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B737 captain discovers the aircraft is not pressurizing passing 9300 feet during climb. After determining that the forward entry door seal is the culprit; the flight returns to the departure airport for an uneventful landing.
| Attributes | |
| ACN | 863324 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Exterior Pax/Crew Door |
| Person 1 | |
| Function | Captain Pilot Flying |
| Experience | Flight Crew Last 90 Days 140 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
The captain was the pilot flying and the first officer was the pilot monitoring (pm). Passing 9300' we both noticed we were not pressurizing. We had been cleared to fl 230 and I told the first officer to tell departure we needed to level off at 10;000'. As he was telling departure we needed to level off; we passed 10;100' and got the cabin alt warning horn. We both did the memory items for the 'cabin altitude warning/abnormal pressurization' and then went to the quick reference handbook (QRH) and completed the remaining items. The flight attendant called and stated he had a very loud noise coming from the fwd entry door. I told him we were not pressurizing and would be returning. I called operations and told them we were on our way back and asked them to tell maintenance we were coming. Departure gave us a decent to 4000' and a heading for downwind. Pm ran numbers for landing and all were good. Landing and roll out were uneventful.
Original NASA ASRS Text
Title: B737 Captain discovers the aircraft is not pressurizing passing 9300 feet during climb. After determining that the forward entry door seal is the culprit; the flight returns to the departure airport for an uneventful landing.
Narrative: The Captain was the Pilot Flying and the First Officer was the Pilot Monitoring (PM). Passing 9300' we both noticed we were not pressurizing. We had been cleared to FL 230 and I told the First Officer to tell Departure we needed to level off at 10;000'. As he was telling Departure we needed to level off; we passed 10;100' and got the cabin alt warning horn. We both did the memory items for the 'Cabin Altitude Warning/Abnormal Pressurization' and then went to the Quick Reference Handbook (QRH) and completed the remaining items. The Flight Attendant called and stated he had a very loud noise coming from the fwd entry door. I told him we were not pressurizing and would be returning. I called Operations and told them we were on our way back and asked them to tell Maintenance we were coming. Departure gave us a decent to 4000' and a heading for downwind. PM ran numbers for landing and all were good. Landing and roll out were uneventful.
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.