Narrative:

I worked overtime. Was assigned to 'C' check aircraft tail. I removed the left horizontal stabilizer to body board seal on the lower aft surface of the left horizontal stabilizer per the task card. Upon reinstallation of the blade seal; I believe I may have incorrectly positioned the metal blade seal behind the track assembly instead of in the track assembly. This would cause the metal blade seal assembly to rub against the fuselage and could cause wear. Contributing factors to this event could be: not having removed this blade seal and panel in recent memory; and not having worked a 'C' check in about 9 yrs. Maintenance control advised that he would have contract maintenance inspect affected stabilizer blade seal when aircraft overnighted tonight and take corrective action if necessary.

Related reports:

Google
 

Original NASA ASRS Text

Title: MECHANIC REPORTS HE MAY HAVE INCORRECTLY INSTALLED THE LEFT HORIZ STAB TO BODY; AFT BLADE SEAL; IN THE FUSELAGE TAIL SECTION OF A B737-300 ACFT.

Narrative: I WORKED OVERTIME. WAS ASSIGNED TO 'C' CHK ACFT TAIL. I REMOVED THE L HORIZ STABILIZER TO BODY BOARD SEAL ON THE LOWER AFT SURFACE OF THE L HORIZ STABILIZER PER THE TASK CARD. UPON REINSTALLATION OF THE BLADE SEAL; I BELIEVE I MAY HAVE INCORRECTLY POSITIONED THE METAL BLADE SEAL BEHIND THE TRACK ASSEMBLY INSTEAD OF IN THE TRACK ASSEMBLY. THIS WOULD CAUSE THE METAL BLADE SEAL ASSEMBLY TO RUB AGAINST THE FUSELAGE AND COULD CAUSE WEAR. CONTRIBUTING FACTORS TO THIS EVENT COULD BE: NOT HAVING REMOVED THIS BLADE SEAL AND PANEL IN RECENT MEMORY; AND NOT HAVING WORKED A 'C' CHK IN ABOUT 9 YRS. MAINT CTL ADVISED THAT HE WOULD HAVE CONTRACT MAINT INSPECT AFFECTED STABILIZER BLADE SEAL WHEN ACFT OVERNIGHTED TONIGHT AND TAKE CORRECTIVE ACTION IF NECESSARY.

Data retrieved from NASA's ASRS site as of May 2009 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.