# SDR ASAA2016100218188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2016
- Submitted: October 4, 2016
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 7,905 hours, 2,601 cycles
- System (JASC): [7410 · Ignition Power Supply](https://openairdocs.org/jasc/7410)
- Part: Exciter
- Part number: 9238M66P08
- Part serial: UNNCW573
- Condition: Intermittent
- Location: Nr 2 Engine
- Part time: 68,709 hours, 36,158 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016100218188

## Discrepancy

#2 ENGINE LEFT IGNITION INOP. GROUNDED - YES. UNABLE TO DUPLICATE FAULT, PRECAUTIONARY REPLACEMENT OF L/H EXCITER, REF B737-900 AMM 74-11-01, AND REPLACEMENT OF IGNITION PLUG, REF B737-900 AMM 74-21-02. OPS CHECK NORMAL, REF B737-900 AMM 74-00-00.

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