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A B727-200 was dispatched in non compliance after #3 slat actuator was replaced with no anti-rotation device installed on the actuator trunnion.
| Attributes | |
| ACN | 501873 |
| Time | |
| Date | 200102 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sea.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 12 |
| ASRS Report | 501873 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance lead technician : 16 |
| ASRS Report | 502446 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : work cards performance deficiency : installation |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | MAINT MANUAL |
Narrative:
A hydraulic leak was discovered on the lower surface of the left wing shortly before scheduled departure. I notified my lead. We replaced #3 slat actuator per the maintenance manual due to a leak at the retract restrictor fitting. Since the fitting had unthreaded from the trunnion, we were concerned how it was supposed to be retained. A search of the ipc and maintenance manual showed no parts were missing. The new actuator was installed per the maintenance manual and the plane was returned to service. Several days later, I learned that there should have been an anti-rotation fitting. I finally did find this in the illustrated parts catalog, but not in the maintenance manual. I notified my lead and maintenance coordinator to have the problem corrected on the aircraft. I have submitted a request to ensure that installing the anti-rotation fitting is specified in the maintenance manual.
Original NASA ASRS Text
Title: A B727-200 WAS DISPATCHED IN NON COMPLIANCE AFTER #3 SLAT ACTUATOR WAS REPLACED WITH NO ANTI-ROTATION DEVICE INSTALLED ON THE ACTUATOR TRUNNION.
Narrative: A HYD LEAK WAS DISCOVERED ON THE LOWER SURFACE OF THE L WING SHORTLY BEFORE SCHEDULED DEP. I NOTIFIED MY LEAD. WE REPLACED #3 SLAT ACTUATOR PER THE MAINT MANUAL DUE TO A LEAK AT THE RETRACT RESTRICTOR FITTING. SINCE THE FITTING HAD UNTHREADED FROM THE TRUNNION, WE WERE CONCERNED HOW IT WAS SUPPOSED TO BE RETAINED. A SEARCH OF THE IPC AND MAINT MANUAL SHOWED NO PARTS WERE MISSING. THE NEW ACTUATOR WAS INSTALLED PER THE MAINT MANUAL AND THE PLANE WAS RETURNED TO SVC. SEVERAL DAYS LATER, I LEARNED THAT THERE SHOULD HAVE BEEN AN ANTI-ROTATION FITTING. I FINALLY DID FIND THIS IN THE ILLUSTRATED PARTS CATALOG, BUT NOT IN THE MAINT MANUAL. I NOTIFIED MY LEAD AND MAINT COORDINATOR TO HAVE THE PROB CORRECTED ON THE ACFT. I HAVE SUBMITTED A REQUEST TO ENSURE THAT INSTALLING THE ANTI-ROTATION FITTING IS SPECIFIED IN THE MAINT MANUAL.
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.