2-98. SERVICING OXYGEN SYSTEM.
breathing oxygen to the pilot, copilot, passengers, and
first aid position. Oxygen cylinder location is shown in
a. Oxygen System Safety Precautions.
Keep fire and heat away from oxygen
equipment. Do not smoke while working
with or near oxygen equipment, and take
care not to generate sparks with carelessly
handled tools when working on the oxygen
gauges, valves, fittings, masks, and all
other components of the oxygen system
free of oil, grease, gasoline, and all other
readily combustible substances. The
servicing, handling, and inspecting the
2. Do not allow foreign matter to enter
3. Never allow electrical equipment to come
into contact with the oxygen cylinder.
4. Never use oxygen from a cylinder without
first reducing its pressure through a
b. Replenishing Oxygen System.
1. Remove oxygen access door on outside of
2. Remove protective cap on oxygen system
3. Attach oxygen hose from oxygen servicing
unit to filler valve.
If the oxygen system pressure is below
200 psi, do not attempt to service system.
Make an entry on DA Form 2408-13-1.
4. Ensure that supply cylinder shutoff valves
on aircraft are open.
5. Slowly adjust valve position so that
pressure increases at a rate not to exceed
200 psig per minute.
6. Close pressure regulating valve on oxygen
servicing unit when pressure gauge on
Servicing Pressure Chart, Figure 2-44.
To compensate for loss of aircraft cylinder
pressure as the oxygen cools to ambient
temperature after recharging, the cylinder
pressure. Experience will determine what
compensate for the subsequent pressure
loss upon cooling. A complete recharge
will create substantial heating.
7. Adjust the final stabilized cylinder pressure
for ambient temperature per Figure 2-44.
8. Disconnect oxygen hose from oxygen
servicing unit and filler valve.
9. Install protective cap on oxygen filler
10. Install oxygen access door.
2-99. GROUND HANDLING.
information concerning movement and handling of the
aircraft while on the ground. The following paragraphs
give, in detail, the instructions and precautions
necessary to accomplish ground handling functions.
equipment are shown in Figure 2-45.
Accidents resulting in injury to personnel and damage
to equipment can be avoided or minimized by close
Carelessness or insufficient knowledge of the aircraft
or equipment being handled can be fatal. The
applicable technical manuals and pertinent directives
should be studied for familiarization with the aircraft, its
components, and the ground handling procedures
applicable to it, before attempting to accomplish