# SDR UIEA2023100700891

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2023
- Submitted: October 9, 2023
- Operation: Air carrier
- Aircraft: [N405KZ](https://openairdocs.org/aircraft/N405KZ), registered now
- Make and model: Boeing 747-4KZF
- Registry model: [Boeing 747-4KZF](https://openairdocs.org/model/boeing-747-4kzf) (OpenAirDocs)
- Aircraft serial: 36132
- Aircraft time: 55,278 hours, 10,611 cycles
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Wire Harness
- Part number: 61B45322
- Part serial: NSN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CL
- How discovered: V
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2023100700891

## Discrepancy

ENG 3 FIRE LOOP A & B FAILED(<P>R/R UPPER & LWR AFT DETECTOR ASSY IAW AMM 26-11-02. R/R HARNESS 61B45322 IAW AMM 26-11-02. R/R HARNESS WIRE AND ENG IDLE TEST RUN NORMAL IAW AMM 71-00-00. PERFORMED OPS CHECK, NO FAULTS FOUND FOR ENG 3 FIRE LOOP.</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.