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Airworthiness Directives (ADs)

CAA-2011-12-011(已有後續修訂版)

The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.

Issue Date
2011/12/21
Applicability
All Bell Helicopter Textron Canada Model 206 helicopters
Model Number
Bell Helicopter Textron Canada Model 206 helicopters
CAA AD Number
CAA-2011-12-011(已有後續修訂版)
Aeronautics Authority of Original AD
Transport Canada Civil Aviation
Original AD Number
CF-1995-17R1
Effective Date
2012/01/09
Subject
Two accidents have been attributed to crosstube assemblies (crosstubes) failures. Therehave also been a number of reports of cracks due to corrosion or metal fatigue that might cause a failure of the crosstubes. On the crosstubes of older design, the cracks were mostly found at the rivet holes in the attachment-to-fuselage area and at the saddle attachment. On the newer, clamp-on tubes without holes, the cracks were mostly found in the saddle attachment area and along the line where the clamp touches the tube. Helicopters operating in a corrosive environment, or being used in training or sightseeing role involving frequent landings are most affected.
Reference Publications (Revision/ATA/SB)
Supersedes Airworthiness Directive CF-1995-17(CAA-85-206-013) Ref. Alert Service Bulletin (ASB) No.94045, Revision B dated 17 April 1995.
Remarks
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