# SDR FDEA201107232914

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2011
- Submitted: July 25, 2011
- Operation: Air carrier
- Aircraft: [N245FE](https://openairdocs.org/aircraft/N245FE), registered now
- Make and model: Boeing 727277
- Aircraft serial: 22016
- Aircraft time: 42,186 hours, 33,391 cycles
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Thermal Switch
- Condition: Failed
- Location: Nr 3 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201107232914

## Discrepancy

DURING CRUISE AT FL360 ENGINE 3 BLEED AIR TRIP OFF LIGHT ILLUMINATED AND THE NR 3 BLEED AIR VALVE CLOSED,  SYS WOULD NOT RESET VIA QRH PROCEDURES ( LIGHT STAYED ON ).  CABIN ALTITUDE WAS RAPIDLY INCREASING THROUGH 10000FT AND AFTER DONNING OXYGEN AND  DESCENDING,  ABLE TO ESTABLISH PRESSURATION  WITH NR 2 BLEED AIR.   AFTER 10 MINUTES WE WERE ABLE TO  RESET THE NR 3 BLEED TRIP OFF LIGHT, BUT WE USED NR 2  BLEED FOR THE REMAINDER OF FLIGHT.  REPLACED NR 3 ENGINE BLEED THERMAL SWITCH IAW MM 36-22-001-4.  OPS CHECKS NORMAL ON GROUND AT THIS STATION.

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