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After departing with a properly deferred right pack the flight crew of a B737-700 suffered the loss of the left pack climbing through 14000 feet. They declared an emergency; completed the appropriate QRH procedure; and returned to their departure airport.
| Attributes | |
| ACN | 916752 |
| Time | |
| Date | 201010 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Air Conditioning and Pressurization Pack |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
The right pack was deferred and we had complied with MEL checklist. After a normal takeoff and initial climb to 14000 feet; we received a left pack trip off light. We descended to 10000 feet. As PNF; I complied with QRH checklist. The pack would not reset. The captain declared an emergency and we returned to [departure airport] without incident. The cabin altitude never exceeded 8000 feet.I felt that the QRH checklist for a pack trip off was a little confusing.
Original NASA ASRS Text
Title: After departing with a properly deferred right pack the Flight Crew of a B737-700 suffered the loss of the left pack climbing through 14000 feet. They declared an emergency; completed the appropriate QRH procedure; and returned to their departure airport.
Narrative: The right pack was deferred and we had complied with MEL checklist. After a normal takeoff and initial climb to 14000 feet; we received a Left Pack Trip Off light. We descended to 10000 feet. As PNF; I complied with QRH checklist. The pack would not reset. The Captain declared an emergency and we returned to [departure airport] without incident. The cabin altitude never exceeded 8000 feet.I felt that the QRH checklist for a PACK TRIP OFF was a little confusing.
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.