15. Ensure that bleed valve V-2 is opened and
all other test stand valves are closed.
16. Measure the force required to disengage
the automatic oxygen release with a scale. This
force should be 10 to 30 pounds when it dis-
engages; the emergency oxygen system should
actuate and indicate 45 to 80 psi on gauge
17. Reset the reducer.
18. Open valve V-5 to bleed pressure.
19. When pressure is bled, as indicated by no
indication on gauges PG-1 and PG-4, close valve
V-5. Now, observe gauge PG-4 for 2 minutes. Any
pressure rise indicates leakage in the valve seat of
20. Open valve V-5 and close valve V-2.
21. Disconnect the oxygen hose from fitting
22. Ensure all valves on the test stand are
23. Connect the oxygen outlet hose to fitting
NIP-6. Ensure that valve V-10 is open and all
other test stand valves are closed.
24. Connect the test stand hose between
fitting NIP-5 and fitting NIP-4.
25. Move valve V-1 to the NIP-4 position.
26. Ensure that 1,800 to 2,000 psi is in the
oxygen cylinder of the kit.
27. Pull the manual oxygen release. Slowly
open valve V-9 to indicate 90 liters per minute on
gauge PG-2. Oxygen pressure should be indicated
as 45 to 80 psi on gauge PG-1.
28. Observe emergency oxygen cylinder
pressure gauge and allow the system to decrease
to 250 psi while maintaining 90 LPM and 45 to
80 psi pressure. When needle of this cylinder
pressure gauge is between the E and F of REFILL,
pressure is approximately 250 psi.
29. Close valve V-9.
30. With zero flow indicated on gauge PG-2,
gauge PG-1 should indicate 45 to 80 psi.
31. Reinstall the manual oxygen release (if
separating type) and reset the reducer.
32. Bleed the oxygen pressure from the system
by opening valves V-5 and V-2. All pressure is bled
when gauges PG-1 and PG-4 indicate zero
33. Disconnect the kit from the test stand.
34. Secure the test stand.
35. Thoroughly clean all areas wetted with
leak test solution with clean water. Dry them with
a lint-free cloth, filtered low-pressure compressed
air, or by low-pressure nitrogen.
36. Recharge the emergency oxygen cylinder
to 1,800 to 2,000 psi.
37. Perform a release handle pull test on the
fully packed kit. (Refer to NAVAIR 13-1-6.3 for
PURGING AND CHARGING
EMERGENCY OXYGEN SYSTEMS
To purge and charge the emergency oxygen
cylinder, proceed as follows:
Leak detection compound
Oxygen purging electric heater
Nitrogen, type I, class I, grade A
Aviators breathing oxygen, type I
1. If the survival kit assembly has not been
removed from the aircraft, remove the personnel
parachute and survival kit in accordance with the
applicable maintenance manual.
2. Remove the oxygen filler valve cap and
connect a filling adapter to the filler valve
(fig. 7-9). If the emergency oxygen system is
Figure 7-9.Filling adapter.