AD 2004-13-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | EMB-135 and -145 | Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes |
Unsafe Condition
Internal corrosion of the thrust reverser stow/transit switches could cause erroneous signals in the Engine Indicating and Crew Alerting System (EICAS), potentially resulting in uncommanded loss of engine power in flight or unnecessary aborted takeoffs on the ground.
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Required Actions
Inspect each of the six stow/transit switches on the engine thrust reversers using a megohmmeter test. Replace switches with insulation resistance measuring 100 megohms or less. Install new transit switches (part number 83-990-168) on both engines as specified in the AD. Compliance with previous service bulletins installing these switches is also acceptable.
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Compliance Time
Within 1,200 flight hours from the completion of the last inspection or within 400 flight hours after the effective date of this AD, whichever occurs later.
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Affected Aircraft
EMBRAER Model EMB-135BJ series airplanes listed in Service Bulletin 145LEG-78-0006, Revision 01, and Model EMB-135 and -145 series airplanes listed in Service Bulletin 145-78-0035, Revision 02, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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