Cleaning And Purging Oxygen System Components; Application Of Teflon Tape Thread Sealant - Piper Malibu Meridian PA-46-500TP Airplane Maintenance Manual

(2) Cleaning and Purging Oxygen System Components

CAUTION: CARE MUST BE EXERCISED TO PREVENT CONTAMINATION OF
Three methods are recommended for cleaning oxygen system components:
(a) Method I.
1
2
(b) Method II.
1
2
3
4
5
(c) Method III.
1
2
3
CAUTION: DO NOT USE ADHESIVE TAPE FOR ATTACHING OR SECURING
(d) After cleaning, all tubing must be protected by caps, plugs and/or plastic bags.
(e) Before installation, make sure fitting, tube, and fixture threads are in good condition and
that the cones do not exhibit pitting or disfigurement.

(3) Application of Teflon Tape Thread Sealant

All male pipe (tapered) threads of the oxygen system should be sealed with 3M No. 48 teflon
tape. Teflon tape should not be used on straight threads. Do not use any other lubricants in
place of the teflon or on any other threads.
(a) Wrap tape on the threads, starting with those farthest from the opening, in the direction of
the thread spiral. Circle the threads, making sure that each side of the tape has a slight
overlap.
(b) Wrap the tape such that it does not extend beyond the last thread on the fitting at the
opening. The tape should then be pulled till it separates. Do not cut tape, it will not stick
properly.
6C15
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
COMPONENTS BY OIL, GREASE, WATER, OR FOREIGN MATTER.
COMPRESSED AIR USED IN CLEANING AND FLUSHING TUBES AND
HOSES MUST BE CLEAN, DRY, FILTERED (OIL FREE) AIR ONLY.
Vapor degrease part(s) with trichlorethylene.
Blow part(s) dry with a stream of compressed air or dry nitrogen.
For tubing, flush with naptha per specification TT-N-95.
Blow clean and dry off all solvent with clean, dry, filtered air.
Flush with isopropyl alcohol.
Rinse thoroughly with fresh water.
Dry with air as described in previous caution or by heating at a temperature of 250°
to 300°F for one-half hour.
NOTE: Solvents can be reused provided they do not become badly contaminated
with oil. This condition can be determined by thoroughly evaporating 100
millimeters of the liquid in a glass dish of a determined weight. Evaporation
may be accomplished by heating the dish at 200°F (93°C) for one-half hour.
If after evaporation and cool down, the residue exceeds 100 milligrams in
weight, the solvent cannot be reused for this purpose.
Flush with hot inhibited alkaline cleaner until free from oil and grease.
Rinse thoroughly with fresh water.
Dry thoroughly with a stream of clean air as described in the previous caution or by
heating 250°F to 300°F (121°C to 149°C) for one-half hour minimum.
PROTECTIVE COVERINGS ON OXYGEN COMPONENTS. USE WAXED
LACING TWINE OR TIE RAPS.
35-10-00
Apr 15/07
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