Do not allow foreign matter to enter
Never allow electrical equipment to
come in contact with the oxygen cylinder.
Never use oxygen from a cylinder
without first reducing its pressure through a-regulator.
Replenishing Oxygen System.
Remove oxygen access door on
outside of aircraft (fig. 2-22).
Remove protective cap on oxygen
system filler valve.
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
Ensure that supply cylinder shutoff
valves on the aircraft are open.
Slowly adjust the valve position so
that pressure increases at a rate not to exceed 200
PSIG per minute.
Close pressure regulating valve on
oxygen servicing unit when pressure gage on oxygen
system indicates the pressure obtained using the
Oxygen System Servicing Pressure Chart (fig. 2-33).
To compensate for loss of aircraft
cylinder pressure as the oxygen cools
recharging, the cylinder should be
charged initially to approximately 10%
over prescribed pressure. Experience
will determine what initial pressure
should be used to compensate for the
cooling. A complete recharge will
create substantial heating.
The final stabilized cylinder pressure should be adjusted
for ambient temperature per figure 2-33.
Disconnect oxygen hose from oxygen
servicing unit and filler valve.
Install protective cap on oxygen filler
Install oxygen access door.
information concerning movement and handling of the
aircraft while on the ground. The following paragraphs
necessary to accomplish ground handling functions.
Parking, covers, ground handling and towing equipment
are shown in figure 2-34.
Accidents resulting in injury to personnel and damage to
equipment can be avoided or minimized by close
observance of existing safety standard and recognized
insufficient knowledge of the aircraft or equipment being
handled can be fatal. The applicable technical manuals
familiarization with the aircraft, its components, and the
ground handling procedures applicable to it, before
attempting to accomplish ground handling.
Ground Handling Safety Practices. Aircraft
equipped with turboprop engines require additional
maintenance safety practices. The following list of
safety practices should be observed at all times to
prevent possible injury to personnel and/or damaged or
Keep intake air ducts free of loose
articles such as rags, tools, etc.
Stay clear of exhaust outlet areas.
During ground runup, ensure the
brakes are firmly set.
Keep area fore and aft of propellers
clear of maintenance equipment.
Do not operate engines with flight
control surfaces in the locked position.
Do not attempt towing or taxiing of the
aircraft with flight control surfaces in the locked position.
When high winds are present, do not