EASA SIB NM-14-08
Cessna 500, 501, 550, S550, 551, 552 and 560 - Aerodynamic Fuselage Fairings
Summary
The Special Airworthiness Information Bulletin SAIB: NM-14-08 is an FAA advisory concerning certain Cessna Aircraft Company models 500, 501, 550, S550, 551, 552, and 560 airplanes modified by Sierra Industries, Ltd. It addresses an airworthiness concern related to radome latch covers that may allow moisture ingress. The bulletin provides information but does not mandate regulatory action.
What Changed
This bulletin informs operators about the potential defect in radome latch covers with part number SI160-110-9 and recommends replacing them with improved covers having part number SI160-110-14. It introduces the Sierra Industries Service Bulletin SB-SI160-100 as the source of the recommended corrective procedure to prevent moisture entry into the radome area.
Why It Matters
Moisture entering the radome area can affect aircraft systems and potentially compromise safety. Aviation professionals, including operators and maintenance organizations, need to be aware of this issue to maintain aircraft airworthiness and prevent possible damage. Although not mandatory, following the recommendation helps ensure continued safe operation of the affected Cessna models.
What To Do
Operators of the affected Cessna models should review Sierra Industries Service Bulletin SB-SI160-100 dated October 29, 2013, and plan to replace any radome latch covers with part number SI160-110-9 with the updated part SI160-110-14 during the next scheduled maintenance check. There is no mandatory compliance deadline, but timely action is advised.
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