# SDR AALA20131210008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2013
- Submitted: December 16, 2013
- Operation: Air carrier
- Aircraft: [N841NN](https://openairdocs.org/aircraft/N841NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30914
- Aircraft time: 11,615 hours, 4,558 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Adiru
- Condition: Malfunctioned
- Location: Zone 100
- 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/AALA20131210008

## Discrepancy

DFW CREW REPORTED LOST CAPTAINS PRIMARY FLIGHT DISPLAY INDICATION & FLIGHT DIRECTOR.  EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED LT AIR DATA INERTIAL REFERENCE UNIT.  SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.

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