Airworthiness Directive · Amendment 39-11743 · Israel Aircraft Industries, Ltd., Model 1125 Westwind Astra and Astra SPX Series Airplanes
Israel Aircraft Industries, Ltd., Model 1125 Westwind Astra and Astra SPX Series Airplanes
Model 1125 Westwind Astra and Astra SPX series airplanes, serial numbers 004 through 115 inclusive; certificated in any category.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to certain Israel Aircraft Industries, Ltd., Model 1125 Westwind Astra and Astra SPX series airplanes, that requires replacement of the existing pneumatic de-icing boot pressure indicator switch with a newly designed switch. This amendment is prompted by an occurrence on a similar airplane model in which the pneumatic de-icing boot indication light may have provided the flightcrew with misleading information as to the proper functioning of the de-icing boots. The actions specified by this AD are intended to prevent ice accumulation on the airplane leading edges, which could result in reduced controllability of the airplane.
To prevent ice accumulation on the airplane leading edges, which could result in reduced controllability of the airplane, accomplish the following:
(a) Within 1 year after the effective date of this AD, replace the pneumatic de-icing boot pressure indicator switch with a switch that activates the flight deck indicator light at 15 pounds per square inch gage, in accordance with Astra Alert Service Bulletin 1125-30A-199, dated April 17, 2000, or in accordance with a method approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate.
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
