# SDR CALA2011100700651

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2011
- Submitted: October 7, 2011
- Operation: Air carrier
- Aircraft: [N16703](https://openairdocs.org/aircraft/N16703), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28764
- Aircraft time: 44,798 hours, 15,031 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074847
- Part serial: 10954
- Condition: Inoperative
- Location: Bleed Air Sys
- Part time: 7,616 hours, 2,835 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2011100700651

## Discrepancy

AT CRUISE AND CLIMB DUCT PRESSURE SPLIT OF 30 PSI L/12PSI R/46 PSI ON DESCENT R/35PSI L/8PSI CABIN VSI ON PRESSURIZATION PANEL FLUCTUATED FROM 0 CLIMB TO 1000 FT PER MIN T/S REF AMM 36-10 FOUND A/C TO BE OK.  RAN LEFT ENGINE AND ALL PRESSURE GOOD SEE L/P 8912767.

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