When aircraft is being serviced with oxygen
within 50 feet of an area where smoking is permitted, NO
SMOKING signs shall be placed at a 50-foot radius
around the servicing area.
All aircraft parked outside will be grounded
and bonded, in accordance with FM 1-500, to the
aerospace ground equipment while servicing oxygen
Oxygen equipment shall be kept clean
at all times. No organic matter or
flammable substance of any nature
shall be allowed to contact oxygen.
Ensure that all components of the
systems are free of moisture, oil, and
grease at all times. Oxygen is a
supports combustion and lowers the
combustible materials. Oxygen shall
be handled as a flammable gas.
To prevent overfilling of tanks, personnel
shall observe aircraft oxygen system gauges at all times
during servicing operation.
Personnel shall be stationed at the oxygen
servicing unit at all times during servicing operation to
shut off unit valves immediately upon receiving a
command from personnel watching aircraft system gauge.
Service aircraft from cylinders clearly
labeled DRY or AVIATOR'S BREATHING OXYGEN.
Other Oxygen may have moisture which could cause flow
stoppage at temperatures below freezing.
Always use a pressure-reducing device
when servicing low-pressure oxygen system from high
Fill oxygen system slowly to prevent
explosion resulting from heat generated by filling too fast.
An aircraft oxygen system not equipped
with shutoff devices at cylinders shall be completely
discharged of all pressure prior to removing components.
All electrical power shall be shut off during oxygen
Refer to applicable aircraft maintenance
manual for additional information and maintenance
9-18. Relief Tube System. Maintenance of relief tubes
primarily consists of cleaning and replacing of parts.
Clean or replace parts using the following procedures:
To clean and deodorize relief tube systems, a
solution of 1 1/2 ounces of MIL-SPEC A-A-1634 general
purpose deodorant and 5 gallons of water will be used to
wash area around relief tube exit and relief tube entrance.
Pour remainder of solution through the tube.
When an offensive odor remains, use a stronger solution
and reclean until odor is removed.
The area of relief tube exhaust will be
primed with zinc chromate primer,
Federal Specification TT-P-1757, and
Federal Specification TT-L-54
Replace deteriorated hose, broken or damaged
horn, and broken or damaged attaching parts.
Install hose so as to eliminate any
9-19. Windshield Wiper System. Maintenance and
adjustment of the windshield wiper system is explained in
the following paragraphs.
Maintenance of Windshield Wiper System. The
maintenance of the windshield wiper system consists
primarily of replacement of defective parts, as follows.
Replace wiper motor, wiper units, wiper
arms, and flexible cables that are inoperative, cracked,
bent or otherwise defective.
Replace wiper blades that are worn,
deteriorated, or torn, or when rubber has lost its elastic