A B737-300 WAS DISPATCHED WITH AN 'A' CHK NOT ACCOMPLISHED. CHK WAS ADDED WHILE ACFT WAS OTS FOR A STRUCTURAL REPAIR.

Narrative

THIS ACFT WAS A LEFTOVER FROM HANGAR ROUTINE OVERNIGHT. IT HAD A CRACK ON THE L SIDE OF THE FUSELAGE. ON TURNOVER; HANGAR ROUTINE OVERNIGHT STATED TO ME THE PACKAGE WAS COMPLETE; ALL BUT THE CRACK IN THE FUSELAGE AND THE AFT CARGO WHERE THEY REMOVED SIDEWALL PANELS TO DO THE REPAIR. WHEN THE REPAIR WAS DONE; WE CLOSED THE CARGO BIN UP AND ALL THE PAPERWORK FOR OUR SHIFT WAS COMPLETED INCLUDING LEAK CHK ON ENGS AND CLOSING THE COWLINGS. AT THIS POINT I DID NOT KNOW ABOUT THE SECOND COVER SHEET AND I DID NOT KNOW OF AN 'A' CHK IN THE PACKAGE. THERE WERE MORE BLOCKS ON THE 'A' CHK FOR CLOSING OF THE COWLINGS AND LEAK CHKS OF THE ENGS -- DUPLICATE PAPERWORK WHICH I WAS UNAWARE OF. POSSIBLE CAUSE OF THIS EVENT COULD HAVE BEEN THE LACK OF A MORE THOROUGH TIE-IN; ME NOT LOOKING AT THE PAPERWORK CLOSELY ENOUGH; AND THE LACK OF A SECOND AND THIRD PAIR OF EYES ON THE PAPERWORK. THIS PROB COULD HAVE BEEN PREVENTED IF A SECOND PERSON WOULD HAVE GONE THROUGH THE PACKAGE AND WHEN A PACKAGE IS THIS LARGE; IT SHOULD HAVE GONE THROUGH A COORDINATOR TO BE INSPECTED BEFORE THE AIRPLANE WAS EVER RELEASED. ADDITIONALLY; IF THIS AIRPLANE HAD BEEN ON THE COMPUTER PROGRAM IT COULD NEVER HAVE LEFT THE HANGAR WITH ANYTHING OPEN. WE USE THE COMPUTER PROGRAM IN STRUCTURES AND 'B' AND 'C' CHKS. IF HANGAR ROUTINE OVERNIGHT WERE USING THE COMPUTER PROGRAM THIS PROB NEVER WOULD HAVE OCCURRED BECAUSE THE COMPUTER PROGRAM WILL NOT ALLOW THE PACKAGE TO BE CLOSED UNLESS EVERY BLOCK IS FILLED OUT.