APU MOUNTING BOLT NOT INSTALLED.

Narrative

AFTER INSTALLING A NEW APU ON ACFT; I NOTICED A LARGE BOLT LYING ON THE BED OF THE LIFT. I COMMENTED TO MY FELLOW WORKERS THAT IT DID NOT SEEM PART OF THE APU. THEN I FORGOT ABOUT THE BOLT. AT OUR SHIFT END; WE DISCUSSED WITH EARLY GRAVE AS TO THE FUNCTION OF THE BOLT. LOOKING AT THE MAINT MANUAL; WE SAW THAT IT WAS A SAFETY BOLT TO THE R AFT MOUNT. WE CALLED DOWN LINE MAINT TO HAVE THE BOLT INSTALLED. I DID NOT LOOK AT THE MAINT MANUAL TO PREVENT OCCURRENCE. FROM NOW ON I WILL PRINT MY COPY OF WORK BEING DONE AND READ BEFORE AND AFTER JOB. SUPPLEMENTAL INFO FROM ACN 288027: I WAS GIVEN NO TURNOVER BECAUSE THE CREW THAT REMOVED APU HAD GONE HOME. THERE WERE PARTS ALL OVER. SOME FROM GENERATOR REMOVAL; SOME FROM APU. DURING INSTALLATION; THE SUPVR KEPT CHKING ON US AND ASKING HOW MUCH LONGER IT WAS SCHEDULED ON A REVENUE FLT. THE BOLT IS A SECONDARY MOUNT BOLT AND IT DIDN'T GET INSTALLED. REVIEW OF THE MAINT MANUAL CALLS FOR INSTALLING THE BOLT AND REFS A PICTURE. WE DIDN'T HAVE THAT PICTURE IN OUR PAPERWORK THAT THE PREVIOUS SHIFT PRINTED.