TM 10-1670-305-23&P
AUTOMATIC RIPCORD RELEASE, MODEL 451
0008 00
OPERATION UNDER USUAL CONDITIONS - CONT
OPERATING PROCEDURES - CONT
WARNING
The altitude dial indicates thousands of feet above mean sea level (not above
ground level). If altitude dial is incorrectly set, two parachutes may deploy and
become entangled, which may result in death of parachutist.
5. Before jumping, verify that altitude dial is set at desired setting.
WARNING
Do not move the JUMP/OFF switch to jump unless the equivalent pressure
altitude inside the aircraft is at least 1,500 feet above the altitude set on the dial.
It is imperative that the AR2 remains well above its actuation altitude at all times
after the jump/off switch has been moved to jump. If there is a temporary
reduction in aircraft altitude, and the AR2 switch is not recycled back to jump
after again rising above the actuation altitude, the AR2 will actuate prematurely
during the jump, possibly causing deployment of two parachutes which may
become entangled, which may result in death of parachutist.
CAUTION
Move the JUMP/OFF switch between the two detent positions only. Do not force
the switch past either detent position. This may damage the internal mechanism
of the AR2 and cause a malfunction.
NOTE
If the dial setting must be changed in flight set the AR2 JUMP/OFF switch to OFF
and reset the dial. Do not set the JUMP/OFF switch back to JUMP until the
equivalent pressure altitude inside the aircraft is at least 1,500 feet above the
new altitude dial setting.
6. Move JUMP/OFF switch to JUMP. Verify that switch is all the way over to detent position.
Change 1
0008 00-6
