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A B767-400 had maintenance performed on the right engine reverser. Technician inadvertently reinstalled cover plates on both center drive units backwards; locking out the thrust reversers. Dispatched with engine reverser inoperative.
| Attributes | |
| ACN | 692942 |
| Time | |
| Date | 200603 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767-400 and 400 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : fcc technician : powerplant |
| Experience | maintenance technician : 6 |
| ASRS Report | 692942 |
| 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 : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : right reverser warning other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : scheduled maintenance performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : unqualified personnel performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Deployed right thrust reverser half on #1 engine and both thrust reverser halves on #2 engine for maintenance. After completion; stowed all back manually. Reinstalled cover plates on CDU's inadvertently backwards; thus unintentionally locking out both thrust reversers.
Original NASA ASRS Text
Title: A B767-400 HAD MAINT PERFORMED ON THE R ENG REVERSER. TECHNICIAN INADVERTENTLY REINSTALLED COVER PLATES ON BOTH CTR DRIVE UNITS BACKWARDS; LOCKING OUT THE THRUST REVERSERS. DISPATCHED WITH ENG REVERSER INOP.
Narrative: DEPLOYED R THRUST REVERSER HALF ON #1 ENG AND BOTH THRUST REVERSER HALVES ON #2 ENG FOR MAINT. AFTER COMPLETION; STOWED ALL BACK MANUALLY. REINSTALLED COVER PLATES ON CDU'S INADVERTENTLY BACKWARDS; THUS UNINTENTIONALLY LOCKING OUT BOTH THRUST REVERSERS.
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.