# SDR QR9R20220518001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 18, 2022
- Submitted: May 18, 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: 15723669745
- Aircraft time: 2,886 hours
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Transformer
- Part number: FSC211
- Part serial: 2476
- Condition: Fluctuates
- Stage of operation: TO
- 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/QR9R20220518001

## Discrepancy

ON TAKE-OFF, THE AMMETER BEGAN FLUCTUATING BETWEEN 15 AND 30 AMPS CAUSING THE AP 1 TO FAIL. TEST FLIGHT EVALUATION REVEALED AMMETER DIFFERED BY AS MUCH AS 25 AMPS BETWEEN #1 AND #2 SIDES IN FLIGHT, AND THEN CONTINUED TO DIFFER BY 10-20 AMPS ONCE ON GROUND. #2 FLUCTUATED FREQUENTLY AND WAS CONSISTENTLY LOWER THAN #1.  REPLACED #2 CURRENT TRANSFORMER IAW AMM 24-30-00, 4-6; A/C OPERATED IAW RFM. MOC OK.

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