# SDR 9PMA2023092600568

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2023
- Submitted: September 26, 2023
- Operation: General aviation
- Aircraft: [N59JN](https://openairdocs.org/aircraft/N59JN), registered now
- Make and model: Cessna 525C
- Registry model: [Cessna 525C](https://openairdocs.org/model/cessna-525c) (OpenAirDocs)
- Aircraft serial: 525C0018
- Aircraft time: 3,122 hours, 1,790 cycles
- Engine: Wilint FJ444A
- System (JASC): [3110 · Instrument Panel](https://openairdocs.org/jasc/3110)
- Part: Buss
- Condition: False Indication
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9PMA2023092600568

## Discrepancy

ON CLIMB OUT , DCU A , DCU B , AP PITCH CONTROL FAIL , IFIS MISCOMPARE AND AP FAIL . UPON ARRIVAL OF MX NO FAULT WAS FOUND . GAINED ACCESS TO THE FAULT HISTORY AND VERIFIED THERE WAS A DCU CHANNEL B FAULT IN THE AIR WITH A FDR-1 MODULES BUS INOP MESSAGE PRESENT DURING FAULT WHICH TRIGGERED AN A/P PITCH TRIM FAIL MESSAGE AND PRESSURIZATION 2 FAIL MESSAGE . REMOVED CARD FROM ARES BOX AND DOWNLOADED FILE FOR 8/03/23 TO FORWARD TO TEAM CJ FOR EVALUATION. POWERED AIRCRAFT AGAIN TO VERIFY NO FAULTS ARE PRESENT AT THIS TIME.

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