Airworthiness directives › 2021-04-06
AD 2021-04-06 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
Makes named: pilatus. Models named: PC-7. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Pilatus Aircraft Ltd. Model PC-7 airplanes, all serial numbers, certificated in any category.
Compliance
(1) For airplanes with a Harley-type seat buckle assembly or buckle component listed in the Effectivity, paragraph 2.A., of IrvinGQ Limited Service Bulletin IGQSB033, Issue 2, dated December 2020 (IrvinGQ SB IGQSB033, Issue 2), before further flight after the effective date of this AD, inspect each seat buckle assembly on the front and rear seats (4 buckle assemblies total) for movement of the release bar retaining screws by following the Accomplishment Instructions, section 3.C.(1), of IrvinGQ SB IGQSB033, Issue 2. If there is any movement of a release bar retaining screw, before further flight, repair or replace the buckle assembly by following the Accomplishment Instructions, section 3.C.(2), of IrvinGQ SB IGQSB033 Issue 2. (2) As of the effective date of this AD, do not install a Harley-type buckle assembly or buckle component listed in the Effectivity, paragraph 2.A., of IrvinGQ SB IGQSB033 Issue 2, on the seat harness of any airplane unless it has been inspected as required by paragraph (f)(1) of this AD.
Required actions
A special flight permit may be issued with the following limitations: Operation in areas of known turbulence and aerobatic flight are prohibited.
Unsafe condition
This AD was prompted by a report of a missing release bar retaining screw on a Harley-type buckle assembly installed on a harness shoulder strap. The FAA is issuing this AD to detect and address defective buckle assembly release bar screws. The unsafe condition, if not addressed, could result in loss of pilot restraint with consequent loss of airplane control or injuries to the crew.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1