Airworthiness Directive · Amendment 39-13152 · Gulfstream Aerospace LP Model Astra SPX and 1125 Westwind Astra Series Airplanes
Gulfstream Aerospace LP Model Astra SPX and 1125 Westwind Astra Series Airplanes
Model Astra SPX series airplanes having serial numbers 073 and 079 through 131 inclusive; and Model 1125 Westwind Astra series airplanes having serial numbers 004 though 072 inclusive, and 074 through 078 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Gulfstream Aerospace LP Model Astra SPX and 1125 Westwind Astra series airplanes, that requires removing the existing oxygen shutoff valve and installing a new oxygen shutoff valve. The actions specified by this AD are intended to prevent rapid adiabatic compression within the oxygen line between the oxygen shutoff valve and the pressure regulator due to a shutoff valve that can be opened quickly, which could result in overheating of the oxygen system and consequent fire in the cockpit. This action is intended to address the identified unsafe condition.
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.
