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B737-800 flight crew experiences a cabin altitude warning horn passing 10;000 ft during climb. Before the aircraft can be leveled the passenger oxygen masks deploy. Rushed approaches result in two go arounds before an emergency is declared and a successful landing ensues. Engine bleeds were 'discovered' in the 'off' position.
| Attributes | |
| ACN | 944617 |
| Time | |
| Date | 201104 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pneumatic Valve/Bleed Valve |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Person 2 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Climbing out; we received a cabin altitude warning and began a descent below 10;000 ft and requested a return. As a rapid climbout was happening; the cabin altitude raised high enough to deploy the masks in the cabin before we could get back down below 10;000 ft. We were vectored back but were not slowed down and configured to land. Executed a go-around and were given vectors by the controllers back onto final. The weather was marginal VFR and maybe the controllers thought we could see the airport. There was confusion with ATC about how they wanted us back around. Discovered the bleeds were actually in the off position. Bleeds back on and feeling rushed around the pattern in a VFR/IFR situation while working checklist responses put me out of sync and forced another go-around. Third time around; emergency declared; captain made the approach and landing. Requested EMS meet us at the gate as a precaution. Contributing factors:1. Switches in this a/c opposite of my last airplane.2. Aircraft coming from the hangar.3. Checklist response (on a/c panel) 'set' might be better if 'on'4. Controller and weather issues complicating a text-book return for landing.
Original NASA ASRS Text
Title: B737-800 flight crew experiences a cabin altitude warning horn passing 10;000 FT during climb. Before the aircraft can be leveled the passenger oxygen masks deploy. Rushed approaches result in two go arounds before an emergency is declared and a successful landing ensues. Engine bleeds were 'discovered' in the 'off' position.
Narrative: Climbing out; we received a cabin altitude warning and began a descent below 10;000 FT and requested a return. As a rapid climbout was happening; the cabin altitude raised high enough to deploy the masks in the cabin before we could get back down below 10;000 FT. We were vectored back but were not slowed down and configured to land. Executed a go-around and were given vectors by the controllers back onto final. The weather was marginal VFR and maybe the controllers thought we could see the airport. There was confusion with ATC about how they wanted us back around. Discovered the bleeds were actually in the off position. Bleeds back on and feeling rushed around the pattern in a VFR/IFR situation while working checklist responses put me out of sync and forced another go-around. Third time around; emergency declared; Captain made the approach and landing. Requested EMS meet us at the gate as a precaution. Contributing Factors:1. Switches in this a/c opposite of my last airplane.2. Aircraft coming from the hangar.3. Checklist response (on a/c panel) 'set' Might be better if 'on'4. Controller and weather issues complicating a text-book return for landing.
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.