Questions tagged [aircraft-maintenance]
Use this tag for questions pertaining to the maintenance of aircraft, including owner-performed maintenance and required inspections (annual, 100-hour, etc.)
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Are there any authority references showing how to track TSO/CSO?
The airlines that I worked for and I worked with has been tracking TSO value as same as TSN until the unit has been overhauled.
As far as I know this is the common practice and there should be some ...
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How high can oil pressure go on a 737 MAX?
I'm attempting to simulate the EICAS page on the 737 MAX MFD, and I'm researching some limits for the engine based on the FCOM. I've been able to find information at the 737 Tech Site on the lower ...
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what is the lower pressure plate in the swashplate assembly? is it the same as the lower stationary swash plate? or is it the drive scissors?
Im looking at the rotor assembly of a BlackHawk. The natops manual states the following, "...The lower pressure plate, in conjunction with the main shaft nut, secures the shaft extension to the ...
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FAR 91.411 and 91.413 pitot/static and transponder tests when overseas
I own an N-registered aircraft and am overseas with it. The aircraft requires compliance with FAR 91.411 and FAR 91.413. In looking at the FAA database for repair stations, I don't see a station ...
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How to clean up CA1000 corrosion inhibitive compound?
I am working on one of the aircraft parts covered in CA1000 corrosion inhibiting compound that needs to be cleaned and reapplied. I looked at their website and it says it is "a one-part, epoxy ...
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Why aren't we using forward swept wings in commercial airliners? [closed]
What are the advantages and disadvantages of doing so.
Is there any practical problem in execution?
Provide some experiments for examples.
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What is the purpose of pipes that are sticking out of the Boeing 747 FWD Cargo door?
I went to visit an Aviation museum recently and noticed these pipes that are sticking out of a Boeing 747 in the FWD Cargo bay...
What are these pipes called and what is the purpose of them?
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Airplane Owner, But don't have PPL. Can student pilot do oil change on their own plane?
Airplane Owner, But don't have PPL. Can student pilot do oil change on their own plane? I can't seem to find answer on this. Any helps would be great.
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Why B737 CFM56 engine sounds like heavy wind sound at Throttling up?
14:14 ~ 14:21 : Throttle Up (with heavy wind sound
14:22 ~ 14:23 : Engine reached certain %, and no heavy wind sound
14:23 ~ : Throttle Up (with heavy wind sound)
I always wonder why only B737NG with ...
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How and when are cockpits cleaned?
It's well known that cleaning the cabin of an airliner in the short time it is on the ground can be a challenging task for the cleaning crew.
But what about the best seats in the plane, the cockpits? ...
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Multiple annual inspections failed to find a problem that is now showing up - is there any recourse? [closed]
I purchased a 1977 Cessna 150M about 3 years ago. The aircraft is currently undergoing an annual inspection.
The inspector has determined that the engine serial number does not match the engine ...
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Most Efficient Commercial Aircraft Design? [closed]
What was the most efficient aircraft design (based on factors such as lift, drag, and fuel consumption) but not developed or scrapped due to issues with long term viability and maintenance, operations ...
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How to calculate EGT Margin for P&W engines (PW1100g) ? (Theta parameter correction)
My goal is to obtain engine baselines and calculate EGT Margin for Pratt&Whitney PW1100g engines (specifically, PW1133GA-JM)
I have a large dataset of engine reports recorded during takeoff. I ...
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Radome replacement process for radome damaged by bird strike
Suppose a flight has a bird strike which requires the radome to be replaced. The aircraft is grounded at Chennai (MAA), India. What is the process of its replacement? Where will the new randome come ...
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Overflying the 100 hour when airplane is not for hire
Suppose I have a 100 hour inspection at 2000 hours total time. From 2100 to 2190 the aircraft is not being operated for hire. If I then have a 100 hour inspection at 2190, when is the next due?
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Why are British Airways wings so dirty?
I often fly through Heathrow, and British Airways airplanes, particularly their 777s, always look so dirty. For example, there is often a kind of dark oily stain on the wings and flight surface. So - ...
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Passenger window insert pops out mid-flight
I was on a domestic flight from DCA to ORD in December on an Airbus A319. I was in row 31 and two rows ahead of me on the left side of the plane, I noticed while deplaning at ORD the passenger window ...
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Why does the typical magneto switch have R on the left and L on the right?
I can't think if I've ever seen this be done with the L on the left and theR on the right. Even on my Rotax 914, which is, *ahem*...
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For transporting 4000kg of cargo via Mi-17 helicopter for 54 km, how much maintenance cost per flight hour will be incurred?
In a disaster response case study, I am using Mi-17 helicopters for relief supplies transportation in a challenging logistics environment.
Regarding this, I want to check my estimates with the actual ...
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Reasons for ADSB PAPR Report Altitude Errors
We have just test flown a new 1090 ADSB installation, using Apareo Stratus ESG Transponder, which has internal GPS.
The PAPR for the test flight show both Baro Alt and Geo Alt errors in the Missing ...
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Is 14.29 volts too strong for a 14V DC chronograph?
I've bought a Davtron model 811B aircraft clock (14 Volts), but my power source when measured with an accurate multimeter, reads exactly 14,29 Volts. Is that a problem? I mean is that tension (14,29 V)...
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Do I need any authorization to work and sign out performed maintenance on US-registered general aviation aircraft outside of USA? [duplicate]
I'm non-USA citizen and holder of FAA A&P Mechanic's certificate but haven't worked on US-registered aircraft since 1999 however all this time I'm involved in commercial aircraft maintenance and ...
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Why might using flaps trip the breaker on a Cessna 172G?
Why does the breaker keep tripping when I try to use the flaps in my 1965 Cessna 172G? It’s a 15 amp breaker. After I reset the breaker, the flaps will go up but then the breaker trips when ...
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Difference in AMP and MPD between two aircrafts
Can two aircrafts such as the A320 and A330 have the same Maintenance Planning Document but different Aircraft Maintenance Program?
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Is Aeroflot flying airliners without brakes?
I have just read the news that the Russian flag carrier Aeroflot has deactivated the brakes on nine of its aircraft. Not to dismiss the journalistic talent behind these reports, but could it be that ...
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Does flying a plane mid-annual inspection somehow reset the inspection?
(This question concerns only an airplane which does not have an expired annual.)
Let's say that the IA started an annual, lubed some joints, inspected some parts, and then, for whatever reason, flew ...
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How would you know if there was an AD issued for an aircraft?
How would I know if an AD was issued?
Is this information only given to owners of the aircraft? Or must you sign up with the FAA or Manufacturing company to get emails about that sort of thing?
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COM Transceiver problem and SWR test
I have a VHF COM problem. I have a new composite structure aircraft (a Berkut) with an older VHF transceiver, (a Bendix King KX-155 TSO), that has significantly reduced range in certain situations. ...
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What, if anything, could actually cause one helicopter blade to be more eroded than the others?
Does this scenario in which one blade is more eroded then the others commonly occur with real helicopters? Even if it does, Julio's explanation is obviously wrong; what actually causes it?
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Why did older versions of B747 use radioactive material?
What was its purpose and in which part of the aircraft was it being used?
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Where are aeroplanes sent to if they are not be used for periods more than 3 years?
We were looking at the type of facilities and the sort of suitable environments/and or conditions for aircraft storage and a part from "indoor" it was mentioned that places that are humid is ...
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Authorization of repairing engine blade nicks
Since blade nicks repair considered as a major repair, I would like to ask,
1- Who is authorized to repair engine blade nicks?
2- Could a mechanic with powerplant rating do the repair?
3- Could a ...
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soot on a plane
This is the nacelle (?? I guess, I'm just someone who takes plane trips ??) of a DeHavilland Dash 8-400 that I flew on (as a customer) from Toronto to Boston last week. I noticed the soot around the ...
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Can you weld a propeller blade from 120 degrees to 180?
My uncle flew for Mission Aviation Fellowship (maf.org) for a university in Texas, and I believe that he was flying a Cessna to the Amazon (among other places). He actually knew Jim Elliot (who went ...
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twist correction of fan blades
How can the blade's angle be effectively adjusted to meet prescribed tolerances during shop repairs?
I am conducting a research paper on aircraft engine blade maintenance, and I have encountered ...
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Can I fly a checkride with inop vacuum indicator and attitude indicator in a TAA plane?
I have a checkride coming up and I will be taking it in a TAA plane. The vacuum indicator and attitude indicator are both inop and marked as so, but was wondering if it is still okay to fly for a ...
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Statistically, Is engine calendar TBO honored more in the breach or the observance?
Surprisingly to me, Lycoming and Continental engines have a recommended overhaul interval (TBO) of 12 years, while Rotax engines have a 15-year TBO. This suggests that engines should undergo frequent ...
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What is required to get back into aviation?
I stopped working as an airframe & powerplant mechanic back in December 2010 to pursue other goals. I still have my A&P but have not been active in aviation since then, I’m considering going ...
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What does Line imply in Line Replaceable Unit?
Does line indicate the aircraft is lined up in hangar (!) and maintenance crew can replace it?
Or does it mean something else?
Wiki talks about operating location and distances.. What is that?
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What is proper procedure for entering iterative test flights into the aircraft's logs?
Let's say that I'm working on a problem which requires in-flight troubleshooting in an iterative process of multiple flights, for instance working on engine cooling baffles. Does each iteration, no ...
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Is it against the regualtions to install a dummy set of landing gear during aircraft maintenance?
We will be removing a set of landing gear for overhaul, so we are arranging a set of unserviceable landing gear to keep the aircraft mobile.
I would like to know if doing so is against any FAA or EASA ...
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What to do when an AD is published but your aircraft is nowhere near a maintenance facility?
If an Airworthiness Directive is published for your aircraft which makes it illegal to operate until complied, and your aircraft is sitting in the Alaskan wilderness with the closest facility hours ...
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Is silk thread still being used to prevent oil loss from Lycoming engines?
A teardown/rebuild video of a Lycoming O-360 showed the mechanic laying silk thread along a path where 2 engine parts were to be bolted together$^1$. This would be, in addition to a gasket, to ...
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Why did my flight leave the gear down for the first 10 minutes of flight? [duplicate]
This morning, I took flight VS156 from LAS to LHR, aboard a 787, tail number G-VSPY according to flightradar24. The pilot made a strange announcement before takeoff - specifically, that due to a ...
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What is this hole at the bottom of the DA40NG body?
This is the bottom of the fuselage of a DA40NG aircraft and where the right wing attaches to the fuselage. What is the thing I'm pointing at with the red arrow in the picture?
As it is written in the ...
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FMC and MCDU not talking
I have a test bed in which the FMC and MCDU are hooked up to one another.
FMC menu was populated on MCDU and was able to be navigated.
After making some changes to the FMC GPS #2 lines, the FMC ...
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Is there historical evidence whether or not FAR §21.9 applies to owner-manufactured avionics?
Looking at an explanation of §21.9 (formerly §21.303(b)2), it seems very straightforward for an owner to produce a part for an ...
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Why is this placard on a Boeing 737 NG?
I was working on the cockpit of a Boeing 737 and was intrigued when I saw this placard. From what I know this has to do with Citibank being a lender or something along those lines.
Why would this be ...
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Faults on Gulfstream G550/C-37B repairable in < ~3hrs without aircraft specific tools or spares?
Endeavouring to meet your requirements for specificity. brevity, question as title, etc.
I am an author seeking a realistic fault/issue for a Gulfstream G550/C-37B meeting the following criteria:
1/ ...
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How dangerous (or not) are some synthetic types of aviation hydraulic fluids based on organophosphates?
Insider's January 13, 2023 Gerard Butler says he mistakenly rubbed acid all over his face while filming 'Plane' and didn't realize until he was 'burning alive' links to the Late Night with Seth Meyers ...
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