AD 2004-25-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | Various | Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes |
Unsafe Condition
Temporary loss of the pitch trim command, which could result in reduced controllability of the airplane and consequent injury to the flightcrew and passengers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the pitch trim system by replacing certain components with new or serviceable components and upgrading certain software to a newer version. Operators may choose to use EMBRAER Service Bulletin 145-31-0042, Revision 01 or Revision 02, as optional sources of service information for replacing IC-600 computers. For Model EMB-135BJ series airplanes, replace the horizontal stabilizer control unit (HSCU) with a new unit having improved features, as described in EMBRAER Service Bulletin 145LEG-27-0002, Revision 01.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 18 months or 5,000 flight hours after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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