 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A bae 125 series 800 flight crew declared an emergency and returned to their departure airport when they were unable to pressurize the aircraft. Discovered the pressurization dump valve had been left open by maintenance personnel and the error was not detected by the first officer on the walkaround.
| Attributes | |
| ACN | 925890 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | BAe 125 Series 800 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization Outflow Valve |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 62 Flight Crew Total 9540 Flight Crew Type 610 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 80 Flight Crew Total 6400 Flight Crew Type 590 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
On initial climb noticed the cabin pressure rising. Plane sounded noisier than normal. Passing 20;000 ft declared an emergency and asked ATC for a descent to 10;000 ft. [We] accomplished an emergency descent. Noticed the cabin dump valve in the open position (must be closed for cabin to pressurize). Went to a holding pattern and accomplished normal/emergency checklist. [We] landed uneventfully at our departure airport.the copilot looked at the dump valve position during preflight checks and did not notice it was open versus closed. Normally the dump valve is always in the closed position. Maintenance had opened the dump valve to accomplish maintenance checks.
Original NASA ASRS Text
Title: A BAe 125 Series 800 flight crew declared an emergency and returned to their departure airport when they were unable to pressurize the aircraft. Discovered the pressurization dump valve had been left open by maintenance personnel and the error was not detected by the First Officer on the walkaround.
Narrative: On initial climb noticed the cabin pressure rising. Plane sounded noisier than normal. Passing 20;000 FT declared an emergency and asked ATC for a descent to 10;000 FT. [We] accomplished an emergency descent. Noticed the cabin dump valve in the OPEN position (must be closed for cabin to pressurize). Went to a holding pattern and accomplished normal/emergency checklist. [We] landed uneventfully at our departure airport.The copilot looked at the dump valve position during preflight checks and did not notice it was open versus closed. Normally the dump valve is always in the closed position. Maintenance had opened the dump valve to accomplish maintenance checks.
Data retrieved from NASA's ASRS site as of April 2012 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.