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Airworthiness Directive 97-27931

recurring
AD 97-27931 · 1997-10-23 · airframe

Airworthiness Directives; Pilatus Britten-Norman Ltd. Models BN- 2, BN-2A, BN-2B, BN-2T, and BN-2A MK. 111 Series Airplanes

What this AD requires

This amendment revises airworthiness directive (AD) 84-23-06, which currently requires repetitively inspecting the upper mounting brackets, bolts, and bushings on wing mounted engines for cracks, wear, and insufficient fit on certain Pilatus Britten-Norman Ltd. (Pilatus) Models BN-2, BN-2A, BN-2B, BN-2T, and BN-2A MK. 111 series airplanes, and replacing any cracked, worn, or ill-fitting part. This action retains the same action required in AD 84-23-06, except the action is only applicable to the BN-2A MK. 111 series airplanes. This action is the result of a terminating modification, now available to the Pilatus Models BN-2, BN-2A, BN-2B, BN-2T airplanes, which removes them from the applicability of AD 84-23-06. The actions specified by this AD are intended to prevent failure of the upper mounting brackets on wing mounted engines, which could possibly cause structural failure of the airplane.

Repetitive inspection. Re-inspect every 500 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 97-27931 applies to

MakesPilatus Britten-Norman
ModelsBN-2

Specific serial applicability list is in the preceding applicability provision, not present in this excerpt (supersedes/references AD 84-23-06). Addresses cracking/wear of the upper wing-mounted-engine mounting brackets, bolt holes, and bushings per Pilatus Britten-Norman SB BN-2/SB.61, Issue 5, with repetitive 500-hour inspections and repair criteria.

Whether AD 97-27931 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 97-27931 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.