Airplane Finish Care; Oxygen System; Servicing Oxygen System; Oxygen System Safety Precautions - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
e.
To install a new sanitary bag, place it over the top edge of the pail and push it into the bottom of
the pail.
2-73. AIRPLANE FINISH CARE. The complete airplane is carefully finished inside and outside to assure
maximum service life. Both sides of all parts are alidine treated and sprayed with zinc chromate primer. The
external surfaces are coated with durable acrylic lacquer.
When washing the airplane it is advisable to use a mild soap and water solution. Loose dirt should be
flushed away with clean water. Harsh abrasive or alkaline soaps or detergents could cause corrosion or make
scratches in the finish.
Use naphtha and a soft cloth to remove stubborn oil and grease. Any good automotive wax can be
used to preserve the painted surfaces. Soft cleaning cloth or chamois should be used to prevent scratches
when cleaning or polishing. Apply a heavier coating of wax on the leading edges of the wings and tail
surfaces and on the nose cone section and propeller spinners to reduce the abrasion problems in these areas.
On aircraft equipped with pneumatic deicers, refer to Section XIV Paragraph 14-85 for application of
ICEX material. This is a special compound which will not harm the rubber surface of the deicer boots.
When repainting the airplane, never use aluminum foil as a paint spray mask on Aircon Nesa coated
windshields. Nesa film is used on the exterior for static electricity protection and is basically tin oxide.
Most metal brightners, whether alkaline or acidic, can react with the aluminum foil and release hydrogen,
which may come in contact with the tin oxide. When the hydrogen and the tin oxide combine, the tin
oxide film is reduced to pure tin and when wiped away will leave a permanent dark stain. If metal
brightners are to be used, insure adequate protection for the windshield by using paper and pasteboard
prior to painting.
2-74. OXYGEN SYSTEM.
2-75. SERVICING OXYGEN SYSTEM. Theoxygenforthebreathingsystemisfurnished from a stationary
cylinder located in the side of the nose section, directly behind the baggage compartment or on the upper right
side of the fuselage aft of the rear baggage compartment. At 1850 psi of pressure the oxygen cylinder has a
capacity of 48 cubic feet. Service and maintenance instructions for the oxygen system may be found in Section
XIV.
2-76. OXYGEN SYSTEM SAFETY PRECAUTIONS. The utmost care must be exercised in servicing,
handling and inspection of the oxygen system. Comply with the following precautions:
a.
Keep the oxygen regulator, cylinder, gauge, valve, fittings, masks and all other components of the
oxygen system free of oil, grease, gasoline and all other readily combustible substances.
b.
Do not allow foreign matter to enter the oxygen lines.
WARNING
The presence of foreign matter in the high pressure lines can cause
an explosion. When coming in contact with oxygen equipment
keep hands, tools and clothing clean - hospital clean.
c.
Never attempt to repair or repaint oxygen equipment.
d. 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 system.
e.
Never allow electrical equipment to come in contact with the oxygen cylinder.
f.
Use only Ribbon Dope Thread Sealant (Permacel 412) on oxygen system. Apply only to the first
three threads of male fittings to prevent thread seizure.
Reissued: 9/23/80
HANDLING AND SERVICING
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