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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2answers
45 views

How do piston engines deal with sea spray (saltwater ingestion)?

From my related question, I want to know about sea spray being ingested into a piston engine during flight. Will this immediately corrode the engine unless there are special materials? I'm asking ...
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1answer
25 views

What is the difference between component service and inspection?

What is the difference between component inspection and component service? And is overhaul / restoration a service or an inspection?
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0answers
21 views

Does TSR (Time Since Repair) Need A Reset After A Clean/Inspect/Test Workscope?

So I am a little unclear on what the regulations recommend. Say you have a component that has a Restoration (Ignore the nomenclature) workscope but it is strictly an Inspection/Cleaning/Testing ...
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0answers
59 views

Study material for B2 license [on hold]

I will soon be taking the oral for a civil aviation B2 license in Israel. The system here is similar to that of the EASA, can anyone give me tips on reading material that can help me prepare for the ...
2
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1answer
64 views

Where can I find details about a Cambridge Scientific Instruments Fuel/Air ratio Indicator?

In our restored Harvard Texan T-6 WW2 trainer aircraft, a Fuel/Air Ratio Indicator was installed. We cannot locate the wiring diagram of this system or information for the Cambridge Scientific ...
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0answers
44 views

What is the relation of AIR BLEED IN message with the pack system on an Airbus A320?

Before the power-up, if the pack switches are set to the ON position and the aircraft is powered up with the APU bleed off, is there a chance that the AIR BLEED IN maintenance message comes up on ...
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2answers
138 views

For large commercial aircraft, how are the tires changed?

Something at least the size of a 737, all the way up to the A380. How are aircraft tires changed for large commercial aircraft? Are they actually jacked up like with a car?
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2answers
220 views

What needs to be considered when changing a tire during boarding/deboarding?

Passenger aircraft tires are physically inspected by the cockpit crew member or technician after each landing or before take-off, that the tire may have been cut or punctured as it may have hit ...
2
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2answers
87 views

What Oil thickness is used for the geared turbofan jet engine gearbox

In light of the huge operating speed of the geared tubofan gearbox gearing down the fan speed, what Oil thickness is used for the geared turbofan jet engine gearbox and does it use use regular gearbox ...
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0answers
72 views

What is the service cycle or interval of the Landing gear of an A380 and 747-800

What is the service cycle or interval of the Landing gear of an A380 and 747-800, i.e how long between service, eg after how many take offs and landings with particular reference to bearing checks and ...
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1answer
34 views

What is the difference between iSpec2200 and S1000D specifications?

I know the iSpec2200 and S1000D are the specifications which are used in the aircraft maintenance manual, I have to know how they actually work in the aviation domain and what is the difference ...
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2answers
92 views

What is the difference between MEL and CDL?

I know the MEL and CDL are the minimum equipment list is provided by the manufacturer, if component missing or damaged means the aircraft must pass the MEL and CDL, I need some suggestions how it was ...
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1answer
343 views

Are there any safety hazards when testing the F-16's fire control radar on the ground?

What are the procedures for ground testing an aircraft's fire control radar - for the F-16 or any other aircraft - and are there safety hazards associated with exposures to humans? Most importantly, ...
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1answer
74 views

Materials for temporary dent repair?

On a recent commercial flight (A320neo), I noticed some materials attached to the leading edge of a slat (no photo available). The attached material was not smooth, it rather looked like a small ball ...
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1answer
220 views

Is it normal for a Boeing 757 engine to bounce under its fairing?

Earlier this week I was on a 757 flight from SFO to JFK and the right engine was bouncing under the fairing under mild turbulence, and really moving 2+ cm under moderate turbulence. Is that in any way ...
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1answer
62 views

Difference between general, airframe and power plant concentration courses

Trying to enrol for an aircraft maintenance technician course but the options are three that’s general, airframe and powerplant concentration. With the general being an affordable course to pursue, ...
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1answer
136 views

Where are the fuel tank sumps on an Aquila A210?

When I drain the fuel I have to do it three times: In addition to the drainer openings on both undersides of the wing and under the front fuselage (3 times in total). Can you tell or show me where ...
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2answers
184 views

Why buy an new plane or an helicopter? [closed]

This really keeps coming to my head. A brand new 172SP costs a quarter million while a older one (10 years older or a little bit older) costs for less than 100.000 Dollars and the only visible ...
2
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1answer
158 views

How are AOA sensors tested after working on them?

If a maintenance or replacement has been done for an AOA sensor, would the mechanic be able to test if the sensor now works correctly? Can such a sensor be tested on the ground? If there is no ...
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1answer
175 views

How and why would one call the cockpit of an A330 inside its nose gear bay?

According to this A330 call panel diagram, there is an option to call the nose gear bay with the MECH button. Where is the connection for this in the nose gear bay, and what would it be used for? The ...
12
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2answers
625 views

What do you need to do to bring a 737 Max back in service after 6 months in storage?

What kind of maintenance has to be performed on an aircraft if it has been stored for 6 months? For example, do fluids need to be changed, have the tires become flat, etc.
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1answer
89 views

What priviliges and limitations does an Aircraft(General) mechanic have versus an A&P?

The FAA provides practical test standards for Airframe, Powerplant, and General mechanic certificates. Mechanics seem to demonstrate a preference for Airframe & Powerplant, so much that "A&P" ...
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1answer
114 views

What are torque events and are they very common when flying a rotorcraft?

On rotorcraft like the MD500 the POH suggests that torque events be recorded in the aircraft maintenance logbook. What are these events, are they common and how many are typically logged during the ...
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1answer
134 views

Can one use a calculator for the EASA part 66 exam?

For the first 3 modules you will need to do some calculations, is a calculator allowed?
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1answer
79 views

What's Permaswage / Harrison tube repair?

In modern aircraft, damage of hydraulic tubes can be repaired by Permaswage/Harrison provided by maintenance manuel. However, What is Permaswage / Harrison? It's a name of company?
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0answers
114 views

What is the procedure for doing a symmetry check on a Cessna 172?

I'm trying to find the steps to do a symmetry check of a Cessna 172. Or a form, or the section of the maintenance manual.
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2answers
214 views

Why would a C150 tachometer be sluggish?

After having an issue with a tachometer bouncing so much that it fell off, I now have the opposite problem with the replacement (Mitchell D1-112-5025): The tachometer is sluggish. When I open the ...
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1answer
105 views

How to literally take the wing off a single engine Beechcraft-style airplane?

First off I do not want to do any kind of maintenance. I was driving past an auto junk yard and saw they have half of a low wing, maybe a Beechcraft, airplane and I would like to try and buy the wing ...
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2answers
343 views

How much of a plane is replaced over the lifetime of an aircraft?

A photo of an OC-135 with (presumably) P&W TF33-P-5 engines made me wonder how many of the components had been replaced, and what was left of the original airframe, engines, and other parts. There ...
2
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1answer
89 views

How is a composite fuselage repaired when structurally damaged?

In case of FOD, a fuselage puncture for example, what is the repair process? Considering time, complexity and cost, how is compared if it was an aluminium fuselage?
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1answer
57 views

What is the most critical data to measure for a predictive maintenance model for a drone?

I'm looking at making a predictive maintenance model for a drone (quadcopter mainly but can include others) I'm wondering what is the most common causes of failure due to "overflying". (not including ...
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1answer
62 views

Are there any certification requirements for steering bypass or lock pins?

Are there any requirements for aircraft bypass and/or lock pins? Do they have to be somehow certified by local or international aviation authorities?
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0answers
54 views

Source and Impacts of cracks on window pane? [duplicate]

Today, I spotted cracks on the outer window panes, of my aircraft, VT-GWH, a 11 year old A320. The cracks were present on every window pane that I could see. On simple observation, I found that the ...
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2answers
179 views

Do you have to lubricate the shock strut?

I have a school report about the lubrication on the shock strut and I was wondering if there is a specific type of lubrication they apply it on. This is for Cessna 150-152
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1answer
271 views

Are Dreamliner windscreens periodically replaced irrespective of damage?

Does Boeing have a statute that commands that the windscreens are changed for new irrespective of no signs of damage or fatigue, and if so, what are the intervals, for safety reasons?
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1answer
84 views

EASA part 66 licence conversion to the Japanese version?

I am looking at a job proposal in Japan. I need to transfer my EASA Part 66 engineers license to the Japanese version. Can anybody offer any advice on how I would achieve this?
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2answers
227 views

Why would a cylinder not work below a certain RPM?

We have an IO 540 Lycoming engine, and cylinder #3 doesn't work below 1900 RPM (cold to the touch; EGT and CHT are zero; no vibration). The engine is new, what could be the cause(s)? We cannot ...
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2answers
76 views

what is the earth resistance to be maintained while aircraft is on ground and during ground checks for military aircrafts

While aircrafts are under servicing on ground, the external dedicated earth wires are connected to the aircraft to avoid static hares effect to human beings. How much resistance value has to be ...
12
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1answer
3k views

What is the small cylinder on the firewall to the left of the battery?

What is this and should the yellow wire be soldered to it? Any ideas on preventing the wire from detaching again? I checked the C150 parts manual but didn't see it. Is there somewhere else I should ...
6
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2answers
424 views

Can a private pilot placard an inoperative instrument?

For certificated small aircraft that are not required to have a minimum equipment list. If you have an instrument break while on a cross country flight and it is not a legally required instrument for ...
2
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1answer
230 views

What does a white diagonal line mean on an Airbus ECAM DU?

When my A321 powers up, the lower ECAM DU shows only a diagonal white line. What does it mean and what would be the fix?
10
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3answers
482 views

For how long after the last A380 delivery does Airbus have to provide spare parts for it?

After Airbus's announcement that they plan to discontinue A380 production in 2021 after the last orders are filled, how long will they have to guarantee the availability of A380 spare parts?
25
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6answers
6k views

Why would a C150 tachometer bounce so much that the needle fell off?

On a long flight in a C150E, the tachometer started bouncing a little bit and the severity of the bouncing gradually increased until it was extreme: The tachometer was spinning in loops and making a ...
2
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1answer
226 views

What is the procedure to replace carpets in airliners?

Are all the seats removed, as well as trim and baseboard, before the carpet is replaced? If so, how is reinstalling the seats laid out; do they feel for the boltholes? Are the seats bolted on top of ...
4
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1answer
235 views

In normal condition, is the Airbus A320 APU fuel supplied by the main engine boost pump only?

I have a question relating to APU fuel system. As said in material, there are 2 system supplying fuel for APU to operate. 1st one is primary and 2nd one is secondary. In the 1st system or low ...
10
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1answer
2k views

Do rivets on airframe need special sealant to be airtight on pressurized airliners?

Do rivets on airframe need a dedicated sealant, e.g. epoxy, to be really airtight on a pressurized airliner, or is the expansion of the rivet shaft already sufficient? As a side note, how are carbon ...
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1answer
270 views

What is the acceptable position of the brake wear indication for A320?

What is the acceptable position of the brake wear indication (PIN) for an A320 to be safely dispatchable?
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1answer
117 views

May an airline replace an airliner's engines without the aircraft manufacturer's involvement?

Around a year ago in our country, there was an advertisement on TV regarding an airliner's program to modernize their airplanes' power plants. This airline has various types of Airbus and Boeing ...
2
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1answer
148 views

What happened to the power plants after an aircraft is retired?

Few weeks ago, there was a Boeing 747 belong to an airliner retired in our country. I am not sure what series is that, but seems it is 747-200. What then will happen immediately to the power plants ...
3
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0answers
129 views

Do aircraft manufacturers take steps to prevent pests like geckos from damaging the electronics?

Many Australians are suffering huge bills due to geckos getting into the circuit boards of their air conditioning units. Of course this is highly profitable for A/C manufacturers as they supply ...