Tue, Feb 08, 2011
AD NUMBER: 2011-03-05
MANUFACTURER: Dornier Luftfahrt GmbH Models
Dornier 228-100, Dornier 228-101, Dornier 228-200, Dornier 228-201,
Dornier 228-202, and Dornier 228-212 Airplanes
SUBJECT: Airworthiness Directive 2011-03-05
SUMMARY: his AD results from mandatory
continuing airworthiness information (MCAI) issued by an aviation
authority of another country to identify and correct an unsafe
condition on an aviation product. The MCAI describes the unsafe
condition as:
The TC Holder received from operators, whose fleets are operated
in demanding operating-conditions and with very frequent Short
Take-Off and Landing (STOL) operations, reports of cracks located
in the web of fuselage frame 19. On 05 February 2007, EASA issued
Airworthiness Directive (AD) 2007-0028 which mandated Alert Service
Bulletin (ASB) 228-266 and required an inspection of the frame 19
on all Dornier 228 aeroplanes. In addition, the TC Holder also
initiated a flight-test campaign including strain measurements as
well as finite element modelling and fatigue analyses to better
understand the stress distribution onto the frame 19 and the
associated structural components.
The results of these investigations confirmed that STOL
operations diminish extensively the fatigue life of the frame
19.
Fuselage frame 19 supports the rear attachment of the Main
Landing Gear (MLG). This condition, if not corrected, could cause
rupture of frame 19, leading to subsequent collapse of a MLG.
The FAA is issuing this AD to require actions to correct the
unsafe condition on these products.
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