# SDR UIEA2026100400944

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2026
- Submitted: October 9, 2026
- Operation: Air carrier
- Aircraft: [N408MC](https://openairdocs.org/aircraft/N408MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29261
- Aircraft time: 105,900 hours, 17,763 cycles
- System (JASC): [2197 · Air Conditioning System Wiring](https://openairdocs.org/jasc/2197)
- Part: Pcb
- Part number: 285U0035211
- Part serial: D00683
- Condition: Damaged
- Stage of operation: CL
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026100400944

## Discrepancy

EQUIPMENT COOLING EICAS CAUTION F270 ON CLIMB. CAPT ND BLANK FOR 30", FO  PFD FLICKERED ON CLIMB. MESSAGE BLANKED THEN LOST CAPT ND AND FO ND WAS INTERMITTENT.  R & R PRINTED CIRCUIT ASSY IAW AMM 21-58-05/401 & IPC 21-58-55-01B. OPS CHK OK; SCREENS ARE NO LONGER FLICKERING ON CAPT & FO, ND. R & R FAN CHECK VALVE SLEEVES PER AMM 21-58-03/401 & IPC 21-58-03-05. OPS CHKD OK. NO LEAKS NOTED. R & R FAN CHECK VALVE ASSY IAW AMM 21-58-03/401 & IPC 21-58-03-05. OPS CHKD OK. NO LEAKS NOTED.

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