Low-altitude parachute-extraction system

The low-altitude parachute-extraction system (LAPES) / Low-level parachute extraction resupply system (LOLEX)[1] is a tactical military airlift delivery method where a fixed-wing cargo aircraft can deposit supplies in situations in which landing is not an option, in an area that is too small to accurately parachute supplies from a high altitude.

Preparation for a LAPES delivery includes loading cargo on a pallet rigged with two types of parachutes (chutes).

The LAPES delivery procedure begins by slowing to approach speed, lowering the ramp, and opening the cargo door.

The pilot adjusts the flight controls to remain level during the extreme change in the aircraft center of gravity caused by the pallet movement.

However, the drop sequence's low altitude allows for no margin of pilot error and the risk of plane crash is heightened.

[3] On July 1, 1987, during a capabilities exercise (CAPEX), a USAF C-130E (68-10945 c/n 4325) crashed while performing a LAPES demo at the Sicily Drop Zone, on Fort Bragg.