Questions tagged [airworthiness]

Questions about the regulatory or physical status of an aircraft being capable of safe flight

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What is the origin of the word 'Type-Certificate'?

As per the definitions of Type Approval and Type Certificate, Type Approval is more related to design approval or certificate of conformity. A type certificate (TC) is issued to signify the ...
Divya K.S's user avatar
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Can a US state declare an airplane unairworthy?

(This arguably is a question for SE.Law, but because it's so aviation-specific I figured I would ask it here first) A partner got this in a routine excise tax email from the Massachusetts Department ...
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Can aircraft certified under the new EASA Part 21 Light "Declared process" be used for commercial operations?

The new Part 21 Light for EASA member states includes a "declared" process for aircraft up to 1200 kg and two seats. This process results in a restricted CofA for use in EU member states (...
Mumbles's user avatar
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Whats the difference between "Type Certificate" and "Type Certificate Data Sheet" and how it fits into airworthiness

From my knowledge, a type certificate is given to the manufacturer which in turn allows them to get an airworthiness certificate for the plane it manufactures without having to go back to the FAA to ...
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What is the difference between a standard airworthiness and a experimental airworthiness certificate?

What is an experimental certificate? Is it just a certificate that is for aircraft that were built experimentally such as home-built aircraft? What is the purpose of the certificate?
youngpilot's user avatar
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If a plane doesn't require 100 hr inspection, but an AD must be checked every 100 hours, does that require a full 100 hr inspection?

Let's say a person privately own a plane and they are not using it for hire or instruction. So they are not doing the 100 hour inspections. However, there are several ADs that require it to be checked ...
Jonathan's user avatar
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Why is FAA Aircraft Certification Service department named as AIR?

The acronym AIR doesn't match with the functional name "Aircraft Certification Service" "AIR (the Aircraft Certification Service) is the department within the FAA that develops and ...
Divya K.S's user avatar
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14 CFR § 91.213 - Inoperative instruments and equipment. <Cessna 172S NAV III>

I am working on a commercial right now, but still, this confuses me a lot. For example, during the preflight, I found that the airplane has inoperative equipment. And our operator has no MEL. Then I ...
Jake Lee's user avatar
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Regaining airworthiness of a commercial aircraft

If a large commercial part 121 aircraft has lost it's airworthiness, and remained in that state for several months while being operated despite the loss of the airworthiness, what inspections and ...
Jpe61's user avatar
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Do ultralights registered in Germany require an annual inspection?

I'm trying to find out how the German Ultralight aircraft ongoing inspections system works - do German registered Ultralight need to be inspected annually before they can then be operated for a ...
Brad Edward Wagenhauser's user avatar
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Does the FAA take programming language selection of the aircrafts' avionics as a factor when deciding the aircraft's airworthiness certificate?

It looks like many military/space/aviation instruments are programmed in Ada or Spark. Because these languages claimed and proved their safety. What if your system is not written in these languages? ...
Westack's user avatar
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Are there any airworthy or transportable A-7 Corsair 2 aircraft as of October 2021?

I'm assisting in organizing an Aviation Open House, and we are searching for an A-7 Corsair 2. The only examples we can find are static ground displays, none of which can be easily transported. As ...
user60702's user avatar
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Is Cessna 150 with incorrectly marked ASI airworthy?

I've looked a bit at the CFRs trying to determine this for sure, but haven't found a clear answer.. One of the Cessna 150s that I rent from the local FBO had it's airspeed indicator swapped out four ...
Joe's user avatar
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Are there regulatory documents to carry medical kits and defibrillators on-board?

Are there any regulatory release documents applicable for carrying medical kits and defibrillators on-board a commercial airliner? For example for: Components, you are required to have an EASA Form 1 ...
Kamran's user avatar
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What is the life limit due to metal fatigue in large bombers?

This article explains how the B-52's will be kept flying for 100 years. Replacing the engines, electronics, etc. is one thing, but when would metal fatigue become a problem? These planes are huge and,...
KlaymenDK's user avatar
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Were airworthiness certificates revoked for B737 Max?

Following up from this question - or more specifically Brian Drummond's comment on the accepted answer: Or even revoked without modification, if something new is discovered about the existing ...
Aleks G's user avatar
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Is a Cessna 172S still airworthy if factory-installed instrumentation not required for day VFR flight is inoperative?

A C172S I occasionally rent had the EGT gauge placarded INOP when it had a JPI EDM-700 engine monitor installed. The placard sits on the gauge so you can no longer see the needle. Probably the single ...
Philipp's user avatar
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Can a closed Airworthines directive get reopened by a new revision?

There is an Airworthiness Directive that has been closed by accomplishing its terminating action. But there's a new revision that changes the terminating action. Do I have to comply with the new ...
ashlok's user avatar
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Validity of Volga-Dnepr An-124 Grounding in US

Around June 10th, a Ukranian court issued an order grounding 5 of Volga-Dnepr's An-124 cargo planes, citing maintenance checks conducted without OEM (i.e., Antonov) authorization. According to ...
lwr's user avatar
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Canceled regulations for an STC CCL

easy question: When creating a list of regulations (and the documents that show compliance with those regulations) that apply to our STC, if one of them has been canceled, would we continue to use ...
Jeremy's user avatar
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Why would a flight no longer considered airworthy be redirected like this?

I ran across this tweet covering the saga of Smartwings 1201, a 737 MAX 8 that was apparently redirected from Prague to Ankara after the MAX was grounded by the EU. (flightaware.com) It seems like ...
Machavity's user avatar
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What might happen if I receive flight instruction in a plane with an airworthiness deficiency?

Let's say I were to a day VFR flight with a new instructor, in hopes of eventually pursuing Sport Pilot - Airplane privileges (U.S.A.) During the flight, I notice the plane has a minor airworthiness ...
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How do changes in certification requirements affect previous type certificates?

How does the 2016 part 23 airworthiness requirements rewrite affect older type certificates? If some aspect of an aircraft does not meet the new requirement do all of those aircraft have to be ...
TomMcW's user avatar
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Aircraft lightning: What are the requirements for airworthiness?

Can you enlighten me about the airworthiness requirements in the field of lightning, for commercial aviation: Which voltage or intensity is the aircraft required to sustain? How is it demonstrated in ...
mins's user avatar
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Is AD compliance ever physically verified when maintaining an aircraft?

As we all know around here, national aviation authorities put out Airworthiness Directives mandating certain changes be made to aircraft during their service life so that the aircraft can stay ...
UnrecognizedFallingObject's user avatar
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7 answers
24k views

Why are there so few Lancasters still flying?

According to Wikipedia there are 54 airworthy spitfires in the world (30 in the UK alone), yet there are only 2 airworthy Lancasters (Lancaster B X in Canada & Lancaster B I in the RAF's Battle of ...
Notts90's user avatar
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Who can carry out airworthiness inspections?

My understanding is that aircraft regularly have inspections for defects just like cars in the U.K. have an annual MOT test to check their condition and safety. My question is, who can do these ...
Notts90's user avatar
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6 votes
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4k views

How does one determine if an airplane meets airworthiness directives?

There seems to be no way to determine if airworthiness directives for your airplane have been complied with. Does anyone know? I found this FAA website but you can type in a type of aircraft and ...
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When is a 100-hour inspection required if alternating commercial and private use?

First, a setup rehashing common knowledge: A plane owner, who's also a CFI, gets an annual done on his Cherokee and teaches out of it for 100 hours in three months. He flies it to a repair shop 3 ...
Dazz M's user avatar
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How can one determine if a Service Bulletin is still applicable?

I've seen the occasional Service Bulletin that is marked Obsolete, and others that Supersede SB-123. If I'm a pilot or A&P looking through logbooks, what resources are available to determine if a ...
egid's user avatar
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Can the MH-60 helicopter fly without one or all of the stabilators?

The MH-60R helicopter has a horizontal Stabilator that consists of three subassemblies, RH Stabilator, LH Stabilator, and Center Stabilator. Can the aircraft fly without the RH Stabilator? Can the ...
Steven's user avatar
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Does a 100 Hour Inspection Start Over Every Annual?

If an airplane receives a 100 hour at 350 hours and has an annual at 400 hours, does the next 100 hour inspection need to take place at 450 hours or 500 hours?
jskypilot's user avatar
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Why do Turkey and UAE limit the age of aircraft flying over their territory?

Why do the civil aviation authorities of Turkey (15 years civil, 25 years cargo) and United Arab Emirates (20 years) limit the age of aircraft flying over their territory? I think if an old plane ...
TesterMen Tester's user avatar
11 votes
2 answers
2k views

What liability does an aviation inspector have for errors & omissions?

In reading online, I've come across the term "pencil-whipping". The actual term is new to me but I'm familiar with the practice; it's when someone fills out the paperwork that attests something is ...
KeithS's user avatar
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3 votes
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What kind of certifications are required for a plane manufactured for personal use?

If I make an airplane (lets say for research/recreational purposes), what kind of certifications would be required to fly it? Moreover, would I need special permissions to actually fly the airplane? ...
Victor Juliet's user avatar
8 votes
3 answers
2k views

What were the disadvantages of early prop driven blended-wing aircraft?

I've been researching the history of pre-jet aircraft and I've come across several famous, and not so famous, blended-wing aircraft. The idea seemed to show promise but never really caught on, even ...
TechZen's user avatar
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17 votes
7 answers
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Why are older airplanes still in use?

It is normal to see older planes (20+ years) quite frequently. In fact, a few months ago I saw a plane over 50 years old (not in a museum but on a runway, about to take off). Comparing to cars, there ...
Farhan's user avatar
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14 votes
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How do I obtain permission to fly an airplane that isn't airworthy?

How do I get permission to fly an airplane with a non-safety-related airworthiness issue, like being out of annual or having an inoperative radio in order to take it somewhere that it can be fixed?
Lnafziger's user avatar
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