Airworthiness Directive · Amendment 39-18132 · Air conditioning
Pilatus Aircraft Ltd. Airplanes
This AD applies to Pilatus Aircraft Ltd. Model PC-7 airplanes, all serial numbers, that:
(1) have not incorporated the actions of any version of PILATUS PC-7 Service Bulletin No: 21-006, which allows for the installation of a different air conditioning compressor mounted at a different location and makes the unsafe condition nonexistent; and
(2) are certificated in any category.
We are adopting a new airworthiness directive (AD) for PILATUS Aircraft Ltd. Model PC-7 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as the potential for a spring on the air conditioning compressor clutch plate to shear the oil cooler inlet-hose due to the close routing of these parts without a protective cover. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, within the next 120 days after May 19, 2015 (the effective date of this AD), install a cover assembly on the attachment points of the compressor following the Accomplishment Instructions in PILATUS PC-7 Service Bulletin No: 21-012, dated November 4, 2014.
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
