AD 2007-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; AEROTECHNIC Vertiebs-u. Service GmbH Model Honeywell CAS67A ACAS II Systems Appliances |
Unsafe Condition
The absence of isolation diodes in the Heading and Attitude Valid lines can prevent the valid flag from appearing even if a gyro fault exists, leading to erroneous navigation information.
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Required Actions
Install isolation diodes into the signal lines to the TPU67A to prevent reverse feed of the valid lines.
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Compliance Time
Within 100 hours time-in-service (TIS) after August 16, 2007.
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Affected Aircraft
Honeywell CAS67A ACAS II systems installed on DORNIER LUFTFAHRT GmbH Models Dornier 228-100, Dornier 228-101, Dornier 228-200, Dornier 228-201, and Dornier 228-212 airplanes with Supplemental Type Certificate No. SA1310 installed prior to January 31, 2005.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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