# SDR FDEA201301310240

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2013
- Submitted: February 7, 2013
- Operation: Air carrier
- Aircraft: [N723FD](https://openairdocs.org/aircraft/N723FD), registered now
- Make and model: Airbus A300 B4-622R
- Registry model: [Airbus A300 B4-622R](https://openairdocs.org/model/airbus-a300-b4-622r) (OpenAirDocs)
- Aircraft serial: 543
- Aircraft time: 40,082 hours, 24,286 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Check Valve
- Part number: B05JB1040
- Condition: Leaking
- Location: Hyd System
- Stage of operation: NR
- How discovered: 9
- Nature of condition: B, J
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201301310240

## Discrepancy

MAIN CARGO DECK SMOKE DETECTOR ACTIVATED WHEN APU BLEED SELECTED ON.  SMOKE FILLED MAIN DECK. CLOSED APU BLEED AND SHUTDOWN APU, BATTERIES.   FOUND BOTH RELIEF VALVES STUCK OPEN ON BOTH SIDES.   REPLACED APU PRESSURE LINE CHECK VALVE IAW MM 29-14-17-04, REPLACED YELLOW RESERVOIR AIR PRESSURE RELIEF VALVE IAW MM 29-14-00-00 & MM 29-11-11-04.    DECONTAMINATION CHECK IAW MM21-51-00-03.

---
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.