EASA SIB CE-20-09
M7 Aerospace SA227 Aeroplanes - Nacelle Keelson Webs and Surrounding Structural Areas - Inspection
Summary
The Special Airworthiness Information Bulletin SAIB CE-20-09 is an FAA information bulletin addressing an airworthiness concern for M7 Aerospace LLC Models SA227 airplanes. It focuses on inspection of the nacelle keelson webs and surrounding structural areas for cracks, damage, buckling, or wrinkles. This bulletin applies to all serial numbers of the SA227 aircraft under Type Certificate Data Sheets A5SW, A8SW, and A18SW.
What Changed
This bulletin introduces a recommendation for owners and operators of M7 Aerospace SA227 airplanes to inspect specific nacelle keelson web areas for structural damage. It highlights previously reported cracking and buckling issues near the drag brace fitting and upper leading edge ribs, and encourages voluntary reporting of findings to the FAA. No mandatory airworthiness directive is issued at this time.
Why It Matters
This information is important for aviation professionals as it raises awareness of potential structural issues that could affect the integrity of the nacelle keelson webs on SA227 aircraft. Early detection through inspection can prevent further damage and maintain airworthiness. Maintenance and compliance teams benefit from understanding these concerns to prioritize inspections and repairs accordingly.
What To Do
Operators of M7 Aerospace SA227 airplanes should inspect the nacelle keelson webs at the specified locations including the upper leading edge near spar straps at wing stations 136/137, the right-hand battery box rib at wing station 80.87, and the keelson web aft of the drag brace fitting at nacelle station 141.69. Any findings of cracks, damage, buckling, or wrinkles should be voluntarily reported to the FAA contacts provided. There are no mandatory compliance deadlines stated.