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A B737-300 incurred left inboard trailing edge flap and body fairing damage when the flaps were tested for an asymmetry cutoff report.
| Attributes | |
| ACN | 573918 |
| Time | |
| Date | 200302 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| ASRS Report | 573918 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 573917 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : flap position indicator other other : gnd 2-3-4 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : manuals performance deficiency : fault isolation performance deficiency : non compliance with legal requirements performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
On the morning of feb/mon/03 at approximately XA00, I was asked by a co-worker to assist him on aircraft with a flap asymmetry problem. We went out to the aircraft and tried to cycle the flaps from 40 degrees upwardly. Flaps would immediately split indications and stop. Reset asymmetry and kept flaps at 40 degrees. We returned to office to read maintenance manual and check history on aircraft. While I was in the office, 2 other mechanics went out to inspect the flaps. I was called out a short time later to return to the aircraft. At the aircraft I was directed over to the left wing and should the damage that had occurred due to the left inboard aft flap assembly shifting into and damaging the aft wing to body fairing and associated parts. I returned to the office to notify the appropriate persons. Supplemental information from acn 573920: went to back of aircraft and noticed l-hand flap way out of rig and pulled into the fillet panels. I then reported to my superiors.
Original NASA ASRS Text
Title: A B737-300 INCURRED L INBOARD TRAILING EDGE FLAP AND BODY FAIRING DAMAGE WHEN THE FLAPS WERE TESTED FOR AN ASYMMETRY CUTOFF RPT.
Narrative: ON THE MORNING OF FEB/MON/03 AT APPROX XA00, I WAS ASKED BY A CO-WORKER TO ASSIST HIM ON ACFT WITH A FLAP ASYMMETRY PROB. WE WENT OUT TO THE ACFT AND TRIED TO CYCLE THE FLAPS FROM 40 DEGS UPWARDLY. FLAPS WOULD IMMEDIATELY SPLIT INDICATIONS AND STOP. RESET ASYMMETRY AND KEPT FLAPS AT 40 DEGS. WE RETURNED TO OFFICE TO READ MAINT MANUAL AND CHK HISTORY ON ACFT. WHILE I WAS IN THE OFFICE, 2 OTHER MECHS WENT OUT TO INSPECT THE FLAPS. I WAS CALLED OUT A SHORT TIME LATER TO RETURN TO THE ACFT. AT THE ACFT I WAS DIRECTED OVER TO THE L WING AND SHOULD THE DAMAGE THAT HAD OCCURRED DUE TO THE L INBOARD AFT FLAP ASSEMBLY SHIFTING INTO AND DAMAGING THE AFT WING TO BODY FAIRING AND ASSOCIATED PARTS. I RETURNED TO THE OFFICE TO NOTIFY THE APPROPRIATE PERSONS. SUPPLEMENTAL INFO FROM ACN 573920: WENT TO BACK OF ACFT AND NOTICED L-HAND FLAP WAY OUT OF RIG AND PULLED INTO THE FILLET PANELS. I THEN RPTED TO MY SUPERIORS.
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.