 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
While accomplishing an engineering directive modification on a rudder PCU actuator of a B747-400; and working from an extended boom platform of a jlg manlift; mechanic drops a tool causing two each punctures in the right hand elevator upper surface.
| Attributes | |
| ACN | 818322 |
| Time | |
| Date | 200901 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Rudder Control System |
| Person 1 | |
| Function | Technician |
| Events | |
| Anomaly | Deviation - Procedural Maintenance |
Narrative:
While performing work above control surface to accomplish engineering directive; tool was accidentally dropped from jlg lift; which contacted right-hand inboard elevator; upper surface; causing 2 each punctures. Mechanic was 9 hours into his shift; and working from the boom of an extended jlg lift. Callback conversation with reporter revealed the following information: reporter stated the engineering modification requires a plug installation; torque check verification and safety wiring on the rudder actuator power control unit (PCU). Reporter stated when he dropped his safety wire pliers from up on the vertical stabilizer; he noticed the pliers hitting the external fuselage aluminum skin in the APU area and ricocheting 90 degrees laterally; with both handles sticking into the right-hand elevator upper composite surface.
Original NASA ASRS Text
Title: While accomplishing an Engineering Directive modification on a rudder PCU actuator of a B747-400; and working from an extended boom platform of a JLG manlift; Mechanic drops a tool causing two each punctures in the right hand elevator upper surface.
Narrative: While performing work above control surface to accomplish Engineering Directive; tool was accidentally dropped from JLG lift; which contacted right-hand inboard elevator; upper surface; causing 2 each punctures. Mechanic was 9 hours into his shift; and working from the boom of an extended JLG lift. Callback conversation with Reporter revealed the following information: Reporter stated the engineering modification requires a plug installation; torque check verification and safety wiring on the rudder actuator Power Control Unit (PCU). Reporter stated when he dropped his safety wire pliers from up on the vertical stabilizer; he noticed the pliers hitting the external fuselage aluminum skin in the APU area and ricocheting 90 degrees laterally; with both handles sticking into the right-hand elevator upper composite surface.
Data retrieved from NASA's ASRS site as of April 2012 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.