# SDR AALA20090724DFW05

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2009
- Submitted: July 28, 2009
- Operation: Air carrier
- Aircraft: [N964TW](https://openairdocs.org/aircraft/N964TW), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53614
- Aircraft time: 29,874 hours, 13,955 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Iru
- Condition: Failed
- Location: Cockpit
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20090724DFW05

## Discrepancy

DFW - INERTIAL REFERENCE UNIT FAILED IN FLIGHT.  RETURNED DFW WITHOUT INCIDENT.  REPLACED INERTIAL REFERENCE UNIT.  SYSTEM GROUND CHECKED NORMAL OPERATION.

---
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.