Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated 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:
In-service reports have been received by BAE of failed bolts fitted to frame 199 wing spigot post assembly. If left uncorrected failure of these bolts will severely compromise the structural integrity of the wing to fuselage attachment. Failure of which would lead to loss of the aircraft. To address these concerns, BAE issued SB 57-JA020740 original issue in February 2003 mandated by CAA AD 006-02-2003. Recently received additional information has caused BAE to raise the Service Bulletin to revision 2. Revision 2 of the SB introduces various changes. One is substantive, it relates to the need to check for correct washer installation. Incorrect installation could lead to fretting and fatigue crack initiation in the fitting followed by failure or bending loads in the bolt leading to failure of the affected bolts. If left uncorrected failure of these bolts or a wing fitting will severely compromise the structural integrity of the wing to fuselage attachment, failure of which would lead to loss of the aircraft. This substantive change to the service bulletin necessitates the raising of this superseding AD.
The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.