Questions tagged [airworthiness-directive]

Airworthiness Directives (ADs) are legally enforceable regulations issued by the FAA to correct an unsafe condition.

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174 views

What are the financial implications for Lufthansa (and other airlines) of keeping the back row of their A320neo free of passengers?

After the recent EASA airworthiness directive concerning the potential for weight and balance problems with the A320neo, Lufthansa announced it would no longer sell seats on the back row of those ...
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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 ...
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How to take into account man hours in a Service Bulletin?

There are two phrases in any SB included "Total Man hour"and"Elapse time", which quantity should we use in job card for accomplishment an AD or SB?
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Does an AD terminate by issuing new one?

When an AD superseded by a new one, Does the operator still retain the instruction of superseded AD even though the AD include repetitive action?
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What's the difference between 'modification' and 'corrective action' in an AD or SB?

For example Modification of an airplane in accordance with the instructions of the specific SB as specified in Table 1 of this AD, as applicable...
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What is the meaning of AFT in airworthiness directives?

What is the meaning of AFT in airworthiness directives?
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How is the compliance time in this AD interpreted?

Within 25 flight hours (FH) after the effective date of this AD, or within 100 FH since the last inspection, whichever occurs later, and thereafter at intervals not to exceed 100 FH Do we have ...
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How is the time of “threshold” and “phase in” in the Airworthiness Directive? [closed]

For example Within the next [25 hours] time-in-service (TIS) after the effective date of this AD, unless already done within the last [75 hours] TIS, and thereafter at intervals not to exceed [100 ...
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Could you more explain about the compliance time specifies in the following sentence? [closed]

For example Prior to accumulating 5,000 landings or within the next 1,000 landings after the effective date of this AD, whichever occurs later.
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Who applies an airworthiness directive when the airframe is newer than the AD?

For example, an AD was issued in 1990 while the aircraft was manufactured in 2002? Who applies the AD, the manufacturer or the owner?
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532 views

Who decided that the Boeing 737 MAX planes that were airborne when the grounding was issued cannot enter and land in EU air space?

On March 12th, 2019, EASA grounded the Boeing 737 MAX series by publishing their Emergency Airworthiness Directive 2019-0051-E (AD): Effective Date: 12 March 2019, 19:00 UTC  [...] ...
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Is there a regulation that requires manufacturers to cover AD's for the life of the equipment?

I'm usually pretty good at finding regulations, but I can't find anything in this regard. I'm curious if manufacturers such as Cessna, Piper, or even Lycoming and Continental are required by law/...
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What is the procedure when a required A/D inspection via an AMOC has gone overdue?

I recently purchased an aircraft that was legally (and otherwise) airworthy. There is a visual inspection due (any private pilot can perform it) every 10 hours, but the ferry pilot may have ...
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Why does this statement about intrastate aviation in Alaska appear in airworthiness directives?

Airworthiness directives typically include a claim that they... Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction What's the reasoning ...
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Why is a (jet) engine in flight shutdown so critical?

EASA just announced an Emergency Airworthiness Directive grounding all A320neo planes with a certain type of engine. Reason is, that they have apparently the tendency to shut down in flight more often ...
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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 ...
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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 ...
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582 views

Why are some pitot tubes more prone to icing than others?

I understand that there were several cases pitot tube failure in a certain way. The pitot tubes were clogged by ice when the airplane was in cold and wet conditions. The remedy was to exchange the ...
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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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Who pays for the compliance with Airworthiness Directives (AD)?

Airworthiness Directives (ADs) are legally enforceable regulations issued by the FAA in accordance with 14 CFR part 39 to correct an unsafe condition in a product. Hence when an AD is issued, owner ...
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In what circumstances could a 787 stay powered on continuously for 248 days?

The FAA has issued an airworthiness directive for the 787: SUMMARY: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787 airplanes. This AD requires a ...
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Are there any Airworthiness Directives for the Boeing 777 that might explain MH370's disappearance?

Are there currently any ADs for Boing 777s which would indicate the potential for catastrophic electronic system failures that might explain MH370's transponder failure and other issues? Was the ...
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What is an Airworthiness Directive?

Aircraft which have been in service for a long time often have a lot of entries in their logbooks for Airworthiness Directives (ADs). What are they, and why are they important?