TM 1-1680-361-10
0004 00-6
DESCRIPTION AND USE OF OPERATOR CONTROLS AND
INDICATORS WORK PACKAGE - Continued
0004 00
SRU-36/P HEED
ON/OFF Valve
WARNING
When regulator ON/OFF valve is on and HEED is
under pressure, ensure pressure indicator pin is directed
away from face and exposed body parts. Should internal
structural failure of pressure indicator pin occur, ejected
fragments of pin could cause serious personal injury.
The HEED is activated by turning the ON/OFF valve (1) fully
counterclockwise to the ON position. For flight operations, the
ON/OFF valve shall be turned on when preflight inspection is
performed and shall remain on until postflight inspection is
performed.
PURGE BUTTON (2)
ON/OFF VALVE (1)
