Commonwealth legislation

AD/PC-12/1 - Nose Landing Gear Forged Main Fitting

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This AD requires operators of Pilatus PC‑12 aeroplanes fitted with nose landing gear P/N 532.20.12.036 to strip paint and carry out a fluorescent‑penetrant inspection of the nose‑gear forged main fitting per CAO 108.10 and Pilatus Service Bulletin PC‑12 32‑001 (figure 1). An Authority‑approved high‑frequency eddy‑current inspection may be used instead without paint removal.

Initial inspection is before 50 hours TIS (or before 25 hours after 25 May 1995, whichever is later), then re‑inspect every 200 hours. Operators pay for labour, downtime and re‑priming; the Civil Aviation Authority decides acceptable alternative methods.

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AD/PC-12/1 - Nose Landing Gear Forged Main Fitting

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Pilatus PC-12 Series Aeroplanes

AD/PC-12/1 Nose Landing Gear Forged Main Fitting 6/95

Applicability: All PC-12 fitted with nose landing gear P/N 532.20.12.036

Requirement: Locally strip paint and inspect the nose landing gear forged main fitting using the fluorescent penetrant inspection method in accordance with CAO 108.10. Inspect the areas defined in Pilatus Service Bulletin PC-12 32-001, figure 1. Re-protect bare metal with a single coat of primer.

Alternatively a high frequency eddy current inspection method, approved by the Authority may be used, in which case it is not necessary to strip the paint.

Compliance: Initially inspect before 50 hours time in service or before 25 hours time in service after 25 May 1995, whichever occurs later.

Re-inspect at intervals not to exceed 200 hours time in service.

Background: An operator has reported finding cracks in the upper portion of the nose landing gear main forging. This directive requires removal of the paint and a fluorescent penetrant inspection since the cracks in the forging may be tight and difficult to detect visually. The use of fluorescent penetrant or eddy current increases the reliability of detection and consequently allows an increased inspection interval.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/PC-12/1 - Nose Landing Gear Forged Main Fitting