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Airworthiness Directive 99-18-22

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Official AD 99-18-22 · FR doc 99-22920 · 1999-09-03 · airframe

Airworthiness Directives; Fokker Model F27 Series Airplanes Equipped With Rolls-Royce 532-7 ``Dart 7'' (RDa-7) Series Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F27 series airplanes, that requires revising the Airplane Flight Manual (AFM) to provide the flightcrew with modified operational procedures to ensure continuous operation with the high pressure cock (HPC) levers in the lockout position. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent burnout of the engines during flight by ensuring that the HPC levers are in a permanent lockout position.

Which aircraft AD 99-18-22 applies to

MakesFokker
ModelsF27

Applies to airplanes as listed in Fokker F27 Service Bulletin F27/61-40, Revision 1, dated August 1, 1997; certificated in any category.

Whether AD 99-18-22 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 99-18-22 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.