# SDR QR9R2025100200002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2025
- Submitted: October 2, 2025
- 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: 9154
- Aircraft time: 5,225 hours
- System (JASC): [3444 · Ground Proximity System](https://openairdocs.org/jasc/3444)
- Part: Altimeter
- Part number: 066011530101
- Part serial: KRA405B6863
- Condition: Inoperative
- Location: Nr 1 Radar Alt
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2025100200002

## Discrepancy

RADAR ALTIMETER INOP DURING START RUNUP. REMOVED AND REPLACED RADAR ALTIMETER IAW NAV/COM 23-41-01; MOC SUCCESSFULLY COMPLETED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.