AN EMB140 FO'S SEAT WAS REPLACED PER THE MAINT MANUAL; BUT FAILED TO INSTALL THE CRASH AX AND AX MOUNTING ATTACHED TO THE SEAT.

Narrative

AT HANGAR; I WAS TRAINING A NEW MECH IN HOW TO REMOVE AND REINSTALL A PLT/COPLT SEAT. THE WORK WAS REQUIRED ON THE ACFT TO FIX AN MEL FOR A COPLT'S SEAT THAT WOULD NOT ADJUST SIDE-TO-SIDE. I FOUND THAT THE ADJUSTING CABLE FOR SIDE-TO-SIDE MOVEMENT WAS BROKEN. I PULLED THE PAPERWORK FOR REPLACING THE SEAT AND SHOWED THE PROCESS FOR REMOVAL. THE SEAT WAS REMOVED; AND WE ORDERED THE CABLE. A CABLE WAS RECEIVED BUT IT WAS THE WRONG LENGTH. WE ORDERED A NEW SEAT AND IT WAS ISSUED. WE INSTALLED THE NEW SEAT; SIGNED OFF THE INSTALLATION; AND I CO-SIGNED BEHIND HIM. WE CALLED FOR QUALITY ASSURANCE TO INSPECT. IN THE PROCESS; WE MISSED THE PORTION OF THE AMM WHICH SAID TO MAKE SURE A CRASH AX WAS INSTALLED ON THE COPLT'S SEAT. QUALITY ASSURANCE INSPECTED THE INSTALLATION AND WE WENT TO WORK ON OTHER NON ROUTINE WORK CARD JOBS. AROUND XA45 I WAS IN THE COMPUTER ROOM LOOKING UP A PART FOR ANOTHER ACFT WHEN THE NEXT SHIFT SUPVR ASKED ME IF I HAD WORKED ON ACFT. HE SAID THEY COULD NOT FIND THE CRASH AX AND I SAID IT HAD PROBABLY NOT BEEN MOVED IN THE NEW SEAT AND WAS STILL ON THE OLD ONE. WE LOCATED THE AX AND IT WAS SENT TO THE LINE. SHORTLY AFTER THAT; WE GOT THE CALL THAT THERE WAS NO MOUNTING HARDWARE ON THE NEW SEAT EITHER. THAT WAS REMOVED AND I TOOK THE PIECES TO THE LINE. I ARRIVED AT THE ACFT; INSTALLED THE HARDWARE AND AX AND SIGNED THE WRITE-UP AS COMPLETE. AS I FINISHED; I HEARD THE PLT AND COPLT TELLING THEIR CTLR THAT THEY WERE FIXED AND READY TO GO. CTLR TOLD THEM THAT THE FLT HAD BEEN SWAPPED TO A NEW ACFT. AS I WAS LEAVING; AN ARGUMENT STARTED BTWN THEM AND CTLR ABOUT WHY SHOULD THEY CHANGE OUT OF A PERFECTLY SVCABLE ACFT WITH PAX AND BAGS ALREADY LOADED. I ARRIVED BACK AT THE HANGAR AROUND XB10.