# SDR AALA202402279798

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2024
- Submitted: February 27, 2024
- Operation: Air carrier
- Aircraft: [N971AN](https://openairdocs.org/aircraft/N971AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29547
- Aircraft time: 61,902 hours, 26,275 cycles
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Adiru
- Part number: S242A101009
- Part serial: 99021457
- Condition: Faulty
- Location: Zone 100 - Fuse
- Part time: 507,733 hours, 503,834 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202402279798

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: BOTH IRS FAILED AFTER TAKEOFF, AIRCRAFT RETURN TO AND LANDED SAFELY AT MBJ. **SUPPLEMENTAL REPORT FOR (AALA202402269798):  REMOVED AND REPLACED (ADIRU) AIR DATA INERTIAL REFERENCE LEFT (AALA202402269798) AND (ADIRU) AIR DATA INERTIAL REFERENCE RIGHT (AALA202402276369), PER AMM 34-21-01. ALL REQUIRED TEST PASSED. REMOVED AND REPLACED ISDU (AALA202402270569), PER AMM 34-21-02. ALL REQUIRED TESTS PASSED**(CLOSED).

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