# SDR QR9R20220330002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 30, 2022
- Submitted: March 30, 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: 14723229693
- Aircraft time: 3,024 hours
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Control Unit
- Part number: C19270AA
- Part serial: E1765
- Condition: Failed
- Stage of operation: CR
- How discovered: V
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20220330002

## Discrepancy

FCDM1 FAILED IN FLIGHT. DURING MTF MOC FOR FCDM 1 FAILURE, DETECTED FCDM 1 SYSTEM FAILED AFTER SWAPPING OF FCDM 1 AND 2 POSITION. SWITCHED THE RCU FROM N TO 1 AND THE SYSTEM DID NOT WORK, SWITCHED TO FCDM 2 AND SYSTEM WORKED WITH FCDM 1 INDICATION ON BOTTOM LEFT OF ALL 4 SCREENS. REPLACED RCU IAW AMM 32-61-00, 5-5 GROUND MOC OK.

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