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EMB120 flight crew has cabin pressurization malfunction, declares an emergency and descends to a lower altitude en route to rap.
| Attributes | |
| ACN | 593742 |
| Time | |
| Date | 200309 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : rap.airport |
| State Reference | SD |
| Altitude | msl bound lower : 10000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : commercial pilot : atp pilot : cfi pilot : instrument |
| Experience | flight time last 90 days : 186 flight time total : 4598 flight time type : 1225 |
| ASRS Report | 593742 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 100 flight time total : 1300 flight time type : 400 |
| ASRS Report | 594053 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : cabin alt warning other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : declared emergency |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
During cruise, a fluctuation in cabin rate of climb was observed. Lower altitude was requested and 17000 ft MSL was assigned. At approximately 20000-21000 ft MSL, the cabin rate of climb indicator spiked in climb and cabin altitude rose rapidly. Our memory items for 'cabin rapid depressurization' and 'emergency descent' were executed. Crew requests and is assigned 10000 ft MSL. 'Cabin altitude high' annunciator illuminates. All subsequent checklists were completed. Flight attendant and passenger have been on oxygen since cabin rate of climb spiked. Descent stopped at 10000 ft MSL and ATC advised no further assistance required. Landed without event at destination (rapid city). Postflt revealed cargo door lower seal blown out and hanging.
Original NASA ASRS Text
Title: EMB120 FLT CREW HAS CABIN PRESSURIZATION MALFUNCTION, DECLARES AN EMER AND DSNDS TO A LOWER ALT ENRTE TO RAP.
Narrative: DURING CRUISE, A FLUCTUATION IN CABIN RATE OF CLB WAS OBSERVED. LOWER ALT WAS REQUESTED AND 17000 FT MSL WAS ASSIGNED. AT APPROX 20000-21000 FT MSL, THE CABIN RATE OF CLB INDICATOR SPIKED IN CLB AND CABIN ALT ROSE RAPIDLY. OUR MEMORY ITEMS FOR 'CABIN RAPID DEPRESSURIZATION' AND 'EMER DSCNT' WERE EXECUTED. CREW REQUESTS AND IS ASSIGNED 10000 FT MSL. 'CABIN ALT HIGH' ANNUNCIATOR ILLUMINATES. ALL SUBSEQUENT CHKLISTS WERE COMPLETED. FLT ATTENDANT AND PAX HAVE BEEN ON OXYGEN SINCE CABIN RATE OF CLB SPIKED. DSCNT STOPPED AT 10000 FT MSL AND ATC ADVISED NO FURTHER ASSISTANCE REQUIRED. LANDED WITHOUT EVENT AT DEST (RAPID CITY). POSTFLT REVEALED CARGO DOOR LOWER SEAL BLOWN OUT AND HANGING.
Data retrieved from NASA's ASRS site as of July 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.