# SDR ASAA2020103133463

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2020
- Submitted: November 3, 2020
- Operation: Air carrier
- Aircraft: [N593AS](https://openairdocs.org/aircraft/N593AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35107
- Aircraft time: 46,756 hours, 14,100 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [8012 · Engine Start Valves/Controls](https://openairdocs.org/jasc/8012)
- Part: Start Valve
- Part number: 32896305
- Part serial: 9835
- Condition: Stuck
- Location: Nr 1 Engine
- Part time: 3,578 hours, 1,083 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020103133463

## Discrepancy

ON PUSHBACK, NR 1 ENGINE START VALVE OPENED UNCOMMANDED "START VALVE OPEN" LIGHT ILLUMINATED.  GROUNDED-YES.  PERFORMED B737-800 FIM  80-07 TASK 809, FOUND CONTINUITY FROM PIN (4) AND (5) OF START VALVE THIS INDICATES REPLACEMENT OF THE START VALVE.  REMOVED AND REPLACED NR 1 ENGINE START VALVE, PER B737-800 AMM 80-11-03-401.  LEAK TEST PERFORMED, PER AMM 71-00-00-700-809-F00.  NO LEAKS NOTED.

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