HS 125 Series
Maintenance Powerplant; Maintenance Airframe
Situational Awareness; Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
General Maintenance Action
Procedure; Human Factors
April 2015; A Hawker arrived in ZZZ for a scheduled inspection. Two days later; early A.M.; a Technician was opening cockpit floor boards for the inspection. When he opened the co-pilots floorboard he discovered a large 12-18 inch [long] screw driver underneath the rudder pedals and linkage. I was notified four days later of the event. The Hawker Quality Assurance (Q/A) Manager has contacted the Air Carrier Q/A department and [was] instructed to send the screwdriver to ZZZ1. Not sure where the aircraft was prior to coming to ZZZ1 but we need to find out. This could have easily ended up as a catastrophic event with the loss of life. This should have been seen by whomever was giving the OK to close the panels.
A Maintenance Manager reports an Aircraft Maintenance Technician (AMT) discovered a large 12-18 inch screwdriver underneath the co-pilot's rudder pedals and linkage while opening up cockpit floorboards for inspection on a Hawker-Siddeley HS 125-900 aircraft.