# SDR ASAA1159191

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2011
- Submitted: March 10, 2011
- Operation: Air carrier
- Aircraft: [N560AS](https://openairdocs.org/aircraft/N560AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35179
- Aircraft time: 17,276 hours, 5,389 cycles
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Sense Line
- Part number: 1613580
- Condition: Leaking
- Location: Bleed Air Sys
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1159191

## Discrepancy

NR 1 ENGINE PRECOOLER CONTROL VALVE FAILED INSTALLATION TEST PER AMM 36 12 02 400 801 STEP G.  DETERMINED PRECOOLER CONTROL VALVE IS EFFECTIVE FOR AIRCRAFT.  REMOVED AND REPLACED NR 1 ENG PRECOOLER CONTROL VALVE IAW ASA AMM 36 12 02 000 801 AND AMM 36 12 02 400 801 PERFORMED A GOOD INSTALLATION TEST IAW ASA AMM 36 12 02 400 801.  UPON FURTHER INVESTIGATIONS FOUND PRECOOLER CONTROL VALVE SENSE LINE P/N 16135 80 GOING TO THE PRECOOLER CONTROL VALVE SENSOR LEAKING AIR THRU THE WIRE BRAIDS.  REMOVED AND REPLACED THE PRECOOLER CONTROL VALVE SENSE LINE P/N 16135 80 PER M/M 20 10 52 000 801 AN DM/M 20 10 52 400 801.

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