MIL-T-21571A, MILITARY SPECIFICATION: TRACTOR, AIRCRAFT TOWING, GED, 4X4, 2-WHEEL STEER, 18,000 POUNDS DRAWBAR PULL, PNEUMATIC RUBBER TIRES, TYPE TA-18 (28-SEP-1962) [S/S BY NAVAIR DWG 1771AS100]

MIL-T-21571A, MILITARY SPECIFICATION: TRACTOR, AIRCRAFT TOWING, GED, 4X4, 2-WHEEL STEER, 18,000 POUNDS DRAWBAR PULL, PNEUMATIC RUBBER TIRES, TYPE TA-18 (28-SEP-1962) [S/S BY NAVAIR DWG 1771AS100]., This specification covers two types 4x4, front wheel pneumatic tired,GED tractors intended for use as an aircraft towing and spotting vehicle for large aircraft.