What was found
AIRCRAFT WAS GROUNDED: START VALVE OPEN LIGHT IN FLIGHT. DECESION MADE TO RETURN TO PHX, EMERGENCY DECLARED AND AIRCRAT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED ENG 1 START VALVE IAW AMM 80-11-03. .
- Difficulty date
- August 29, 2026
- Submitted
- August 30, 2026
- Operation
- Air carrier
- Aircraft
- N929NN
- Make and model
- Boeing 737823
- Aircraft serial
- 33322
- System (JASC)
- 8012 · Engine Start Valves/Controls
- Part
- Start Valve
- Part number
- 32896302
- Part serial
- 17515
- Condition
- Stuck
- Location
- Nr 1 Engine
- Part time
- 29,422 hours, 12,855 cycles
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.