Airworthiness Directives; Aerospatiale Model ATR42-300 and ATR42- 320 Series Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 1997-02-20 · Effective 1997-03-07 · 62 FR 7665
Document
Document number
97-3843
Federal Register citation
62 FR 7665
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Aerospatiale Model ATR42-300 and ATR42- 320 Series
Publication date
1997-02-20
Effective date
1997-03-07
FAA docket
Docket No. 97-NM-24-AD
Abstract
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Aerospatiale Model ATR42-300 and ATR42-320 series airplanes. This action requires repetitive ultrasonic inspections to detect fatigue cracks of the lower lugs of the barrel of the main landing gear (MLG); and replacement of cracked lower lugs with new or serviceable ones and a follow-on inspection. This amendment is prompted by reports indicating that, due to fatigue cracking in the lower lugs of the barrel, the MLG collapsed. The actions specified in this AD are intended to detect and correct such fatigue cracking, which could lead to the collapse of the MLG.