Downloaded from https://www.everyspec.com MIL-STD-810D 19 July 1983 TABLE 500.2-I. Minimum.carRo co Dar ent Dressu m tm re~. Aircraft Minimum Cargo Compartment Pressure Equivalent Altitude (reference c). (psia) (kPa) (ft) (m) G130 8.29 57.2 15,000 4,570 C-141 8.63 , 59.5 ., 8.8; . 60.7 ~ 14,000 4,270 .,, C-5A .13,500 4,110 DC-8/707/DC-9-80 8.29 57.2 ,.. ., 15,000 4,570 DGlo/-r47/Kc-lo 8.29 57.2 ,. 15,000 u,570 L-1011I767 8.29 57.2 ., 15,000 4,570 c-160 Transall 8.63 59.5 ‘14,000 4,270 L A-300/C 10.71 73.8 .8,000 2,400 (3) Maximum fl.i.gbtal ltude for” ~. exDlosive decomnression testing:.“12,200m (40,000 ft) (18.84 IcPa).
When it is known that other altitudes will be encountered, teat the equipment for the known elevation. b. ~e rate. If a epecific rate of altitude change (climb/descent rate) is not known or speoified in the requirements document, the following guidance is offered: In general, and with the exception of the explosive decompression test, the rate of altitude change should not exceed 10 m/s (2,000 ft/min) unless justified by the anticipated deployment plstform, In a full military power takeoff, military transport aircraft normally have an average altitude change rate of 7.6 m/a (1,500 ft/min).
To conserve fuel, the present”procedure is to have a 3.8 to 4.1 m/s (750 to 800 ft/min) altitude change rate, normal practice for commercial aircraft operations. The value of 10 m/s will also be used for ground deployment teata (for standardization purpoeee) unless otherwise specified. c. -id deco mcx-essionrate. Thene are several conditions for which the rapid rate .of decompression may vary. These include: (1) Massive damage to the aircraft, but the aircraft survives and decompression is virtually instantaneous. (2) Relatively small holes caused by foreign objects through which decompression could occur at a slower rate than in (1) above.
(3) Relatively gradual loss of pressure due to loosening of aircraft structure. I The decompression in procedure III should be accomplished as quickly as possible but shall not take more than 15 seconds. MRTHOD 500:2 19 JUIY 1983 500.2-4