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EMB135 flight crew experiences cabin altitude warning at FL370 and makes emergency descent to safe altitude. Previous write-up and repair.
| Attributes | |
| ACN | 785172 |
| Time | |
| Date | 200805 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 785172 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | aircraft equipment other aircraft equipment : cabin warning other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Approximately 100 NM west of cmh at FL370; felt ears pop; saw cabin altitude rapidly climbing through 10000 ft and got cabin warning. Put on oxygen masks; declared emergency with ATC and initiated descent to 10000 ft. During descent; cabin started pressurizing and got 'pressurization automatic fail' message. Toward bottom of descent; completed appropriate checklist in aom and pressurization operated normally in manual mode. Diverted to cmh. No injuries reported. Pressurization system had been previously written up and repaired. Felt ears pop; saw cabin altitude rapidly rising on EICAS; and got cabin warning aural and red warning light. Put on oxygen mask; established communication; descended to 10000 ft; and completed appropriate checklists.
Original NASA ASRS Text
Title: EMB135 FLT CREW EXPERIENCES CABIN ALTITUDE WARNING AT FL370 AND MAKES EMERGENCY DESCENT TO SAFE ALTITUDE. PREVIOUS WRITE-UP AND REPAIR.
Narrative: APPROX 100 NM W OF CMH AT FL370; FELT EARS POP; SAW CABIN ALT RAPIDLY CLBING THROUGH 10000 FT AND GOT CABIN WARNING. PUT ON OXYGEN MASKS; DECLARED EMER WITH ATC AND INITIATED DSCNT TO 10000 FT. DURING DSCNT; CABIN STARTED PRESSURIZING AND GOT 'PRESSURIZATION AUTO FAIL' MESSAGE. TOWARD BOTTOM OF DSCNT; COMPLETED APPROPRIATE CHKLIST IN AOM AND PRESSURIZATION OPERATED NORMALLY IN MANUAL MODE. DIVERTED TO CMH. NO INJURIES RPTED. PRESSURIZATION SYS HAD BEEN PREVIOUSLY WRITTEN UP AND REPAIRED. FELT EARS POP; SAW CABIN ALT RAPIDLY RISING ON EICAS; AND GOT CABIN WARNING AURAL AND RED WARNING LIGHT. PUT ON OXYGEN MASK; ESTABLISHED COM; DSNDED TO 10000 FT; AND COMPLETED APPROPRIATE CHKLISTS.
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.