Narrative:

I was assigned to work aircraft X non-routine work card. I was assigned the task of assisting 3 other technicians to remove and replace a leased right outboard aft flap. When I arrived on the job; 2 of the technicians were already on the job and the aft flap was already removed. The 2 technicians with the help of a third technician installed and adjusted the replacement aft flap. One of the technicians assigned to the task originally; short signed for the installation of the flap and left the job. In order to remove and install the aft flap; the flap support aft fairings must be disconnected. This was done before I was on the job. The 2 remaining technicians and myself; connected the aft portion of the flap support fairings. The forward connection of the aft support fairings; appeared to be undisturbed. The fairing was suspended from the forward connection with the access covers to the connection open. The forward connection covers were closed by the 2 other technicians. To complete the task; the flaps were operated while an inspector checked the installation and adjustment of the aft flap. I signed for operations check 'ok' and signed the card as completed. The inspector signed the card as completed also. After turning the work card in I realized someone could have loosened the forward attach point of the flap support fairings and the attach points may have needed to be torque checked. At the time I realized the potential problem; it was shift change. I found the oncoming inspector for the aircraft and asked him to write a non-routine work card to have the forward attach points of the flap support fairings torque checked. He said he would do so. I am filing this report because the attach points could be loose and to ensure the attachments are checked. Callback conversation with reporter revealed the following information: reporter stated he wanted the fwd attach points of the aft fairing to be torque checked because he did not believe any one of the mechanics working earlier; or the three with him; had torqued checked the fwd attach points of the aft fairing. Reporter also stated the outboard aft flap; aft support fairings are easier to install on the -800's; than the older 737-300's and-500's.

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Original NASA ASRS Text

Title: A B737-800 ACFT MECHANIC REALIZED AFTER TURNING IN HIS JOB CARD; THAT ANOTHER MECHANIC COULD HAVE LOOSENED THE FWD ATTACH POINTS OF THE R OUTBOARD AFT FLAP; AFT SUPPORT FAIRINGS.

Narrative: I WAS ASSIGNED TO WORK ACFT X NON-ROUTINE WORK CARD. I WAS ASSIGNED THE TASK OF ASSISTING 3 OTHER TECHNICIANS TO REMOVE AND REPLACE A LEASED R OUTBOARD AFT FLAP. WHEN I ARRIVED ON THE JOB; 2 OF THE TECHNICIANS WERE ALREADY ON THE JOB AND THE AFT FLAP WAS ALREADY REMOVED. THE 2 TECHNICIANS WITH THE HELP OF A THIRD TECHNICIAN INSTALLED AND ADJUSTED THE REPLACEMENT AFT FLAP. ONE OF THE TECHNICIANS ASSIGNED TO THE TASK ORIGINALLY; SHORT SIGNED FOR THE INSTALLATION OF THE FLAP AND LEFT THE JOB. IN ORDER TO REMOVE AND INSTALL THE AFT FLAP; THE FLAP SUPPORT AFT FAIRINGS MUST BE DISCONNECTED. THIS WAS DONE BEFORE I WAS ON THE JOB. THE 2 REMAINING TECHNICIANS AND MYSELF; CONNECTED THE AFT PORTION OF THE FLAP SUPPORT FAIRINGS. THE FORWARD CONNECTION OF THE AFT SUPPORT FAIRINGS; APPEARED TO BE UNDISTURBED. THE FAIRING WAS SUSPENDED FROM THE FORWARD CONNECTION WITH THE ACCESS COVERS TO THE CONNECTION OPEN. THE FORWARD CONNECTION COVERS WERE CLOSED BY THE 2 OTHER TECHNICIANS. TO COMPLETE THE TASK; THE FLAPS WERE OPERATED WHILE AN INSPECTOR CHKED THE INSTALLATION AND ADJUSTMENT OF THE AFT FLAP. I SIGNED FOR OPS CHK 'OK' AND SIGNED THE CARD AS COMPLETED. THE INSPECTOR SIGNED THE CARD AS COMPLETED ALSO. AFTER TURNING THE WORK CARD IN I REALIZED SOMEONE COULD HAVE LOOSENED THE FORWARD ATTACH POINT OF THE FLAP SUPPORT FAIRINGS AND THE ATTACH POINTS MAY HAVE NEEDED TO BE TORQUE CHKED. AT THE TIME I REALIZED THE POTENTIAL PROB; IT WAS SHIFT CHANGE. I FOUND THE ONCOMING INSPECTOR FOR THE ACFT AND ASKED HIM TO WRITE A NON-ROUTINE WORK CARD TO HAVE THE FORWARD ATTACH POINTS OF THE FLAP SUPPORT FAIRINGS TORQUE CHKED. HE SAID HE WOULD DO SO. I AM FILING THIS RPT BECAUSE THE ATTACH POINTS COULD BE LOOSE AND TO ENSURE THE ATTACHMENTS ARE CHKED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED HE WANTED THE FWD ATTACH POINTS OF THE AFT FAIRING TO BE TORQUE CHECKED BECAUSE HE DID NOT BELIEVE ANY ONE OF THE MECHANICS WORKING EARLIER; OR THE THREE WITH HIM; HAD TORQUED CHECKED THE FWD ATTACH POINTS OF THE AFT FAIRING. REPORTER ALSO STATED THE OUTBOARD AFT FLAP; AFT SUPPORT FAIRINGS ARE EASIER TO INSTALL ON THE -800'S; THAN THE OLDER 737-300'S AND-500'S.

Data retrieved from NASA's ASRS site as of January 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.