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A B767 had 2 separate procedures for testing the passenger service unit oxygen mask deployment. One procedure drop tests the door 1 inch. Other test drops door fully open. Technician reports door fully open is the better test.
| Attributes | |
| ACN | 697685 |
| Time | |
| Date | 200511 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 697685 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 697686 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far non adherence : company policies |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : logbook entry performance deficiency : testing performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
A deferral was issued to inspect seat passenger service units for obstruction to prevent masks from dropping. I dropped passenger service units as per deferral at 1 inch and did not see any discrepancies. Read engineering change order and discussed situation with supervisor. Deferral instructions were different than engineering change order that was issued. Engineering change order should have been issued instead of deferral. Engineering change order says to fully drop passenger service unit door. Deferral says drop minimum of 1 inch.
Original NASA ASRS Text
Title: A B767 HAD 2 SEPARATE PROCS FOR TESTING THE PAX SVC UNIT OXYGEN MASK DEPLOYMENT. ONE PROC DROP TESTS THE DOOR 1 INCH. OTHER TEST DROPS DOOR FULLY OPEN. TECHNICIAN RPTS DOOR FULLY OPEN IS THE BETTER TEST.
Narrative: A DEFERRAL WAS ISSUED TO INSPECT SEAT PAX SVC UNITS FOR OBSTRUCTION TO PREVENT MASKS FROM DROPPING. I DROPPED PAX SVC UNITS AS PER DEFERRAL AT 1 INCH AND DID NOT SEE ANY DISCREPANCIES. READ ENGINEERING CHANGE ORDER AND DISCUSSED SITUATION WITH SUPVR. DEFERRAL INSTRUCTIONS WERE DIFFERENT THAN ENGINEERING CHANGE ORDER THAT WAS ISSUED. ENGINEERING CHANGE ORDER SHOULD HAVE BEEN ISSUED INSTEAD OF DEFERRAL. ENGINEERING CHANGE ORDER SAYS TO FULLY DROP PAX SVC UNIT DOOR. DEFERRAL SAYS DROP MINIMUM OF 1 INCH.
Data retrieved from NASA's ASRS site as of January 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.