Commercial Fixed Wing
Maintenance Airframe; Maintenance Powerplant
Situational Awareness
Ground Event / Encounter FOD
Aircraft Aircraft Damaged
Airport; Environment - Non Weather Related
A fellow Mechanic and I were performing a high power engine run. Debris was thrown from the ramp behind the aircraft and struck another aircraft parked on the ramp. Ramp behind the runup area is falling apart and needs repair.
[A fellow Mechanic] and I performed engine runs on aircraft per the task card. All checks were good. Four days later I was asked by my supervisor who ran the aircraft. He notified me that damage occurred to another carrier's aircraft parked on their ramp. I told him we were on our designated run pad and performed the tasks required. I was unaware that debris from the aft area of the ramp; which is coming apart; was being blown into the aero flight aircraft. I do not know extent of damage to other aircraft. Clean up the unused areas of FOD from ramp space we do not use.
Two mechanics report that after high powered engine runs; debris from the poorly maintained ramp surface damaged another aircraft.