TM 55-1510-222-10
(2)
Do not allow foreign matter to enter
oxygen lines.
(3)
Never allow electrical equipment to
come in contact with the oxygen cylinder.
(4)
Never use oxygen from a cylinder
without first reducing its pressure through a-regulator.
b.
Replenishing Oxygen System.
(1)
Remove oxygen access door on
outside of aircraft (fig. 2-22).
(2)
Remove protective cap on oxygen
system filler valve.
(3)
Attach oxygen hose from oxygen
servicing unit to filler valve.
WARNING
If the oxygen system pressure is
below 200 PSI, do not attempt to
service system. Make an entry on DA
Form 2408-13.
(4)
Ensure that supply cylinder shutoff
valves on the aircraft are open.
(5)
Slowly adjust the 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 gage on oxygen
system indicates the pressure obtained using the
Oxygen System Servicing Pressure Chart (fig. 2-33).
NOTE
To compensate for loss of aircraft
cylinder pressure as the oxygen cools
to
ambient
temperature
after
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
subsequent
pressure
loss
upon
cooling. A complete recharge will
create substantial heating.
The final stabilized cylinder pressure should be adjusted
for ambient temperature per figure 2-33.
(7)
Disconnect oxygen hose from oxygen
servicing unit and filler valve.
(8)
Install protective cap on oxygen filler
valve.
(9)
Install oxygen access door.
2-102.
GROUND HANDLING.
Ground
handling
covers
all
the
essential
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.
Parking, covers, ground handling and towing equipment
are shown in figure 2-34.
a.
General
Ground
Handling
Procedure.
Accidents resulting in injury to personnel and damage to
equipment can be avoided or minimized by close
observance of existing safety standard and recognized
ground
handling
procedures.
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 ground handling.
b.
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
destroyed aircraft:
(1)
Keep intake air ducts free of loose
articles such as rags, tools, etc.
(2)
Stay clear of exhaust outlet areas.
(3)
During ground runup, ensure the
brakes are firmly set.
(4)
Keep area fore and aft of propellers
clear of maintenance equipment.
(5)
Do not operate engines with flight
control surfaces in the locked position.
(6)
Do not attempt towing or taxiing of the
aircraft with flight control surfaces in the locked position.
(7)
When high winds are present, do not
2-89
