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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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What causes this error on the Collins 60A ADF system?

We've got a BAE Jetstream 32 equipped with a dual Collins 60A ADF system, and the co-pilot's side control head is: displaying "FLAG 10" when we press the TEST button; We looked up the error code, ...
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1answer
53 views

Hydro-pneumatic fuel controls and hydro-mechanical fuel controls

What are the advantages and disadvantages of the hydro-pneumatic controls against the hydro-mechanical controls?
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1answer
57 views

Who can sign off the aircraft after completion of 100-Hour Inspection?

Can the mechanic who performed 100-hour inspection sign off the aircraft?
3
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1answer
76 views

Is there such a concept as 'Max Overhauls' for aircraft components?

I have never seen any overhaul-able item with a documented limit on the number of times it can be overhauled. In all cases it was subject to analysis and predicated on it passing certain tests. Has ...
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1answer
59 views

Specific Acrylics for fabricating windscreen [closed]

I've a experimental aircraft in need of a windshield due to crazing caused by fuel and cracking caused by stress. It is made of polycarbonate/Lexan and I want to replace it with acrylic because of its ...
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1answer
48 views

What does the message content in the ARINC 615A FIND protocol look like?

I know the FIND protocol is used to discover which LRUs are available if the data loader supports the FIND protocol. I also know the message is sent as a broadcast using UDP, but what is in the ...
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1answer
156 views

Gas Turbine Engine Starting Sequence [closed]

How to explain the figure above?
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1answer
85 views

Why bother tracking TSN after an overhaul?

I've noticed that mechanics often like to keep track of "time-since-new" (TSN) on components that have already been overhauled. What would TSN matter when the component is tracked by TSO for ...
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0answers
46 views

What is the difference between an Instrument and Equipment?

In an aircraft, what things is an instrument and what things is an equipment? For example the ILS, is the Antennas located in the runway considered to be an instrument or an equipment? Or is there ...
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3answers
273 views

Are all tires on an aircraft replaced at the same time?

On cars, it is often to replace all four tires at the same time. Is this true also for aircraft? I imagine the nose gear and main gear probably can be replaced at different intervals. However, are ...
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2answers
129 views

What causes the inside glass of flight instruments to get hazy?

Sometimes on analog flight instruments (aka steam gauges) there is a haze or fogginess on the INSIDE of the glass that is NOT condensation. You can often find it on older aircraft with older ...
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0answers
41 views

Why doesn't GA aircraft use the JASC/ATA document standard?

By international law large aircraft are required to categorize aircraft information using a standard called the ATA document numbering system (Air Transport Association). The ATA document chapters ...
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1answer
220 views

What is the cause of cracking and corrosion in Trent 1000 engines?

According to this description and this one of some Trent 1000 engine problems, there appears to be a problem with cracking/corrosion of the fan blades, but does anyone have any insight as to why this ...
29
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1answer
4k views

Can the emergency slide be re-used after it has been deployed?

Can the emergency slides be re-used and re-packed after they have been deployed, assuming no damage is done? For example, I heard of a case where the slide was accidentally deployed due to opening of ...
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2answers
249 views

Is a 100 hour inspection required for an aircraft to be used in a checkride?

Is a 100 hour inspection required when renting an aircraft for a practical test with a DPE, to whom you are paying a fee? Lots of money is being exchanged, yet the DPE told me that it is not "For ...
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3answers
178 views

How are leaks in door rubber seals detected?

There are few reported incident where the rubber seal on the door was damaged and it took numerous hours to find the cause and then find the location of the damage. I want to know the ways to detect ...
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1answer
182 views

Why would one cylinder on a Continental O-200 run cold at idle?

I have a Luscombe with a Continental O-200 engine. The #4 cylinder is running cold at idle, does anyone have an idea why? The other three cylinders are running fine. Some extra information: The ...
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2answers
3k views

How frequently are airplane windows cleaned?

When you’re driving on the highway, after sometime unwanted insects and dirt accumulate on your windshield. When you stop over at a gas station, you might clean it off. It’s likely the case for ...
4
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1answer
115 views

What aircraft maintenance logs should I have available for a private checkride?

I’m about to do my Private Pilot Checkride in my own plane. I’ve been trying to find a list of things that will be needed for the Checkride in the logbook, as I had thought it was an updated annual, ...
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2answers
167 views

What names are used for certified “mechanics”?

While watching a documentary on the the UK Red Arrow aerobatic team, mechanics were sometimes called "tradesmen", "technician", or "engineer". In the US they are commonly called "aircraft mechanics" ...
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1answer
57 views

How to measure the aircraft maintenance cost of a operator? [closed]

How to measure the aircraft maintenance cost of a operator? What tool or mechanism can be used to measure such performance? Or what index can be used to determine the performance?
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2answers
49 views

What requirements do A&Ps (AMT) have to work on avionics?

Is there any additional requirement for A&Ps to work on avionics or is that even a totally different license? I just wonder why only a few A&Ps I met, also do avionics.
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0answers
67 views

What is the procedure to change EASA part 66 basic AML from one issuing authority to another?

What is the procedure to change EASA part 66 basic AML from one issuing authority to another? Is it really possible to do?
7
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1answer
393 views

Most time-consuming tasks while a plane is on the ground

How long should commercial planes stay on the ground after landing before they can take off again? What is the most time-consuming thing/task/operation that happens during this time? Is downloading ...
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0answers
62 views

Is there a standard install direction of the abradable shroud honeycomb on a CF6-80c2 engine?

Is there a standard install direction of the honeycomb cells on the Fan Forward case on the CF6-80C2 abradable shroud section? I have seen engines that the honeycomb cells run point to point front ...
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1answer
180 views

Is it possible to remove an A320's main gear using one main jack and one nose jack?

I have only one set of jacks (nose-main LH and RH) and I need to swap the main landing gear from one aircraft to another. I don't have a dummy landing gear. Is this possible?
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1answer
116 views

How are the NEO LEAP-1A engines attached on the A320?

How many bolts hold the NEO LEAP-1A engine to the pylon at the forward mount and at the aft mount?
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1answer
93 views

In BGA or ATR's what are the major causes of ODOR in Cabin or Smoke in Cabin? [closed]

In BGA or ATR's what are the major causes of ODOR in Cabin or Smoke in Cabin? There are some of the maintenance activities that are related to removal of Engines or APU. Removal reason: Smoke in cabin ...
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1answer
75 views

When did ATA introduce ATA Chapters?

When did ATA introduce the ATA chapters and since when was it used by all manufacturers? Thanks!
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0answers
126 views

How are turbine blades overhauled?

How are turbine blades overhauled? What techniques are commonly used and how does it affect the integrity of the blade?
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1answer
112 views

Can I use parachute fabric to cover an aircraft fuselage and wings?

... Are there disadvantages to using parachute fabric to cover an experimental aircraft? So far I observed the following: I believe I put this fabric in an open place for a year I found no cracks ...
30
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1answer
4k views

Why are aircraft coloured in yellow during construction, repair or overhaul?

Why are aircraft usually coated with "yellow", while either during construction or repair and overhaul? What exactly is the purpose of it?
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0answers
86 views

What could cause an engine shutdown on a Q400 with CDS codes 732, 907, 915 and 938?

A Bombardier Q400 displays error code 938 on the Central Diagnostics System(CDS), which is attributed to turbomachinery chip detector. An examination shows debris in the detector hitch which is ...
0
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1answer
274 views

How are jet engine RPM cycles used to monitor LCF life?

Can someone please define what are N1 and N2 throttle cycles? These are used to keep track of the accumulated low cycle fatigue (LCF) life of rotating components. But I cannot find an exact definition ...
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1answer
114 views

What skills do aviators have uniquely that could cross over to another industry? [closed]

I have developed sensitivities to several chemicals used in aerospace. I have to make a shift away from our industry, so I would like to know what are qualities in aviators that would be unique and ...
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1answer
156 views

Where to find the aircraft maintenance manual for the Falcon 2000? [closed]

How can I find a Falcon 2000 aircraft maintenance manual (AMM)?
12
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1answer
419 views

How are fuel tanks cleaned out?

One episode of the BBC series "Engineering Giants" featured a BA 747 undergoing a multi-week "D check". Here the inside of a fuel tank was surprisingly clean and dry (to me): ...
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3answers
288 views

What inspection packages commercial airliners follow which make them more reliable than a C-130?

The Hercules C-130 get unserviceable often due to various technical issues. This causes the flight to be aborted (ground or air abort) due to avionics, propulsion, airframe or electric problems. I ...
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1answer
90 views

Could maintenance data be downloaded via ATC facilities?

Could aircraft send maintenance data to the airport via ATC facilities (e.g., tower, TRACON, enroute)? Or are they only used for air traffic control?
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50 views

How to perform an operational test on the attitude and heading indicators?

I just need to know how to perfom it. The only thing I know is that you have to remove them and take them to a "lab".
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0answers
187 views

Why would the engine quit when turning on the R magneto after an overhaul?

I just finished overhauling a Lycoming O-360; it's currently on a stand, i.e. it's not in the aircraft. I replaced the capacitors and point gaps on both the L and R mags. I adjusted the E-gap and ...
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0answers
48 views

Is there a standard place to find detailed wiring circuit and component information for different aircraft?

Today I was looking into the systems that are affected by the STDBY ATTD (#1 and #2) circuit breakers in a SR22 and I accidentally stumbled upon something that I find very interesting and I've been ...
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1answer
792 views

What is the difference between GVI and DVI?

In any maintenance program I found some terms like General Visual Inspection (GVI) or Detail Visual Inspection (DVI) or Detailed Inspection (DTI). I want to know the difference between these types of ...
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1answer
873 views

What is the difference between HFEC and LFEC inspections?

Sometimes we have to do High Frequency Eddy Current (HFEC) or Low Frequency Eddy Current (LFEC) inspections. My question is: what are the major differences between these two types of inspection? Which ...
7
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2answers
331 views

Do turnbuckles twist the flight control wires?

When adjusting a turnbuckle on any flight control, we usually use a wrench and turn the hex shaped section of the rod end inserted into the turnbuckle barrel. That flight cable from the turnbuckle is ...
11
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1answer
253 views

Do FDRs & CVRs (black boxes) have an in-service life span?

Do Flight Data Recorders (FDRs) and Cockpit Voice Recorders (CVRs), aka black boxes, have an in-service life span? Is it necessary to replace them over time? If so, are there any regulations ...
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0answers
15 views

Do ALS Part 5 Section 5 items need to be included in the Maintenance Program?

Do ALS Part 5 Section 5 items need to be included in the Maintenance Program? I know that section 4 should be incorporated in the AMS. However, I am not sure whether section 5 is required or not. ...
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1answer
261 views

How are modern fighters cleaned? [closed]

I found this photo of a fighter jet being cleaned, how does this process work? (usatoday.com)
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2answers
370 views

Does an overhaul reset the 'life limit' of a turbine engine?

I've come across a very unclear maintenance document. It's often referred to as a "Hard Card" for an Engine Axial Compressor Turbine. This specific part happens to come from a French manufacturer, ...
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3answers
121 views

What is the real impact of biofuels on aviation?

I have seen tons of initiatives about using biofuels (like the ASTM D7566), but it is operative at large scale?, there is background info about demonstrative flights, but I don’t see a manufacturer or ...