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An airbus 320 returned to the field due to unable to pressurize cabin. Caused by capped ambient pressure port on the pressurization controller.
| Attributes | |
| ACN | 573008 |
| Time | |
| Date | 200302 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | pilot : private technician : powerplant technician : airframe technician : fcc |
| Experience | maintenance avionics : 5 maintenance technician : 16 |
| ASRS Report | 573008 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : cabin pressure indication other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On feb/sat/03, I replaced #1 cabin pressure controller per the maintenance manual. I had trouble installing the controller into the rack and was distraction enough to omit the step to remove a cap from the ambient pressure port of the controller. This omission caused the cabin pressure to not pressurize the cabin resulting in mask down and an air turn back.
Original NASA ASRS Text
Title: AN AIRBUS 320 RETURNED TO THE FIELD DUE TO UNABLE TO PRESSURIZE CABIN. CAUSED BY CAPPED AMBIENT PRESSURE PORT ON THE PRESSURIZATION CTLR.
Narrative: ON FEB/SAT/03, I REPLACED #1 CABIN PRESSURE CTLR PER THE MAINT MANUAL. I HAD TROUBLE INSTALLING THE CTLR INTO THE RACK AND WAS DISTR ENOUGH TO OMIT THE STEP TO REMOVE A CAP FROM THE AMBIENT PRESSURE PORT OF THE CTLR. THIS OMISSION CAUSED THE CABIN PRESSURE TO NOT PRESSURIZE THE CABIN RESULTING IN MASK DOWN AND AN AIR TURN BACK.
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.