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Air carrier flight crew experiences uncontrollable pressurization failure during climb to cruise. Declares emergency, descends and returns uneventfully to departure station.
| Attributes | |
| ACN | 437287 |
| Time | |
| Date | 199905 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sju.airport |
| State Reference | PR |
| Altitude | msl single value : 30000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zsu.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Route In Use | enroute other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 437287 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : landed in emergency condition flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
ATC facility: sju center. Location: sju/320 degrees 180 NM. Climbing through 30000 ft detected cabin pressurization change. Cabin rate pegged at 2000 FPM and corresponding cabin altitude climb. Performed rapid depressurization checklist, no change in situation. Declared an emergency and started a descent. Cabin approaching 10000 ft and performed explosive depressurization checklist. Leveled at 10000 ft and return to sju. Never able to regain control of pressurization system. Returned to sju uneventful.
Original NASA ASRS Text
Title: ACR FLC EXPERIENCES UNCONTROLLABLE PRESSURIZATION FAILURE DURING CLB TO CRUISE. DECLARES EMER, DSNDS AND RETURNS UNEVENTFULLY TO DEP STATION.
Narrative: ATC FACILITY: SJU CTR. LOCATION: SJU/320 DEGS 180 NM. CLBING THROUGH 30000 FT DETECTED CABIN PRESSURIZATION CHANGE. CABIN RATE PEGGED AT 2000 FPM AND CORRESPONDING CABIN ALT CLB. PERFORMED RAPID DEPRESSURIZATION CHKLIST, NO CHANGE IN SIT. DECLARED AN EMER AND STARTED A DSCNT. CABIN APCHING 10000 FT AND PERFORMED EXPLOSIVE DEPRESSURIZATION CHKLIST. LEVELED AT 10000 FT AND RETURN TO SJU. NEVER ABLE TO REGAIN CTL OF PRESSURIZATION SYS. RETURNED TO SJU UNEVENTFUL.
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.