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Technician reported discovering the #2 engine high stage valve disconnected when installing the pressure regulating shut off valve.
| Attributes | |
| ACN | 1715834 |
| Time | |
| Date | 201912 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Pneumatic Valve/Bleed Valve |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance |
Narrative:
Installed #2 engine prsov (pressure regulating shut off valve) and on [the] following flight at station ZZZ; [the] high stage check valve was found disconnected. High stage valve is in general location of work performed but high stage check valve was never disturbed.
Original NASA ASRS Text
Title: Technician reported discovering the #2 engine high stage valve disconnected when installing the Pressure Regulating Shut Off Valve.
Narrative: Installed #2 engine PRSOV (Pressure Regulating Shut Off Valve) and on [the] following flight at station ZZZ; [the] high stage check valve was found disconnected. High stage valve is in general location of work performed but high stage check valve was never disturbed.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.