# SDR CALA2026072618020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2026
- Submitted: July 27, 2026
- Operation: Air carrier
- Aircraft: [N78501](https://openairdocs.org/aircraft/N78501), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31602
- Aircraft time: 60,487 hours, 23,132 cycles
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Adiru
- Part number: HG2050AC11
- Part serial: 5377
- Condition: Faulted
- Location: Zone 100
- Part time: 67,508 hours, 19,621 cycles
- Stage of operation: CL
- 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/CALA2026072618020

## Discrepancy

RT IRS FAULT ON CLIMBOUT. ATB,  REMOVED AND REPLACED AIR DATA INERTIAL REFERENCE UNIT IAW AMM 34-21-01. OPS CHKD GOOD AND NO FAULT LIGHT ON AT THIS TIME.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.