Narrative:

On may/fri/00, I rigged the left elevator tab on aircraft xyz per maintenance manual. Requested inspection for rig check and safeties, inspection agreed and I believed ok to close area. Unfortunately airworthiness directive #yx-wxxx, which was previously complied with, was not in the maintenance manual or tapes being used. Also the tab installation kit did not reflect the hardware required for this airworthiness directive yx-wxxx to be accomplished. Therefore the wrong castellated nut was installed. This discrepancy was found during accomplishment of a 'Q' check and brought to my attention. Callback conversation with reporter revealed the following information: the reporter stated the airworthiness directive installs a self locking castellated nut on the tab push rod. The reporter said the push rod kit from stock did not have this type nut but only a castellated nut and the maintenance manual was in accord with the kit. The reporter stated this push rod was installed. The reporter said later in a 'Q' check, it was discovered the self locking castellated nut was not installed and the airworthiness directive was found undone. The reporter stated that engineering was advised to revise the maintenance manual, tab and push rod replacement to reflect this airworthiness directive.

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Original NASA ASRS Text

Title: A B737-300LR WAS DISPATCHED IN NON COMPLIANCE WITH AN ELEVATOR TAB REPLACED PER THE MAINT MANUAL, BUT IN CONFLICT WITH AN AIRWORTHINESS DIRECTIVE.

Narrative: ON MAY/FRI/00, I RIGGED THE L ELEVATOR TAB ON ACFT XYZ PER MAINT MANUAL. REQUESTED INSPECTION FOR RIG CHK AND SAFETIES, INSPECTION AGREED AND I BELIEVED OK TO CLOSE AREA. UNFORTUNATELY AIRWORTHINESS DIRECTIVE #YX-WXXX, WHICH WAS PREVIOUSLY COMPLIED WITH, WAS NOT IN THE MAINT MANUAL OR TAPES BEING USED. ALSO THE TAB INSTALLATION KIT DID NOT REFLECT THE HARDWARE REQUIRED FOR THIS AIRWORTHINESS DIRECTIVE YX-WXXX TO BE ACCOMPLISHED. THEREFORE THE WRONG CASTELLATED NUT WAS INSTALLED. THIS DISCREPANCY WAS FOUND DURING ACCOMPLISHMENT OF A 'Q' CHK AND BROUGHT TO MY ATTN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE AIRWORTHINESS DIRECTIVE INSTALLS A SELF LOCKING CASTELLATED NUT ON THE TAB PUSH ROD. THE RPTR SAID THE PUSH ROD KIT FROM STOCK DID NOT HAVE THIS TYPE NUT BUT ONLY A CASTELLATED NUT AND THE MAINT MANUAL WAS IN ACCORD WITH THE KIT. THE RPTR STATED THIS PUSH ROD WAS INSTALLED. THE RPTR SAID LATER IN A 'Q' CHK, IT WAS DISCOVERED THE SELF LOCKING CASTELLATED NUT WAS NOT INSTALLED AND THE AIRWORTHINESS DIRECTIVE WAS FOUND UNDONE. THE RPTR STATED THAT ENGINEERING WAS ADVISED TO REVISE THE MAINT MANUAL, TAB AND PUSH ROD REPLACEMENT TO REFLECT THIS AIRWORTHINESS DIRECTIVE.

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.