# SDR CALA2026021813869

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2026
- Submitted: February 18, 2026
- Operation: Air carrier
- Aircraft: [N13716](https://openairdocs.org/aircraft/N13716), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28787
- Aircraft time: 82,900 hours, 30,561 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Adiru
- Part number: HG2050AC07
- Part serial: 56024522
- Condition: Faulty
- Location: E5 Rack
- Part time: 46,562 hours, 17,276 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026021813869

## Discrepancy

ACFT RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION O R AIR TURN BACK DUE TO A MECHANICAL REASON LOCKED BY SYSTEM. AIR DATA INERTIAL REFERENCE UNIT - INSTALLATION, AMM REFERENCE: TASK 34-21-01-400-801, OPS CHECK OK. PERF LAND VERIFY TEST,AMM REFERENCE: TASK 22-11-00-700-801 ALL TESTS PASS, AC RETAINS FULL AUTOLAND CAPABILITES.   REPLACING THE ADIRU WOULD SUFFICE WITH CORRECTING THE FAULT AND RETURN THE AIRCRAFT TO SERVICE .

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