# SDR ASAA0956741

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2009
- Submitted: October 6, 2009
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 12,727 hours, 3,722 cycles
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Sense Line
- Part number: 1613583
- Condition: Leaking
- Location: Bleed Air Sys
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA0956741

## Discrepancy

FOLLOW UP TO REPORTS OF LT DUCT PRESS LOW ON CLIMBOUT AND CRUISE.  ACCOMPLISHED HEALTH CHECK LT PRECOOLER CONT VALVE.  CHECKS GOOD REF M/M 36 12 00 700 801.  FOUND LT PRSOV CONTROL PRESSURE SENSE LINE PART 16135 83 LEAKING.  REPLACED SENSE LINE.  OPS & LEAK CHECK GOOD REF M/M 36 11 00 101.  SEAMC NOTIFIED.

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