AD 2008-17-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | Various | Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes and Model ERJ 190 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes and Model ERJ 190 Airplanes |
Unsafe Condition
Some 'caution' messages issued by the Flight Guidance Control System (FGCS) are not displayed on aircraft equipped with certain EPIC software loads. This may lead to undetected FGCS channel failures, potentially resulting in a hardover command by the autopilot.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a functional check of the FGCS channels engagement, install an upgrade to the Primus EPIC Field-Loadable Software, and replace the actuator input-output processor if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 months after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
EMBRAER Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, -200 LR, -200 STD, and -200 SU airplanes, and Model ERJ 190-100 STD, -100 LR, -100 IGW, -200 STD, -200 LR, and -200 IGW airplanes, equipped with Primus EPIC software load versions 17.3-17.7 or 4.3-4.7, respectively.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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