Narrative:

On nov/thu/03 myself and another technician installed a flap control unit using maintenance manual. A couple weeks later the technician that removed the unit questioned me about input crank bolt being difficult to access. On dec/sun/03, I discussed this with the other technician that assisted on installation and we could not remember tightening the bolt in question. On dec/sun/03, we contacted our maintenance control to request a technical service item against aircraft to rechk security of bolt in question. Maintenance manual abc sub task 123, step #8. It was determined on the night of dec/sun/03 that bolt was tight. I fault myself for not signing turn-over report up to the step I completed instead of signing off complete installation.

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Original NASA ASRS Text

Title: A B737-400 WAS DISPATCHED AFTER A FLAP CTL UNIT WAS REPLACED. TECHNICIANS WHO REPLACED UNIT QUESTION WHETHER THE INPUT CRANK NUT WAS TORQUED.

Narrative: ON NOV/THU/03 MYSELF AND ANOTHER TECHNICIAN INSTALLED A FLAP CTL UNIT USING MAINT MANUAL. A COUPLE WKS LATER THE TECHNICIAN THAT REMOVED THE UNIT QUESTIONED ME ABOUT INPUT CRANK BOLT BEING DIFFICULT TO ACCESS. ON DEC/SUN/03, I DISCUSSED THIS WITH THE OTHER TECHNICIAN THAT ASSISTED ON INSTALLATION AND WE COULD NOT REMEMBER TIGHTENING THE BOLT IN QUESTION. ON DEC/SUN/03, WE CONTACTED OUR MAINT CTL TO REQUEST A TECHNICAL SVC ITEM AGAINST ACFT TO RECHK SECURITY OF BOLT IN QUESTION. MAINT MANUAL ABC SUB TASK 123, STEP #8. IT WAS DETERMINED ON THE NIGHT OF DEC/SUN/03 THAT BOLT WAS TIGHT. I FAULT MYSELF FOR NOT SIGNING TURN-OVER RPT UP TO THE STEP I COMPLETED INSTEAD OF SIGNING OFF COMPLETE INSTALLATION.

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.