A Mechanic reports she did not follow the paperwork properly regarding the rigging of speed brake control rod actuators and safetying of their rod ends on five B767's. The control rods were installed as part of the winglet installation to protect the flight spoilers from an overspeed condition.
Synopsis
A Mechanic reports she did not follow the paperwork properly regarding the rigging of speed brake control rod actuators and safetying of their rod ends on five B767's. The control rods were installed as part of the winglet installation to protect the flight spoilers from an overspeed condition.
Narrative
I did not rig the actuators and did not safety the rod end on four of our B767s. The next aircraft I work will be rigged and safetied correctly. Did not follow the paperwork properly regarding rigging the actuator because of hurry up attitude and assumed it was similar to the 757 winglet auto stow. When I experienced a problem because of different steps that needed to be taken that are different than the paperwork; I saw that I had missed a safety on the actuator and that led me to go back and investigate what I had done. I saw that I had not left the rig pin in the auto stow assembly like the paperwork said; which in turn would have led me to adjust the actuator and I would have then saw the safety on the rod end that would have needed adjustment. I missed this step on the previous aircraft I had worked the auto stow on. Slow down. Read slower and more completely. Being complacent because of prior experience on 757 aircraft auto stow caused me to assume factors. Not checking paperwork properly and hurrying myself to produce to keep the base open.
NASA callback
Reporter stated that winglets had been installed on some of their B767's that also required a control rod actuator be installed from the speed brake handle to the spoiler/speed brake auto-stow mechanism which is under and aft of the cockpit center pedestal.Reporter stated that although the winglets calm the air flow further out on the wing itself; they also make it possible to overspeed the flight spoilers. So the control rod actuator had to be installed and rigged and safetied. The stowing of the flight spoilers is done electrically. Her complacency and assumptions came from working on B757's that already had the control rod actuator incorporated in the speed brake system and did not need any rigging; so she assumed the B767's were the same. The controller for the unit is in the Mid-E/E compartment.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.