An annual inspection found the aft bulkhead (P/N 0823400-63) of the left wing’s tip-tank assembly (P/N 5092300-17) horizontally cracked through -- as measured from the approximate center of the inboard lightening hole to the bulkhead inboard edge. The technician describes this area as “...adjacent to the aft attach point for the tip-tank assembly. The aircraft history of this area is unknown -- it may possibly have been caused by previous ground mishandling or a ‘hangar rash’ type incident.” (SDRS data includes two additional, almost identical reports of cracks in the same part.)

Part Total Time: 6, 881.4 hours.