AD 2005-24-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | EMB-135 | Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP Airplanes |
Unsafe Condition
Flame backflow into the APU compartment through the eductor during in-flight APU starts, which could result in fire in the APU compartment.
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Required Actions
Revise the airplane flight manual (AFM) to prohibit in-flight auxiliary power unit (APU) starts, and install a placard on or near the APU start/stop switch panel to provide such instructions to the flightcrew. Optionally, revise the AFM to allow limited APU starts. Install a flush-type or raised-type APU air inlet frame as specified in EMBRAER Service Bulletin 145-49-0018, Change 04, dated November 26, 2002. Revise the APU exhaust silencer as specified in EMBRAER Service Bulletin 145-49-0009, Change 09, dated April 12, 2005.
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Compliance Time
Before further flight
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Affected Aircraft
EMBRAER Model EMB-135 airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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