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Uncontrollable loss of pressurization caused flight crew to make emergency descent with reclrnc. Flight continued to destination at lower altitude.
| Attributes | |
| ACN | 116914 |
| Time | |
| Date | 198907 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rbl |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 6300 flight time type : 2300 |
| ASRS Report | 116914 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem flight crew : exited adverse environment |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
At FL310 of rbl, lost cabin pressurization. I (the copilot) was flying and the captain directed me to fly the aircraft. He would accomplish the checklists. We performed the 'rapid depressurization' checklist but were unable to control loss of pressurization. At a cabin altitude of 10,000' performed the 'explosive depressurization' checklist, requested a lower altitude from ZOA, and initiated an emergency descent to 11,000' (traffic) at 10,000'. Evaluated the situation (aircraft condition, pas condition, WX, fuel, etc) and continued toward our destination (kpdx). Landed without incident at pdx with no damage or injury. Post-flight inspection revealed we had lost a section of the forward cargo door seal. Immediate decision of captain to specify which pilot was to fly the aircraft and which pilot would perform the checklists was instrumental in clarifying roles and helped ensure smooth cockpit coordination.
Original NASA ASRS Text
Title: UNCONTROLLABLE LOSS OF PRESSURIZATION CAUSED FLT CREW TO MAKE EMERGENCY DESCENT WITH RECLRNC. FLT CONTINUED TO DESTINATION AT LOWER ALT.
Narrative: AT FL310 OF RBL, LOST CABIN PRESSURIZATION. I (THE COPLT) WAS FLYING AND THE CAPT DIRECTED ME TO FLY THE ACFT. HE WOULD ACCOMPLISH THE CHECKLISTS. WE PERFORMED THE 'RAPID DEPRESSURIZATION' CHECKLIST BUT WERE UNABLE TO CONTROL LOSS OF PRESSURIZATION. AT A CABIN ALT OF 10,000' PERFORMED THE 'EXPLOSIVE DEPRESSURIZATION' CHECKLIST, REQUESTED A LOWER ALT FROM ZOA, AND INITIATED AN EMER DSCNT TO 11,000' (TFC) AT 10,000'. EVALUATED THE SITUATION (ACFT CONDITION, PAS CONDITION, WX, FUEL, ETC) AND CONTINUED TOWARD OUR DEST (KPDX). LANDED WITHOUT INCIDENT AT PDX WITH NO DAMAGE OR INJURY. POST-FLT INSPECTION REVEALED WE HAD LOST A SECTION OF THE FORWARD CARGO DOOR SEAL. IMMEDIATE DECISION OF CAPT TO SPECIFY WHICH PLT WAS TO FLY THE ACFT AND WHICH PLT WOULD PERFORM THE CHECKLISTS WAS INSTRUMENTAL IN CLARIFYING ROLES AND HELPED ENSURE SMOOTH COCKPIT COORD.
Data retrieved from NASA's ASRS site as of August 2007 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.