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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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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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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Vis-a-vis maintenance and spare parts, what are a type certificate holder's "regulatory obligations"
This conversation came up when the owner of an out-of-production airplane from a still-in-business manufacturer lost his gas cap. The manufacturer didn't have a spare part and refused to take an order ...
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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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Can I become an aircraft technician if I have color-blindness?
Are there any restrictions imposed by any aviation-authorities that would prevent a color-blind person from becoming an aircraft technician?
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I need help with this dent classification rule
I'm an Aerospace Engineer from Chile, and I have the following reference issue:
Supposedly there's a damage rule related to dents on aircraft skin that says
If the distance between two dents is lower ...
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What kind of maintenance is involved when an airframe has been overstressed (E.g. an F/A-18)?
In the movie Top Gun 2, the main character Over-Gs his aircraft (I think, an F/A-18 Hornet to around 10G).
From a maintenance perspective, what steps have to be additionally performed in order to get ...
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FAA and Military - Maintenance Certification
My name is João, I'm from Brazil, and I'm researching certification of maintenance companies (aeronautics), more specifically about military certifications.
In Brazil, we have an agency to certify ...
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Recording tach solutions for a tachometer generator
I am most familiar with cable driven recording tachometers. I have a tach-generator on a continental IO-470, which has been driving a two-hand tachometer with no time recording feature. I would like ...
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What are the procedure for a B747-400 wheel change?
And what are the required tools? I am fascinated by how you do a B747-400 wheel change.
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Are maintenance manual airframe lifetime limitations binding?
An IA told me that component lifetime limitations, even when published in the Airworthiness Limitations section of the service manual, are not binding. They can be ...
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What does the Permanent Magnet Alternator do exactly and how works?
From T6b Naval manual:
A dedicated permanent magnet alternator (PMA), mounted on the reduction gearbox, powers the PMU. The PMA supplies 32 VAC, which the PMU converts to DC. The PMU automatically ...
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where is the centrifugal force the flyweights experience coming from?
The T6b uses a PT6-68 engine which has a variable pitch, constant speed, feather, and non-reversible prop system. There is only one lever in the cockpit which regulates Torque and the Power Management ...
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How is an x-ray image taken of a combat airplane?
At 7:31 in the following Youtube video (the link should start at 7:31, t=451):
There is an x-ray image being shown, of (I presume) part of the guts of an F-15.
How are ...
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Is the the cost of taking a passenger jet out of long-term storage for two years significantly more than a C check?
There are separate procedures for "parking" (short-term storage) and "storage" (long-term storage), as Airbus calls them; this question is about the latter. Assume that close to ...
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Will ice on an airfoil work as a vortex generator?
Vortex generators are little fans that generate vortex to attach flow to an airfoil and delay stall. If frost or ice are formed on an airfoil, technically they also generate turbulence and vortex,I am ...
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Why should an overheated wheel be approached from the front/back and not in line with the axle?
According to the CAAIP
(Civil Aircraft Airworthiness Information and Procedures):/
10.4 Tests have shown that the safest extinguishant to use is a dry chemical agent and this
must be used whenever ...
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Can I work in USA aviation maintenance without U.S. citizenship? [duplicate]
I am currently working outside of the US but have all the aviation maintenance degrees, and I am moving to the US.
Can I work in the USA if I don’t have citizenship?
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How do jet engines generate electrical power?
I am interested in understanding how electric power is generated in Jet engines. If a pilot continuously keeps altering the throttle to suit the flight requirements, how does the jet engine maintain ...
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ENGINE OIL SYSTEM SERVICING IN A318/A319/A320/A321 - ENGINE IAE-V2500
12-13-79-610-011-A - Check Oil Level and Replenish.
Reason for the Job:
This task gives the instructions necessary to fill the engine oil tank
if the oil level has decreased during normal engine ...
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Why can the rear rotors of helicopters move freely in this direction?
As you can see in the video in the imgur link below i recorded a video of the Alouette 2 rear tail rotor and as you can see it moves freely in that direction. Why does it freely move in that ...
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who can do an overhaul of landing gear?
A manufacturer requires the landing gear of an aircraft to be overhauled at a 10 year interval.
Can any maintenance facility perform this work or does it need to be an approved facility.
This is for a ...
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