 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
An MD80 flight crew experienced a pressurization failure in climb. They declared an emergency and returned to departure airport.
| Attributes | |
| ACN | 803057 |
| Time | |
| Date | 200809 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl single value : 25000 |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 803057 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 803663 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | aircraft equipment other aircraft equipment : cabin altimeter other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Ambiguous |
Narrative:
We took a delay at the gate because the inbound crew wrote up a pressurization flow light during descent into ZZZ. Maintenance we believe corrects the problem. During climb out; passing FL240-FL250; we get a pressurization flow light. I look up and see the cabin climbing; the outflow valve is fully closed and the left pack air flow is zero. Also; the right pack is on placard as inoperative. I declared an emergency with ZZZ center; asked for descent to 10000 ft and a heading back to ZZZ. I believe the cabin never got above 9000 ft so the masks did not drop. We make an uneventful landing at ZZZ. They take the aircraft OTS.
Original NASA ASRS Text
Title: AN MD80 FLT CREW EXPERIENCED A PRESSURIZATION FAILURE IN CLIMB. THEY DECLARED AN EMERGENCY AND RETURNED TO DEP ARPT.
Narrative: WE TOOK A DELAY AT THE GATE BECAUSE THE INBOUND CREW WROTE UP A PRESSURIZATION FLOW LIGHT DURING DSCNT INTO ZZZ. MAINT WE BELIEVE CORRECTS THE PROB. DURING CLBOUT; PASSING FL240-FL250; WE GET A PRESSURIZATION FLOW LIGHT. I LOOK UP AND SEE THE CABIN CLBING; THE OUTFLOW VALVE IS FULLY CLOSED AND THE L PACK AIR FLOW IS ZERO. ALSO; THE R PACK IS ON PLACARD AS INOP. I DECLARED AN EMER WITH ZZZ CTR; ASKED FOR DSCNT TO 10000 FT AND A HDG BACK TO ZZZ. I BELIEVE THE CABIN NEVER GOT ABOVE 9000 FT SO THE MASKS DID NOT DROP. WE MAKE AN UNEVENTFUL LNDG AT ZZZ. THEY TAKE THE ACFT OTS.
Data retrieved from NASA's ASRS site as of May 2009 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.