AD 90-17-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A300 B4-601 | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A300 B4-603 | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A300 B4-605R | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A300 B4-620 | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A300 B4-622R | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A300 F4-605R | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A300 F4-622R | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A310-203 | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A310-221 | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
| aircraft | Airbus | A310-222 | Airworthiness Directives; AIRBUS INDUSTRIE Model A310 and A300-600 Series Airplanes |
Unsafe Condition
Loss of accurate attitude and heading information due to potential failure of Litton LTN 90 or LTN 90-100 Inertial Reference Units.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the three inertial reference units (IRUs), modify wiring in Zone 121, and install modified IRUs per specified service bulletins. Alternate compliance may be approved by the FAA's Standardization Branch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 45 days after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Airbus Model A310 and A300-600 series airplanes equipped with Litton LTN 90 or LTN 90-100 Inertial Reference Units.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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