# SDR CALA2012083100555

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2012
- Submitted: August 31, 2012
- Operation: Air carrier
- Aircraft: [N33132](https://openairdocs.org/aircraft/N33132), registered now
- Make and model: Boeing 757224
- Aircraft serial: 29281
- Aircraft time: 58,067 hours, 13,108 cycles
- Engine: Rroyce RB211535E4
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Motor
- Part number: 20224785
- Part serial: 0574
- Condition: Failed
- Location: Outflow Valve
- Part time: 58,058 hours, 3,070 cycles
- Stage of operation: CR
- 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/CALA2012083100555

## Discrepancy

PRESSURIZATION AT FL 350 CABIN HORN SOUNDED. CABIN RATE OF CLIMB WAS 2000 PLUS PRIOR TO THIS EVENT CABIN TEMP WAS 80+ PACK SWITCH SET TO MANUAL "C" TO COOL THEN BACK TO AUTO PERFORMED FIM TASK 21-30-00-815-803.  CONTROLLER DISPLAYED A/C MOTOR FAULT.  R & R FWD & AFT A/C MOTORS FOR THE CABIN PRESSURE OUTFLOW VALVE ACTUATOR IAW MM 21-31-05.  OPS CHECKED GOOD, PRESSURIZED CABIN, ALL SYS NORMAL RT PACK FLOW NORMAL AND COLD NO DEFECTS NOTED WITH RT & LT PACKS.

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