# SDR DL73G030981

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2003
- Submitted: December 29, 2003
- Operation: Air carrier
- Aircraft: N221DL
- Make and model: Boeing 737-35B
- Registry model: [Boeing 737-35B](https://openairdocs.org/model/boeing-737-35b) (OpenAirDocs)
- Aircraft serial: 23970
- Aircraft time: 41,197 hours, 21,674 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Iru
- Part number: 4618000208
- Condition: Failed
- Location: Nr 1
- Stage of operation: AP
- 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/DL73G030981

## Discrepancy

DIV DUE TO LOSS OF ALL HEADING INFORMATION.  REPLACED NR 1 IRU.

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