Airworthiness Directive · Amendment 39-21427 · Flight compartment and 2560, emergency equipment
Pilatus Aircraft Ltd. Airplanes
This AD applies to Pilatus Aircraft Ltd. Model PC-7 airplanes, all serial numbers, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Pilatus Aircraft Ltd. (Pilatus) Model PC-7 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a missing release bar retaining screw on a Harley-type buckle assembly installed on a harness shoulder strap. This condition, if not corrected, could lead to loss of pilot restraint and consequently loss of airplane control or injuries to the crew. The FAA is issuing this AD to address the unsafe condition on these products.
(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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
