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A first officer reports about the captain disappearing in a 'dark; white' vapor cloud in the B737-700 cockpit after deicing was completed; engines started and the engine bleeds were turned 'on'. Pack switches were 'off'. First officer noted the vapor cloud was so thick; it was like flying IFR in the cockpit.
| Attributes | |
| ACN | 876880 |
| Time | |
| Date | 201003 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Engine Air |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor |
Narrative:
After deicing approximately 3/4 of the airplane; the deice truck broke down and the maintenance crew had to find another; which took approximately 45 minutes; perhaps longer. We kept the airplane on the deice pad in the deice configuration while waiting. Maintenance proceeded to deice the entire airplane again. After both engines were started; approximately one and a half minutes had elapsed before the bleeds were configured for takeoff. Shortly after turning 'on' the number one engine bleed air switch; the cockpit was enveloped in a dark white vapor. We immediately turned 'off' all of the bleed switches and donned oxygen masks. The vapor stopped almost immediately. The cabin crew reported no signs of vapor; smoke or odor. Proceeded back to the gate where the passengers were deplaned. Waiting for maintenance report. The cause is still unknown at this time.
Original NASA ASRS Text
Title: A First Officer reports about the Captain disappearing in a 'dark; white' vapor cloud in the B737-700 cockpit after deicing was completed; engines started and the engine Bleeds were turned 'On'. Pack switches were 'Off'. First Officer noted the vapor cloud was so thick; it was like flying IFR in the cockpit.
Narrative: After deicing approximately 3/4 of the airplane; the Deice truck broke down and the Maintenance crew had to find another; which took approximately 45 minutes; perhaps longer. We kept the airplane on the deice pad in the deice configuration while waiting. Maintenance proceeded to deice the entire airplane again. After both engines were started; approximately one and a half minutes had elapsed before the bleeds were configured for Takeoff. Shortly after turning 'ON' the Number one engine bleed air switch; the cockpit was enveloped in a dark white vapor. We immediately turned 'Off' all of the bleed switches and donned oxygen masks. The vapor stopped almost immediately. The Cabin crew reported no signs of vapor; smoke or odor. Proceeded back to the gate where the passengers were deplaned. Waiting for Maintenance report. The cause is still unknown at this time.
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.