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.)

Filter by
Sorted by
Tagged with
1
vote
0answers
16 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 ...
0
votes
1answer
69 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 ...
-1
votes
0answers
59 views

Can constant tuning of the ADF frequency make the antenna become inoperative?

I tried tuning on my local NDB frequencies, from 460 Khz up towards 1173 Khz. I heard the local audio, then I tuned it back to 460 Khz. I noticed that the ADF decided to go inop afterwards. How come? ...
1
vote
1answer
158 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, ...
3
votes
0answers
70 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 ...
5
votes
1answer
148 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 ...
0
votes
1answer
147 views

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, ...
1
vote
0answers
48 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 ...
1
vote
0answers
36 views

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?
1
vote
2answers
105 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 ...
1
vote
1answer
69 views

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?
1
vote
1answer
221 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 ...
1
vote
2answers
107 views

How do I fix a slipping throttle friction lock in my C182?

The throttle friction lock in my C182 works poorly in cruise, it slowly eases out to a lower power setting. What can I do to make it better? I've attempted to turn the lock nut harder but without ...
1
vote
1answer
144 views

What is the problem if the temperature of the oil and heads of cylinders is too high?

What is the problem if the temperature of the oil and heads of cylinders is too high? What's the fault in piston engines?
0
votes
2answers
161 views

What type of BITE is involved after installing a new display on an aircraft?

There are 3 types of BITE (Built-In Test Equipment): power up interruptive continues which one of these is being used after installation of a new display on an aircraft?
2
votes
2answers
357 views

How frequently do civilian aircraft have mechanical issues to which passengers are oblivious?

I know that aircraft are pretty well built and maintained, but I am certain that while flying these aircraft also suffer from some or the other mechanical issues. I believe redundancy plays a huge ...
1
vote
2answers
154 views

Why would my electric turn coordinator suddenly stop working?

The electric Turn Coordinator in our Cardinal stopped working and we would like to understand the cause. It simply doesn't move at all, it remain fix. The red flag is not on, I have double checked the ...
2
votes
1answer
102 views

Why am I getting unusually high CHT on ground operations on one engine in a Seneca II?

Aircraft had sat for 3 months, and on startup the right engine CHT (Cylinder Head Temperature) was climbing noticeably higher than the left. After taxiing and run up CHT was near top of green. Redline ...
2
votes
0answers
74 views

Which dust size causes most damage to turbine engines?

I'm conducting some research on my bachelor's thesis on predictive maintenance and I have so far not been able to find a solution to the following question: Which size of dust is more damaging to the ...
0
votes
0answers
20 views

Can line and light maintenance be combined?

Is there any possibility to combine line maintenance and light maintenance (containing A, B and C check) under the name of line and light maintenance? In real is there any company which possesses a ...
1
vote
1answer
112 views

How do rotor tangs lock into wheel keyways?

How do the rotor tangs lock into wheel keyways? Are there special keys on the outboard wheel half that allow locking the tangs in place? Also would be great if anyone could provide me with a image of ...
2
votes
1answer
282 views

Can an unserviceable component be fitted on a serviceable aircraft for a maintenance check?

I was doing some reading on aviation regulations and I wanted to understand from an expert whether the following situation is allowable or not. I have reviewed EASA continuing-airworthiness guidelines ...
3
votes
4answers
708 views

Why landing gears still need bungee springs?

While studying landing gear, I came across this term 'bungee spring' to which there was no definitive explanation in text with regards to its usage. So in the image, you can see for the jury strut/ ...
1
vote
1answer
362 views

What is this part on a Cessna 172 engine?

Can any one tell me what this tube with the red is? This is a photo of a 1977 Cessna 172 engine. Looks like the tube is directly connected to the top of the crankshaft.
1
vote
1answer
3k views

What does “running torque” mean?

I would like to know the meaning of the phrase and especially the meaning of "running torque": Torque the inner plug to between 75 and 85lbf.in. Loosen half a turn and RETORQUE to between 15 and ...
0
votes
2answers
207 views

Could abrupt flight controls input cause damage in these circumstances?

I went flying yesterday with a friend in my 1972 Grumman AA-5. She's a good copilot for someone who doesn't know much about flying. I showed her how you can pitch up and down, cause 0G, and float, ...
3
votes
2answers
190 views

How do I have to fold a emergency slide so it can be reused?

I have the opportunity to buy a never used emergency slide from an Airbus A320 for cheap. So I need to know how they can be reused and how to deflate and repack them so I can use it for another time.
6
votes
1answer
309 views

Why is parking brake set OFF before jacking?

I have a question about the procedure to jack the aircraft for wheel replacement. According to the manual, it required to set the Parking brake OFF before starting jacking at the Main Landing Gear. ...
2
votes
1answer
163 views

What are the process involved in tire rotation during long term storage?

During Covid-19 crisis in 2020 a lot of planes are grounded for a long time. Tires of parked planes can develop flat spot hence the need to keep these tire rotate. What are the processes involved ...
3
votes
3answers
767 views

Why did some Spitfire variants have their wings clipped?

Some Spitfire variants have clipped wingtips instead of the round, elliptical wingtip. The reason for this is to increase the roll rate and low-altitude performance. My question is: How would clipping ...
3
votes
1answer
437 views

What if one of the navigation lights failed to function on a certified aircraft?

What is the implication if one of the navigation lights failed to function, would it affect the airworthiness certificate of the aircraft?
1
vote
0answers
33 views

What is the typical length of a Transport Category Aircraft Maintenance Manual (# of pages)?

This FAA publication contains the following image: The numbers it lists translate to some very long manuals: 1998: 43,071,266 pages/2,532 manuals = 17,010 pages/manual 2008: 184,068,439 pages/5,500 ...
44
votes
4answers
12k views

Why are 'ghost flights' necessary?

This article details the recent (March 2020) grounding of 90% of Ryanair's fleet due to the COVID-19 outbreak. Flight tracking data showed that all bar one of the jets had been flown in recent days:...
7
votes
2answers
399 views

How do airlines bring spare parts to aircraft stranded outside their main facilities?

No professional relationship with aviation. Just an avid follower. I guess it depends on location/part availability, etc, but looking for what typically happens. For the purpose of the question, ...
2
votes
2answers
110 views

Does the FAA have a document that details each step found in a Component Maintenance Manual?

Is there a standard FAA document type for 'general' maintenance steps that a Component Maintenance Manual (CMM) can reference? For example: Once the bulb has been locked into the socket, reference ...
25
votes
3answers
4k views

What sort of debris has been found in 737 Max fuel tanks?

There have been numerous reports of Boeing finding "foreign object debris" in the fuel tanks of its 737 Max airliners. It's not clear what this debris is. It could range from a couple of missing ...
1
vote
3answers
307 views

How many fastener can an aircraft lose?

I see this GIF animation a few times then I wonder how many fastener can an aircraft lose before it becomes dangerous. I’m sure losing one wouldn’t be an issue due to safety margin built into every ...
2
votes
1answer
220 views

What happens when an airplane is retired? [duplicate]

With launch of new models every few years, what happens to the older airplanes which was in service for more than decades? Where does it get stored. Who buys old airplanes? Does manufacturers buys ...
2
votes
1answer
130 views

Is there a required check before selling an airliner?

In France, when selling a car, the last check (more or less a C-check) must has been done within the 6 months before the owner change. Is there an equivalent requirement for airliners? I'm more ...
1
vote
1answer
133 views

Who decides when landing gear requires an overhaul?

"If the landing gear on your aircraft is required to be overhauled periodically..." So is there a case where its been decided that landing gear does not require to be overhauled?
2
votes
0answers
110 views

How do jetliners age (major or notable checks and part replacements)?

As commercial airliners can be (and are) operated for many years (or even decades), I've started to ponder - how do they actually age? Or - in other words - what are major or notable maintenance-...
1
vote
0answers
60 views

What does “representative sample engine” mean for an overhaul extension?

If the PT6 turbo prop engine is required for an extension for overhauling due to operational reasons, the manual has to be searched if the extension is feasible for the company. The company states ...
2
votes
1answer
220 views

Why does the APU Master Switch flash during a normal APU shutdown?

Hi all and Happy New Year!!! I have a question relating to APU shutdown procedures on Airbus A320. During normal APU shutdown sequences, I noticed that after around 1m20s, the FAULT legend on APU ...
1
vote
1answer
107 views

What, if any, equipment on a commercial airliner is (allowed to be) inoperative most of the time? [closed]

Since airliners are bound by their minimum equipment list, I was wondering, which parts/systems that are not on the minimum equipment list are often inoperative on normal commercial flights.
3
votes
0answers
60 views

What are the differences between a compressor wash on wing vs on test bed

I work in an aircraft engine overhaul facility and I’m trying to understand the process of compressor washing engines on Wing compared to washing them in a test bed. What process steps are different ...
1
vote
2answers
157 views

Difference between general visual inspection and pre-flight check inspection

I know the definition of general visual inspection (GVI) but I cannot understand the differences (if there are) with a pre-flight check inspection. I am new in the field and I am not a pilot (don't ...
2
votes
3answers
422 views

What is the reason for this engine oil service procedure on a Bombardier CRJ?

Someone told me that servicing the engine oil on a Bombardier CRJ900 aircraft with the APU on could lead to the particular engine being overserviced. He then advised that the engine-oil service be ...
10
votes
2answers
2k views

What does Lion Air faking the repair of the AoA vane mean for the Florida repair shop that ceased operations?

This is a lengthy read, but worth it. I'll quote the main piece I am speaking of. At the Bali airport, a vane, known as an angle of attack sensor, was replaced. Crash investigators were presented ...
8
votes
3answers
567 views

How does the engine wash improve engine performance?

According to maintenance manual, we usually carry out engine wash (CFM56) with pure water as scheduled task. Pure water is injected into the engine from the LP compressor inlet while the engine is ...
0
votes
1answer
196 views

Are you mandated to use a Fault isolation manual when clearing a defect on an aircraft?

I operate a Bombardier Dash 8 Q400. I want to know if aircraft engineers are mandated to close or rectify a defect by only following the fault isolation manual (FIM). Can an engineer instead use his ...

1
2 3 4 5
9