# SDR ASAA2017072121445

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2017
- Submitted: July 24, 2017
- Operation: Air carrier
- Aircraft: [N597AS](https://openairdocs.org/aircraft/N597AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35689
- Aircraft time: 35,413 hours, 10,929 cycles
- System (JASC): [8012 · Engine Start Valves/Controls](https://openairdocs.org/jasc/8012)
- Part: Start Valve
- Part number: 32896302
- Part serial: 9940
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 39,817 hours, 11,888 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017072121445

## Discrepancy

DURING NR 1 ENGINE START, VERY LOW N2 ROTATION TOPPING OUT AT 2.7%.  START VALVE OPEN LIGHT DID ILLUMINATE.  ACFT GROUNDED.  REMOVED & REPLACED THE NR 1 START VALVE. OPS CHECKED GOOD.

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