AD 2009-24-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | Various | Airworthiness Directives; Empresa Brasileira de Aeronáutica S.A. (EMBRAER) Model EMB-500 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Empresa Brasileira de Aeronáutica S.A. (EMBRAER) Model EMB-500 Airplanes |
Unsafe Condition
The possibility of elevator mass balance fasteners becoming slack under certain conditions. The loss of at least two fasteners may lead to an unbalance condition, which may induce flutter on airplane elevators.
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Required Actions
Replace the nuts of the right-hand (RH) and left-hand (LH) elevators' mass balance fasteners with new self-locking type nuts bearing part number MS21043-4. Follow Phenom by Embraer Service Bulletin No. 500-55-0001 for replacements. After 30 days from the effective date, only install self-locking type nuts, P/N MS21043-4, on the RH and LH elevators' mass balance fasteners.
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Compliance Time
Within 30 days after January 4, 2010
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Affected Aircraft
EMBRAER Model EMB-500 airplanes, serial numbers 50000005, 50000006, 50000008 through 50000036, 50000038 through 50000041, 50000043 through 50000046, 50000048, and 50000053, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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