Airworthiness Directives; Short Brothers Model SD3-60 SHERPA, SD3-SHERPA, SD3-30, and SD3-60 Series Airplanes
airworthiness · Rule · Final rule. · Published 2001-01-30 · Effective 2001-02-20 · 66 FR 8167
Document
Document number
01-2110
Federal Register citation
66 FR 8167
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2001-01-30
Effective date
2001-02-20
FAA docket
Docket No. 99-NM-226-AD
Abstract
This amendment adopts a new airworthiness directive (AD), applicable to all Short Brothers Model SD3-60 SHERPA, SD3-SHERPA, SD3- 30, and SD3-60 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 reduce controllability of the airplane.