Narrative:

On dec/xa/98 at XA30, I was assigned to finish a #2 service started by the taxi crew. The taxi crew also initiated write-up on #4 front brake for being worn, which I was assigned as well. The aircraft was scheduled for #2 engine borescope which was assigned to 2 other mechanics. At the time aircraft arrived to hangar (at XA30) it was stressed to us by the manager that the aircraft had to be pushed out of hangar at XE00 for scheduled trip. I had to work through lunch to accomplish all checks and brake change before XE00. I started the brake change by myself. After performing final torque on wheel nut and installation of safety bolt, I installed the hub cap and clamp on wheel while the other mechanic put away our support equipment. At XD45, while performing a final walkaround and closing landing gear doors, I discovered a hydraulic leak from horizontal stabilizer compartment. After troubleshooting the leak down to a lower horizontal stabilizer trim valve, the manager told us to ride the aircraft to gate and fix it there. We turned the aircraft over to gate mechanic at XF30. On dec/xb/98 around XA00, I was informed that the #4 front hub cap had fallen off the wheel while being pushed back from the gate for a live trip. The aircraft was brought back to chocks and a new clamp was installed, delaying the trip for another hour. The old clamp was found outside of hangar sometime dec/xb/98 in the evening. I was shown the clamp which was severely damaged due to aircraft rolling over it. I noticed the nut being backed off all the way to the end of threads. I remember, I didn't have to unscrew the nut that far back to remove the clamp or to install it.

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Original NASA ASRS Text

Title: A DC10-10 BEING PUSHED OFF A GATE FOR TRIP DISPATCH HAD THE #4 FRONT WHEEL HUB CAP FALL OFF DUE TO IMPROPER INSTALLATION.

Narrative: ON DEC/XA/98 AT XA30, I WAS ASSIGNED TO FINISH A #2 SVC STARTED BY THE TAXI CREW. THE TAXI CREW ALSO INITIATED WRITE-UP ON #4 FRONT BRAKE FOR BEING WORN, WHICH I WAS ASSIGNED AS WELL. THE ACFT WAS SCHEDULED FOR #2 ENG BORESCOPE WHICH WAS ASSIGNED TO 2 OTHER MECHS. AT THE TIME ACFT ARRIVED TO HANGAR (AT XA30) IT WAS STRESSED TO US BY THE MGR THAT THE ACFT HAD TO BE PUSHED OUT OF HANGAR AT XE00 FOR SCHEDULED TRIP. I HAD TO WORK THROUGH LUNCH TO ACCOMPLISH ALL CHKS AND BRAKE CHANGE BEFORE XE00. I STARTED THE BRAKE CHANGE BY MYSELF. AFTER PERFORMING FINAL TORQUE ON WHEEL NUT AND INSTALLATION OF SAFETY BOLT, I INSTALLED THE HUB CAP AND CLAMP ON WHEEL WHILE THE OTHER MECH PUT AWAY OUR SUPPORT EQUIP. AT XD45, WHILE PERFORMING A FINAL WALKAROUND AND CLOSING LNDG GEAR DOORS, I DISCOVERED A HYD LEAK FROM HORIZ STABILIZER COMPARTMENT. AFTER TROUBLESHOOTING THE LEAK DOWN TO A LOWER HORIZ STABILIZER TRIM VALVE, THE MGR TOLD US TO RIDE THE ACFT TO GATE AND FIX IT THERE. WE TURNED THE ACFT OVER TO GATE MECH AT XF30. ON DEC/XB/98 AROUND XA00, I WAS INFORMED THAT THE #4 FRONT HUB CAP HAD FALLEN OFF THE WHEEL WHILE BEING PUSHED BACK FROM THE GATE FOR A LIVE TRIP. THE ACFT WAS BROUGHT BACK TO CHOCKS AND A NEW CLAMP WAS INSTALLED, DELAYING THE TRIP FOR ANOTHER HR. THE OLD CLAMP WAS FOUND OUTSIDE OF HANGAR SOMETIME DEC/XB/98 IN THE EVENING. I WAS SHOWN THE CLAMP WHICH WAS SEVERELY DAMAGED DUE TO ACFT ROLLING OVER IT. I NOTICED THE NUT BEING BACKED OFF ALL THE WAY TO THE END OF THREADS. I REMEMBER, I DIDN'T HAVE TO UNSCREW THE NUT THAT FAR BACK TO REMOVE THE CLAMP OR TO INSTALL IT.

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.