# SDR QR9R20211210003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2021
- Submitted: December 10, 2021
- 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: 14723199689
- Aircraft time: 2,232 hours
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Altimeter
- Part number: 066011530101
- Part serial: KRA405B15416
- Condition: Inaccurate
- Stage of operation: HO
- How discovered: V
- Nature of condition: G
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20211210003

## Discrepancy

DURING RUN-UP RDR ALT READ 0 FEET. WHEN A/C WAS BROUGHT TO HOVER RDR ALT READ 30 FEET. WHEN A/C LANDED IT READ 28 FEET. REPLACED RADAR ALTIMETER IAW COM NAV 34-41-01. MTF EVAL COMPLETED IAW AMM 05-60-00,6-1.

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