# SDR UIEA2024011400013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2024
- Submitted: January 16, 2024
- Operation: Air carrier
- Aircraft: [N418MC](https://openairdocs.org/aircraft/N418MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 32840
- Aircraft time: 85,478 hours, 13,895 cycles
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Cdu
- Part number: 4058650904
- Part serial: S242T102152
- Condition: Unknown
- Location: Unknown
- Stage of operation: CL
- How discovered: O
- Nature of condition: P
- Precautionary procedure: A, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2024011400013

## Discrepancy

30 MINS INTO FLIGHT, FO CDU LOST POWER. THIS HAPPENED JUST AS THEY WERE COASTING OUT. REPEAT WRITE-UP(<P>FOUND 115 VAC AT PLUG (DM7440A) PIN 40 TO P41. VOLTAGE NORMAL DURING WIRE SHAKE. GND ALSO NORMAL DURING WIRE SHAKE. OPS CHECK NORMAL FOR RH CDU. FOR T/S PURPOSES, SWAPPED CTR CDU TO RH POSITION. OPS CHECK NORMAL IAW AMM 34-61-02. REMOVED & REPLACED CENTER CDU & OPS CHECK GOOD IAW AMM 34-61-02 REF IPC 34-61-02-01</P>)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.