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An MD80 flight crew reports that during an MEL maintenance procedure the technicians failed to completely lock an inoperative thrust reverser. During the pushback procedure the first officer noticed that the reverser unlocked when hydraulic pressure was removed. The aircraft was towed back into the gate and the procedure was correctly accomplished.
| Attributes | |
| ACN | 366256 |
| Time | |
| Date | 199704 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 366256 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Aircraft arrived at dfw with a write-up about left thrust reverser accumulator low light on. After a few calls by us, maintenance arrived near our departure time. Maintenance personnel determined there was a leak in the left accumulator. They placarded the left thrust reverser inoperative, appropriate procedures were accomplished, and placards were installed in cockpit. The logbook was signed off showing all procedures accomplished according to MEL. After a few moments, maintenance gave a thumbs up, waved good-bye and left. During our pushback by a tug, the airplane moved about somewhat and my alert copilot noted the left reverser unlock light illuminate. We had the tug pull us back without starting our engines. Maintenance came out and after examination, stated that a locking device was not over center as it should be and the reverser could have deployed in-flight. They accomplished the procedure and we left for a normal flight.
Original NASA ASRS Text
Title: AN MD80 FLC RPTS THAT DURING AN MEL MAINT PROC THE TECHNICIANS FAILED TO COMPLETELY LOCK AN INOP THRUST REVERSER. DURING THE PUSHBACK PROC THE FO NOTICED THAT THE REVERSER UNLOCKED WHEN HYD PRESSURE WAS REMOVED. THE ACFT WAS TOWED BACK INTO THE GATE AND THE PROC WAS CORRECTLY ACCOMPLISHED.
Narrative: ACFT ARRIVED AT DFW WITH A WRITE-UP ABOUT L THRUST REVERSER ACCUMULATOR LOW LIGHT ON. AFTER A FEW CALLS BY US, MAINT ARRIVED NEAR OUR DEP TIME. MAINT PERSONNEL DETERMINED THERE WAS A LEAK IN THE L ACCUMULATOR. THEY PLACARDED THE L THRUST REVERSER INOP, APPROPRIATE PROCS WERE ACCOMPLISHED, AND PLACARDS WERE INSTALLED IN COCKPIT. THE LOGBOOK WAS SIGNED OFF SHOWING ALL PROCS ACCOMPLISHED ACCORDING TO MEL. AFTER A FEW MOMENTS, MAINT GAVE A THUMBS UP, WAVED GOOD-BYE AND LEFT. DURING OUR PUSHBACK BY A TUG, THE AIRPLANE MOVED ABOUT SOMEWHAT AND MY ALERT COPLT NOTED THE L REVERSER UNLOCK LIGHT ILLUMINATE. WE HAD THE TUG PULL US BACK WITHOUT STARTING OUR ENGS. MAINT CAME OUT AND AFTER EXAMINATION, STATED THAT A LOCKING DEVICE WAS NOT OVER CTR AS IT SHOULD BE AND THE REVERSER COULD HAVE DEPLOYED INFLT. THEY ACCOMPLISHED THE PROC AND WE LEFT FOR A NORMAL FLT.
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.