# SDR QR9R20220428001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2022
- Submitted: April 28, 2022
- 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: 08720759252
- Aircraft time: 2,987 hours
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: None
- Part number: 066011530101
- Part serial: 4457
- Condition: Failed
- Stage of operation: HO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20220428001

## Discrepancy

RADAR ALTIMETER FAILED ON RUN-UP AND WOULD NOT COME BACK ONLINE. REMOVED AND REPLACED RADAR ALTIMETER IAW BK117 C-2 COM/NAV 34-41-01. MOC SUCCESSFULLY COMPLETED.

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