 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B737-300 flight crew has loss of pressurization during cruise; declares emergency; descends and lands.
| Attributes | |
| ACN | 722136 |
| Time | |
| Date | 200612 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 36000 |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc tower : luk.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 215 flight time total : 21000 flight time type : 10500 |
| ASRS Report | 722136 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 193 flight time total : 7400 flight time type : 1727 |
| ASRS Report | 722137 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : cabin press warning other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport flight crew : landed as precaution |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Altitude FL360. Over ZZZ heard a loud rush of air. 15-20 seconds later; cabin pressurization rate gauge increased from zero to pegged (4000 FPM). Immediately put oxygen masks on. (Before 10000 ft cabin altitude and altitude warning horn.) accomplished qrc for rapid depressurization. Declared an emergency. Accomplished qrc for emergency descent. Evaluated airport for diversion. Diverted to ZZZ1. Descended to 15000 ft MEA. At 15000 ft; the increased thrust provided enough air supply to regain some control of the cabin pressurization. With power up; and both packs in high flow; and outflow valve closed; had about -300 FPM rate of descent for the cabin pressurization. Normal; uneventful approach and landing.
Original NASA ASRS Text
Title: B737-300 FLT CREW HAS LOSS OF PRESSURIZATION DURING CRUISE; DECLARES EMER; DSNDS AND LANDS.
Narrative: ALT FL360. OVER ZZZ HEARD A LOUD RUSH OF AIR. 15-20 SECONDS LATER; CABIN PRESSURIZATION RATE GAUGE INCREASED FROM ZERO TO PEGGED (4000 FPM). IMMEDIATELY PUT OXYGEN MASKS ON. (BEFORE 10000 FT CABIN ALT AND ALT WARNING HORN.) ACCOMPLISHED QRC FOR RAPID DEPRESSURIZATION. DECLARED AN EMER. ACCOMPLISHED QRC FOR EMER DSCNT. EVALUATED ARPT FOR DIVERSION. DIVERTED TO ZZZ1. DSNDED TO 15000 FT MEA. AT 15000 FT; THE INCREASED THRUST PROVIDED ENOUGH AIR SUPPLY TO REGAIN SOME CTL OF THE CABIN PRESSURIZATION. WITH PWR UP; AND BOTH PACKS IN HIGH FLOW; AND OUTFLOW VALVE CLOSED; HAD ABOUT -300 FPM RATE OF DSCNT FOR THE CABIN PRESSURIZATION. NORMAL; UNEVENTFUL APCH AND LNDG.
Data retrieved from NASA's ASRS site as of January 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.