AD 2020-12-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | S | Airworthiness Directives; Embraer S.A. (Type Certificate Previously Held by Empresa Brasileira de Aeronáutica S.A.) Airplanes |
Unsafe Condition
Corrosion in the mass-balance weights of the flight control surfaces, which may lead to loss of mass or the detachment of the mass-balance weights, resulting in an unbalanced control surface, which, in conjunction with certain flight conditions, could lead to flutter and possible loss of airplane control.
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Required Actions
Inspect the mass-balance weights of the elevators, ailerons, and rudder (flight control surfaces) and their respective attachment parts for corrosion and fragmentation, and corrective actions include installation of a stainless steel mass-balance, replacement of the mass-balance, and replacement of attachment parts. For all Model EMB-505 airplanes, revise the airworthiness limitations section of the existing maintenance manual or instructions for continued airworthiness to incorporate new airworthiness limitations.
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Compliance Time
Before further flight
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Affected Aircraft
Embraer S.A. Model EMB-505 airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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