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An EMB120 loses its pressurization and leaves its assigned altitude. Crew declares an emergency with ATC on the way down.
| Attributes | |
| ACN | 434484 |
| Time | |
| Date | 199903 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : tys.airport |
| State Reference | TN |
| Altitude | msl single value : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc tower : atl.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Xingu EMB-121 All Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level cruise : enroute altitude change descent : vacating altitude |
| Route In Use | enroute airway : ns.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : commercial pilot : instrument pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 9500 flight time type : 5000 |
| ASRS Report | 434484 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor Aircraft |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Lost pressurization at FL250, executed emergency descent and deviated from last assigned altitude. Notified ZTL of emergency and vacating altitude.
Original NASA ASRS Text
Title: AN EMB120 LOSES ITS PRESSURIZATION AND LEAVES ITS ASSIGNED ALT. CREW DECLARES AN EMER WITH ATC ON THE WAY DOWN.
Narrative: LOST PRESSURIZATION AT FL250, EXECUTED EMER DSCNT AND DEVIATED FROM LAST ASSIGNED ALT. NOTIFIED ZTL OF EMER AND VACATING ALT.
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.