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Airworthiness Directive 98-05-06

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Official AD 98-05-06 · FR doc 98-5201 · 1998-03-03 · airframe

Airworthiness Directives; Pilatus Aircraft Ltd. Model PC-12 Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Aircraft Ltd. (Pilatus) Model PC-12 airplanes. This AD requires inspecting the elevator for incorrect rivet lengths and installing new rivets if incorrect rivet lengths are found. This AD also requires inspecting the elevator to assure that an excessive gap (more than .004 inches or .1 millimeters (mm)) does not exist in the rivet shanks, and installing a shim between the rib and skin to fill any excessive gap. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified in this AD are intended to prevent fatigue damage to the elevator, which could result in structural failure and eventual loss of control of the airplane.

Which aircraft AD 98-05-06 applies to

MakesPilatus Aircraft Ltd.

Specific model not stated in provided applicability text. Within next 200 hours TIS after effective date, inspect the elevator for incorrect rivet lengths per Pilatus SB No. 55-001 (Nov 8, 1996); install new rivets if found. Within next 200 hours TIS after effective date, inspect the elevator to assure no excessive gap (more than 0.004 in / 0.1 mm) exists in the rivet shanks; install a shim between rib and skin to fill any excessive gap, per same SB. Prevents fatigue damage to the elevator that could cause structural failure and loss of control.

Whether AD 98-05-06 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 98-05-06 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.