Incident Description
A scheduled passenger flight was dispatched with takeoff performance data calculated for 15 degrees of flap and assuming departure from runway 10/28, which has a length of 9,228 feet. The actual takeoff occurred from runway 19, which is 7,000 feet long. During the takeoff roll, the airplane lifted from the surface while still over the safety area at the departure end of the runway. As the aircraft became airborne, the left main landing gear struck a lighting control box for the rail system. The impact caused a portion of the landing gear scupper to separate from the airplane. Despite the damage, the flight continued to its intended destination and executed a landing without further incident.
Pre-Departure Context
Prior to departure, the flight engineer completed his portion of the takeoff data sheet and provided it to the captain. The captain anticipated that runway 10 would be the departure runway and performed the takeoff data calculations using runway 10 data. However, the ATIS information and the taxi clearance both specified that takeoff was to be conducted on runway 19. The operator's procedures did not assign the responsibility for takeoff data calculations to a specific crew member, nor did they require verification of such information by any other crew member.