# SDR QR9R2024112600001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2024
- Submitted: November 26, 2024
- Operation: General aviation
- Filed by: [M1 Support Services, repair station QR9R369D](https://openairdocs.org/faa-repair-station/QR9R369D/m1-support-services.md) (OpenAirDocs)
- Make and model: Bolkms BK117C2
- Aircraft serial: 10721399370
- Aircraft time: 3,521 hours
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Unit
- Part number: B315M5007051
- Part serial: LE1537
- Condition: Failed
- Stage of operation: TX
- How discovered: V
- Nature of condition: F
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2024112600001

## Discrepancy

ENG #2 START SWITCH FAILED TO ENGAGE ALONG WITH NO OTHER INDICATIONS. MAINTENANCE PERSONNEL ATTEMPTED TO VENTILATE #2, NO INDICATIONS OF N1 INCREASE. REMOVED AND REPLACED WARNING UNIT IAW AMM 31-50-00, 4-1. CHECKED GOOD IAW AMM 05-60-00, 6-12.

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