EASA SIB CE-11-21
Hawker Beechcraft 33, 35 and 36 (Bonanza), 55, 56, 58 and 95 (Baron), and 60 (Duke) aeroplanes - Trailing Edge Flap Nose Rib P/N 35-165050-84 Cracking
Summary
The Special Airworthiness Information Bulletin SAIB: CE-11-21 is an FAA informational bulletin addressing potential cracking in the trailing edge flap nose rib part number 35-165050-84 on Hawker Beechcraft Bonanza Model Series 33, 35, and 36; Baron Model Series 55, 56, 58, and 95; and Duke Model Series 60 aircraft. This bulletin informs owners, operators, and maintenance personnel about the airworthiness concern but does not mandate any regulatory action. The cracking issue has been observed on both left-hand and right-hand flap nose ribs, with no current determination that it warrants an airworthiness directive.
What Changed
This bulletin introduces awareness of the flap nose rib cracking issue on specific Hawker Beechcraft aircraft models and provides recommendations for inspection and maintenance. It does not impose mandatory requirements but highlights findings from service difficulty reports and encourages proactive inspection practices. The bulletin also references Hawker Beechcraft Safety Communiqué No. 313 for additional guidance.
Why It Matters
This information is important for aviation professionals because the flap nose rib cracking could potentially affect flight control integrity and safety. Operators and maintenance teams need to be vigilant during inspections to detect early signs of cracking to prevent flap failures. Understanding this concern helps in maintaining aircraft airworthiness and avoiding unexpected flap malfunctions during flight.
What To Do
Operators and maintenance personnel should pay close attention to the flap nose rib area during pre-flight inspections and thoroughly inspect the up-stop bumper and nose rib for cracks during annual inspections. It is recommended to avoid stepping on the right-hand flap to reduce stress on the nose rib. No specific compliance deadline is mandated, but adherence to these recommendations is advised to ensure continued airworthiness.
AI-generated summary from official EASA source document. Always verify against the original.