Post flight analysis revealed a failed component in the OBOGS
system was allowing contaminated air into the system.
The Litton OBOGS
system for C-130 aircraft is based on the mature, off-the-shelf F-15 Eagle oxygen concentrator with minor modifications.
is an onboard oxygen concentrator that supplies aircrew oxygen for breathing.
The delivered aircraft is the first operational F-16 to incorporate OBOGS
We quickly realized this was not a random caution but a bona fide, full blown, no kidding, OBOGS
and BRAG valve are designed by Normalair Garrett, Ltd.
Then I saw three cautions on my left DDI: L BLEED OFF, R BLEED OFF and OBOGS
Other programmes which might eventually opt for OBOGS
include the AMX and the Indian Light Combat Aircraft.
As a last resort, you could shut off your engine bleeds, but you must keep in mind the critical systems you will lose (such as OBOGS
, cabin pressurization, anti-G and external fuel transfer).
I also dropped my mask and did not get back on the OBOGS
because that could have been the source of my troubles.
The Naval Safety Center released a message in August 2005 when it became apparent that contamination from OBOGS
units might be seen as a cause of hypoxia incidents.
I tried to determine if the problem was bad ambient air (cabin altitude matching actual altitude of 6,000 feet) or the air coming out of the OBOGS
system, which felt stale and had weak flow.