five firings. After each test, the hose should be
component deformation. Any sign of deformation will
require modification of the device and a new
blown clean of residue with dry, compressed air.
Hose connections should be reversed after each
firing so that one end of the hose is not con-
m. Performance Evaluation.
nected to the device for two consecutive firings.
(2) Twenty firings are conducted at each tem-
(1) Performance evaluation is conducted to insure
perature:-6570 and 200F. In each series of
that the propellant actuated device meets the
firings, 5 of the 20 firings should be conducted in
design requirements at each temperature
previously unfired units.
specified. The units are fired under conditions
(3) Any firings failing to meet the design
simulating those of service operation as closely
requirements are analyzed and, if redesign is
as possible, and using hose lengths (if required)
necessary, a new complete evaluation program is
specified in the design requirements. An aircraft
initiated with the modified design.
hose assembly should not be temperature
conditioned, nor should it be used for more than