# SDR AALA201907019009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2019
- Submitted: July 2, 2019
- Operation: Air carrier
- Aircraft: [N804NN](https://openairdocs.org/aircraft/N804NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29567
- Aircraft time: 31,406 hours, 12,444 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Unknown
- Condition: Malfunctioned
- Location: Adiru
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201907019009

## Discrepancy

AIRCRAFT NOT GROUNDED: PILOT REPORTS BOTH FLIGHT DIRECTORS BLANK OUT ON TAKEOFF MOMENTARILY, CA RETURNED, FO STAYED BLANK. NO FAULTS NOTED. RIGHT IRS HAD NO POSITION AIRBORNE BUT NO FAULT LIGHT. FO FLIGHT DIRECTOR RETURNED AFTER ENTERING HDG FOR FO. MAINTENANCE REPORTS FFR SHOWS ADIRU(IRU) FAULT #2. MSG 22-11006. ACCOMPLISHED FIM 22-11-00-810-807, ALL CHECKS NORMAL. DFCS BITE CHECK NORMLA. IRU AND FD SYSTEMS CHECK NORMAL.

---
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.