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B737 maintenance technicians reported the flaps were lowered onto a ladder that was positioned under the trailing edge of the flaps.
| Attributes | |
| ACN | 1557823 |
| Time | |
| Date | 201807 |
| Local Time Of Day | 1801-2400 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | None |
| Component | |
| Aircraft Component | Trailing Edge Flap |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy Ground Event / Encounter Object |
Narrative:
I was working pax window inspection on aircraft. The cabin check had the APU on along with the packs for cooling the cabin. I had my ear plugs because I was working the pax window inspection card outside. I was inspecting the windows on the left side of aircraft fwd of the eng. A mechanic called down and asked if the wings were clear for flaps; I looked at both wings and gave him the clear sign. Several minutes went by I completed the window inspection fwd of the wing so I moved the ladder and tool box to the aft side on wing. I positioned my ladder to continue with the inspection. I climbed the ladder and started with the inspection again. With ear plugs in APU running and packs on I didn't hear him call out or see him for movement of the flaps and I couldn't see the beacon on because I was up against the fuselage. Once I saw the flaps moving down I jumped off the ladder but could not move out of the way before the flaps contacted the ladder. A person needs to keep in eyesight with all flaps moving; and be in contact with the person who is moving flaps and to the position that they are moving to.
Original NASA ASRS Text
Title: B737 Maintenance Technicians reported the flaps were lowered onto a ladder that was positioned under the trailing edge of the flaps.
Narrative: I was working pax window inspection on aircraft. The cabin check had the APU on along with the packs for cooling the cabin. I had my ear plugs because I was working the pax window inspection card outside. I was inspecting the windows on the left side of aircraft fwd of the eng. A mechanic called down and asked if the wings were clear for flaps; I looked at both wings and gave him the clear sign. Several minutes went by I completed the window inspection fwd of the wing so I moved the ladder and tool box to the aft side on wing. I positioned my ladder to continue with the inspection. I climbed the ladder and started with the inspection again. With ear plugs in APU running and packs on I didn't hear him call out or see him for movement of the flaps and I couldn't see the beacon on because I was up against the fuselage. Once I saw the flaps moving down I jumped off the ladder but could not move out of the way before the flaps contacted the ladder. A person needs to keep in eyesight with all flaps moving; and be in contact with the person who is moving flaps and to the position that they are moving to.
Data retrieved from NASA's ASRS site 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.