AD 96-21-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | LITEF GmbH | Attitude and Heading Reference System | Airworthiness Directives; LITEF GmbH Attitude and Heading Reference System (AHRS) Unit Model LCR-92, LCR-92S, and LCR-92H |
Unsafe Condition
The AHRS unit may provide misleading roll and pitch information to the attitude indicator, with no failure indication, when exposed to radio frequency levels much lower than the levels to which the AHRS unit was qualified.
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Required Actions
Either install a placard adjacent to each primary attitude indicator stating flight is limited to Visual Flight Rules (VFR) operations only, or modify and inspect the AHRS wiring cables, perform a repetitive inspection of the cable shielding, and insert a statement into the aircraft flight manual.
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Compliance Time
within 60 calendar days after the effective date of this AD
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Affected Aircraft
LITEF GmbH Attitude and Heading Reference System (AHRS) Models LCR-92, LCR-92S, and LCR-92H with specified part numbers installed in aircraft certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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