|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||B737-300|
|Operating Under FAR Part||Part 121|
|Affiliation||company : air carrier|
|Function||maintenance : technician|
|Qualification||technician : airframe|
technician : powerplant
|Anomaly||aircraft equipment problem : critical|
maintenance problem : improper maintenance
non adherence : far
non adherence : published procedure
|Independent Detector||other other : 1|
|Resolutory Action||none taken : detected after the fact|
|Maintenance||performance deficiency : installation|
performance deficiency : scheduled maintenance
performance deficiency : non compliance with legal requirements
|Problem Areas||Maintenance Human Performance|
|Primary Problem||Maintenance Human Performance|
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.
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.