# SDR UIEA2025112901330

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2025
- Submitted: December 16, 2025
- 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: 103,809 hours, 17,433 cycles
- System (JASC): [2997 · Hydraulic Power System Wiring](https://openairdocs.org/jasc/2997)
- Part: Elec Connector
- Part number: BACC63BP10H55N
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2025112901330

## Discrepancy

ON DEPARTURE AT 1000' AGL, HYD QTY LOW 4 EICAS ADVISORY MESSAGE, RAN NNC 13.29, SECURED NR 4 HYDRAULIC SYSTEM OFF.   T/S PER WDM 29-33-12-2 TO PERFORM WIRING CHKS BTWN HYQUIM D7848CA TO #4 HYD SYS TRANSMITTER DT404, CHKS GOOD & INSULATION RESISTANCE CHCKS NORMAL. R & R CONNECTOR DT404 PER SWPM 20-61-11. OPS CHK GOOD.

---
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.