# SDR ASAA2023040242742

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2023
- Submitted: April 6, 2023
- Operation: Air carrier
- Aircraft: [N428AS](https://openairdocs.org/aircraft/N428AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36353
- Aircraft time: 25,797 hours, 8,082 cycles
- System (JASC): [7410 · Ignition Power Supply](https://openairdocs.org/jasc/7410)
- Part: Exciter
- Part number: 106310452
- Part serial: 7NNEK952
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 81,632 hours, 34,248 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023040242742

## Discrepancy

ENG #1 NO LIGHT OFF DURING START. GROUNDED - YES.  REMOVED AND REPLACED #1 ENG L/H EXITER AND IGNITOR, AUDIBLE TEST FAILED REF AMM'S 74-11-01 + AMM 74-21-02, SUSPECT BAD HARNESS, REQUIRES FURTHER TROUBLESHOOTING. REMOVED & REPLACED #1 IGNITION LEAD IAW AMM 74-21-01, REMOVED & REPLACED #1 IGNITION HARNESS IAW AMM 71-51-03 NO FURTHER DEFECTS NOTED.

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