the required skills, yes. Same way a mechnic might do engineering too. Or FA's who do office work.

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by unimproved
Tue Nov 10, 2020 2:35 pm
Forum: Technical/Operations
Topic: 777x vs 787
Replies: 9
Views: 2567

Re: 777x vs 787

Does the 777x employ the composite body, very flexible wingtips(not sure what they're called), bleedless system as well as other features such as electronic window dimming and whatnot? Or is it more like a legacy 777(I know MAX has a more similar build to the 737NG than the state of art 787)? I kno...

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by unimproved
Sun Nov 08, 2020 8:21 am
Forum: Technical/Operations
Topic: Ground pin on power sockets
Replies: 12
Views: 2440

Re: Ground pin on power sockets

The 115v400hz system uses the frame as neutral. IIRC the in seat power is fully contained per seat row.

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by unimproved
Wed Nov 04, 2020 8:22 am
Forum: Technical/Operations
Topic: Before primary flight displays, where were their contents displayed?
Replies: 17
Views: 2095

Re: Before primary flight displays, where were their contents displayed?

Max Q wrote:
Display of AOA could have been provided via a separate analogue gauge but rarely was, airlines didn’t see a need and weren’t going to pay extra for it

I guess we were te exception to that.

But hey, some 747 classics were even upgraded to a basic glass cockpit some years before they were retired.

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