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Mechanic working a maintenance card on a B737-700 aircraft realizes the following day he failed to remove the plugs on the elevator feel computer drain lines in the horizontal stabilizer compartment.
| Attributes | |
| ACN | 778165 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 778165 |
| Events | |
| Anomaly | maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | other |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
I was tasked with accomplishing task card #XXXX. I entered the aft unpressurized compartment and placed plugs on the elevator feel computer drain lines. The inboard plug had a 'maintenance in progress' streamer attached to it. I forgot to remove this streamer and attach it to the access door. I proceeded with the leak check. The aircraft passed the leak check. I put away the man lift and pitot static test set. I totally forgot about the drains being plugged. I did not close the aft compartment access door because other mechanics would have to enter to lube the stabilizer jack screw; etc. The aircraft was repositioned to the ramp area near the terminal. I realized I'd left the plugs on when I was getting ready for work in the evening the next day. When I got to work; I notified my supervisor. He notified maintenance control of my mistake.
Original NASA ASRS Text
Title: MECHANIC WORKING A MAINT CARD ON A B737-700 ACFT REALIZES THE FOLLOWING DAY HE FAILED TO REMOVE THE PLUGS ON THE ELEVATOR FEEL COMPUTER DRAIN LINES IN THE HORIZ STABILIZER COMPARTMENT.
Narrative: I WAS TASKED WITH ACCOMPLISHING TASK CARD #XXXX. I ENTERED THE AFT UNPRESSURIZED COMPARTMENT AND PLACED PLUGS ON THE ELEVATOR FEEL COMPUTER DRAIN LINES. THE INBOARD PLUG HAD A 'MAINT IN PROGRESS' STREAMER ATTACHED TO IT. I FORGOT TO REMOVE THIS STREAMER AND ATTACH IT TO THE ACCESS DOOR. I PROCEEDED WITH THE LEAK CHK. THE ACFT PASSED THE LEAK CHK. I PUT AWAY THE MAN LIFT AND PITOT STATIC TEST SET. I TOTALLY FORGOT ABOUT THE DRAINS BEING PLUGGED. I DID NOT CLOSE THE AFT COMPARTMENT ACCESS DOOR BECAUSE OTHER MECHS WOULD HAVE TO ENTER TO LUBE THE STABILIZER JACK SCREW; ETC. THE ACFT WAS REPOSITIONED TO THE RAMP AREA NEAR THE TERMINAL. I REALIZED I'D LEFT THE PLUGS ON WHEN I WAS GETTING READY FOR WORK IN THE EVENING THE NEXT DAY. WHEN I GOT TO WORK; I NOTIFIED MY SUPVR. HE NOTIFIED MAINT CTL OF MY MISTAKE.
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.