# SDR QR9R2025091500001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2025
- Submitted: September 15, 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: 9297
- Aircraft time: 5,531 hours
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Air Data Module
- Part number: C17027DA01
- Part serial: 3013
- Condition: Inaccurate
- Location: Nav System
- 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/QR9R2025091500001

## Discrepancy

COPILOT ALTIMETER HAS 80 FOOT ERROR. 30.15 READ IN KOLSMANN WINDOW WITH FIELD ELEVATION OF 301 SET. CURRENT ALTIMETER AT TIME OF CHECK WAS 30.07. REMOVED AND REPLACED #1 ADC IAW 34-11-00, 4-1.

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