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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Can short term escalation be applied exceeding life limit on Form 8130-3?

I have a case where there is maintenance item to replace a component when it reaches its life limit. This component life limit is stated on Form 8130-3 of said component referring to component manual. ...
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2 votes
2 answers
213 views

Difference between Maintenance planning document(MPD) and Maintenance Manual (AMM)

Could someone explain to a layman, relatively new to Aviation maintenance, the difference between the Maintenance planning document(s) (MPD) and the Maintenance manual (AMM). Is one a subset of the ...
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Could a Continental R-670 piston engine run with regular car gasoline?

I know that the minimum octane for the R-670 is 65 octanes (W670-K variant). I also noticed that other variants increase compression ratio and power using a minimum of 80 octane. Why there is an ...
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2 votes
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Can an EASA Part 66 AME License be accepted by the FAA?

I am holder of an EASA Part 66 AME License (Category L3H / hot air balloon). Can it be accepted by the FAA so that I would be allowed to do maintenance and annual inspection of American-registered ...
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2 votes
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Which time zone applies for annual maintenance?

(This question is silly, but fitting for the end of the month.) When is the latest that a plane owner can legally fly a plane which is due for annual at the end of the month? Is it 23h59m UTC on the ...
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17 votes
1 answer
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What does the abbreviation "SCMOH", related to an engine overhaul, mean?

Scrolling through controller.com. I noticed this, "121.3 SCMOH". Does anyone know what this means?
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-2 votes
1 answer
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What kind of feedback is this?

i found this link that shows a united airlines intercom feeding back and i was just wondering how typical is this on these flights?? i’ve never heard feedback come back frequently every time the ...
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6 votes
1 answer
888 views

What would cause a Cessna 182T G1000 to show red X's on Manifold, Fuel, M & S Batt Amps?

Our 2006 Cessna 182T G1000 suddenly started showing the following X's on Manifold, Fuel, and M/S Batt Amps. You can see in the second photo, that the batteries are charging when the plane is started. ...
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12 votes
6 answers
5k views

Does this fuel leak from the carburetor of a Cessna 172E need immediate maintenance?

Consider: I'm concerned with a fuel leak I've developed on my Cessna 172E in the past three weeks and appears to be coming from the carburetor. There is even some fuel in the air breather near the ...
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Are MPD tasks with FEC 6 or 9 mandatory to be included in the maintenance programme? Can they be ignored?

As per the title. FEC 6 or 9 is classified as non safety related. Can those tasks be excluded from the maintenance programme?
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3 votes
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Are Airbus A320 Cabin Door Exterior & Interior Levers Linked?

Was looking at this video on Airbus A320 Cabin door procedures and was wondering if the exterior door lever is mechanically linked to the interior lever? It seems as if the exterior lever will open ...
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How to troubleshoot a noisy aircraft engine driven hydraulic pump? [closed]

I understand that engine driven hydraulic pump noise is caused by several reasons such as cavitation,aeration or mechanical defects but how to troubleshoot this problem using a flowchart from any ...
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Who is responsible for maintenance and eventual design changes for planes that the manufacturer has gone broke?

Sorry for the wrong vocabulary, I am not someone from the aviation industry. There was an incident (?) in a Foker 100 in Australia. Let's now imagine that there is some project change that has to be ...
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Must aviation rental services company do 100-hr inspections? [duplicate]

We rent our airplane to only certificated, rated pilots. These pilots may rent to increase their XC flight time. They may rent to take a family member sightseeing. In some cases they may rent our ...
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6 votes
1 answer
201 views

How long does a pitot tube last?

Aircraft components need periodic maintenance, this should be the same for the pitot tube that is an essential instrument for pilots. So do you know when should a pitot tube go into maintenance? I can'...
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What kind of analysis is done in front wheel plane? [duplicate]

I’m not sure how to describe this as a question… So here is an image: What is the device? (marked in red) What could the ground crew be analyzing near the wheel (marked in green) They’ve been at it ...
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40 votes
1 answer
8k views

What is the meaning of these stencils, usually found on military planes?

I am wondering what these markings (which I found both in the French Super Etendard and in the British Tornado) indicate? They may be something relevant for the maintenance crews.
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1 vote
1 answer
180 views

Aircraft zones - what is meant by zone 999?

There are designated zones where Positions/FINs are allocated - so components have both Part Numbers, Serial Numbers, Positions (or FINs for Airbus) and Zone classifications. Does zone ...
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EASA F1 / FAA 8130 Validity

Does anyone know if there is a set guideline / ruling for how long a EASA F1 / FAA 8130 is valid for between CRS issue of the component say from overhaul to when the component is actually fitted to ...
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-2 votes
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What can be done when the magnetic compass breaks during a cross country flight? [closed]

On United state a VFR cross country flight, after arriving you discover that the magnetic compass has leaked all of the fluid and is inoperative. The weather at airport shows a fast moving cold front ...
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What are the steps to change the map light bulb in a Cessna T182T?

T182T has "eye socket" map light. I have removed the ceiling panel and a ring that holds the whole fixture in, but I cannot access the bulb. How do I change the bulb in the map light?
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5 votes
1 answer
330 views

Will N1 shaft turn at the same time as N2 shaft?

For Turbo Fan Engine CFM56-7, was wondering how come the Fan blades (N1 shaft) turns when I turn the N2 Shaft manually. I thought N1 shaft is connected to the fan and booster rotor and LPT rotor and ...
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80 views

When is most of maintenance data collected

During which phase of flight is most of the maintenance data collected? Ascend, cruising or descend? Is there a website where I can find such information?
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For the purposes of complying with an AD, what exactly does "missing and/or incomplete maintenance records" mean?

I'm considering the purchase of a Piper PA-28R Arrow. I calculated the factored service hours which came up to around 2500 or half of the required FSH to make it subject to the recent Piper wing spar ...
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1 vote
0 answers
174 views

A320 Avionics Compartment Access Door (Seeking Photo References)

We're software developers currently working on a 3D A320 for training and we're getting quite stuck finding any suitable references of the Aviation Compartment Access Door - specifically both it's ...
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1 vote
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Is an aircraft maintenance diploma under EASA recognized for studying in the US?

I have a diploma certificate of aircraft maintenance engineering but I studied under EASA. So can I study and take the Bachelor degree in the USA without restarting all my study?
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2 answers
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Cessna 140 1946 TT [closed]

Hello I’m first time buyer airplane, I’m buying Cessna 140 1946 and it has TT 12.400 TSMOH 400 , needs anual and ADSB I’m I getting in trouble here ? Is too many hrs ? $17,000
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2 votes
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Is it feasible to repair a C152 that flipped onto its back?

So there's a C152 that was tied down and blew over onto its back, suffered some damage to its wings (but electric flaps still work) and significant damage to its stabilizers. Can it be fixed by ...
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4 votes
1 answer
272 views

If an airplane has a Vertical Speed Indicator is there a requirement that it be periodically checked for accuracy?

I believe I understand that there is no specific US FAA requirement for aircraft to carry a Vertical Speed Indicator (VSI). I believe I understand the basic operation of a VSI. It measures the rate ...
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-1 votes
1 answer
154 views

Starter of engine cfm56-3C

Pls ask me i really need to know this. After the engine CFM56-3C start and light up can i disconnect it's starter from it? In order to put it on onother engine for starting process?! Thank you in ...
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1 vote
1 answer
310 views

Can a certified mechanic ground my airplane?

The courtesy (under-wing) lighting and the rear seat overhead map light were on the same switch. I didn't like having the bright outside light on while my passenger read his magazine, so I separated ...
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How can I be US aircraft maintenance technician?

I have only an airframe-related experience of 8 years without a license, but have logbook, my US citizenship in process, and want to become an aircraft technician. How can I become a US aircraft ...
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23 votes
4 answers
6k views

Why would it not be OK to replace a map light bulb with an LED?

In the question about if it's OK to change your own map light, why did JScarry say "don't you dare replace [your map light] with an LED"? Or was he kidding?
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2 votes
1 answer
129 views

Are there specific engine TBO requirements for aircraft used in flight instruction?

If I own a plane, say a Piper arrow, and I want to charge 175/hr for the aircraft and 50/hr for instruction, is there any regulation on when to perform engine overhauls (TBO)? askacfi.com and avweb....
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0 votes
1 answer
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On IMA systems e.g. A380 how many people are required to preform regular maintenance checks on this system?

I am aware that there is usually 1 or 2 engineers preforming maintenance checks for a particular avionic system on an aircraft at a given moment. For IMA system, is there often more engineers working ...
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16 votes
1 answer
3k views

What is this cylinder covered in threaded studs and what is it for?

I can't figure out what this is. It looks like each post is threaded, but why is a mystery to me. My guesses include a grounding post, a bolt/nut testing stand that's not actually in an aircraft, or ...
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0 votes
4 answers
296 views

Do small or regional airports have maintenance staff or companies onsite?

Do small airports or regional airports with just a couple of flights per day, maybe even from different airlines all have on-site aircraft maintenance staff? It hardly seems economical to have ...
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3 votes
2 answers
163 views

Where do countries under international sanctions find spare parts?

Some countries are being touched by American or European sanctions. Such sanctions affects the possibility to import spare parts for American-made or European-made aircrafts (e.g. Iranian F14 and ...
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8 votes
3 answers
2k views

May pilots receive compensation for performing preventive maintenance under US regulations?

Under FAA regulations, I know that at least a private pilot certificate must be held in order for a pilot to perform preventive maintenance on an aircraft. May a pilot also get paid by someone else ...
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1 vote
0 answers
36 views

Can the FAA 8130-3 have "modified" status if a part is converted by replacing piece-parts from IPC?

I have been trying to identify if the FAA 8130-3 Instructions have some clarity but am unable to deduce if this situation is indeed acceptable. A sequence of events (Of sorts) is given below: A Part ...
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1 answer
510 views

What is the difference between a service manual and a maintenance manual?

What is the difference between service manual and maintenance manual? Because sometimes I found one, sometimes I found another, the content is similar but not the same. What are the differences and ...
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1 vote
1 answer
345 views

Why does part 135 require a maintenance log on board the aircraft, but part 91 does not?

During a dispute within friends, it came to my attention that in 135.65 the maintenance log copies must be present in the aircraft, and that 91.407(b) and 91.417(c) have similar rules, but, meanwhile, ...
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3 votes
0 answers
103 views

How does the maintenance cost of turboprops compare to turbofans?

I was initially under the impression that the added complexity of gearing in a turboprop would lead to more maintenance. Then I found out geared turbofans are becoming fairly common so there should be ...
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5 votes
1 answer
160 views

How can I tell if a rental aircraft has been maintained in good condition?

When I rent a Cessna (typically old) from the local airport, how concerned should I be that the plane may have been abused at some points over many years (over-load forces, hard landings, over-rev'd ...
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Where can I find maintenance manuals for the A380?

My friend recently acquired an external green light from an A380. They are the only details i have from him. I tried hunting the internet for maintenance manuals, technical details, schematics, ...
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1 vote
0 answers
67 views

Does the Flight Acquisition Unit on the Boeing 737 NG stream data?

I noticed on B737-800 entering the flight deck on the right side there is a port Data Loader and I think this is the Flight Acquisition Unit. Is this port used exclusively for loading data to FMCs etc ...
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1 vote
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How can I convert a SACAA (South Africa) AME license into a Belgium (EASA) licence?

I have a SACAA (South Africa) AME license and would like to convert it into a Belgium EASA licence part 66. What are the steps to follow?
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1 vote
2 answers
245 views

What information is recorded in aircraft sensor and maintenance logs?

I was wondering what the sensor and maintenance logs in an aircraft look like and what are the values logged? Like maybe the engine temperature, altitude, exhaust temperature, etc. I know the data is ...
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1 vote
1 answer
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Factors to be considered when re-engining aircraft

What parts of the aircraft need to be adjusted / refitted / added when fitting new (different type) of engines? Also what what kind of re-certification regarding airworthiness etc. will be necessary?
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1 vote
1 answer
399 views

Why is “L Fuel Low” illuminating on my Cessna that is full of gas?

I fly a fuel injected Cessna 172SP 200 hp. Tanks were just about full today and every 5 seconds or so in flight, I would get “L fuel low” and the left fuel indicator would drop to 0. I’ve consulted ...
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