On October 27, 1992, a Beech A35 (registration N8501A) operated by Lambrecht, Joseph J. was involved in an aviation accident near Vancouver, WA. Investigators recorded the probable cause as: DESIGN STRESS LIMITS OF THE AIRCRAFT WERE EXCEEDED. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
Wrinkles in fuselage skin near empennage were found during a preflight check, leading to discovery of damaged aft bulkhead and stringers. The aircraft had been repainted and undergone an annual inspection before two hours of flight time.
Discovery of Damage
Several months after the occurrence, wrinkles in the fuselage skin near the empennage were observed during a preflight check. A subsequent inspection revealed damage to the aft bulkhead and stringers.
Background
The pilot reported that the airplane had been repainted and then underwent an annual inspection. After the annual inspection, the airplane was flown for approximately two hours.
Post-Flight Observations
Several days after the last flight, the pilot noted the wrinkles in the fuselage. A mechanic inspected the airplane and reported that the balance of both ruddevators was found to be within limits as specified in the Beech maintenance manual. The pilot does not recall any instance in which the airplane was operated beyond the aircraft operating specifications.
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