Piper COMANCHE PA-24-180 Service Manual page 63

PIPER COMANCHE SERVICE MANUAL
TABLE II-IV INSPECTION - OVERHAUL TIME LIMITS
PARTS
INSPECTION
OVERHAUL
Regulator
Pressure Gauge
High Pressure Lines
Low Pressure Lines
Outlets (Cabin)
External Recharge Valve
Masks
300 Flight Hrs
300 Flight Hrs.
300 Flight Hrs
300 Flight Hrs
300 Flight Hrs.
Each Use
Each Use
5 Yrs.
5 Yrs
5 Yrs.
Replace Every 5 Yrs
Replace as Necessary
2-60. Testing for Leaks. Apply detector fluid type CD-I solution or its equivalent The solution should be
shaken to obtain suds or loam. The suds or foam should be applied sparingly to thejoints of a closed system
Look for traces of bubbles No visible leakage should be found. Repair or replace any defective pans and
retest system With the system pressurized to service pressure. further tests can be made. The rate of any leak
should not exceed one percent of the total supply per 24 hour period All traces of the detector fluid should be
wiped off at the conclusion of the examination
2-61. Maintenance.
a. Check that all lines have sufficient clearance between all adjacent structures and are secured in
place Also, check the cylinder to be sure it is securely mounted.
b. Check the cylinder for the ICC or DOT identification number and for the date of the last FAA
inspection and test.
c. If cylinder is completely empty. it must be completely disassembled and inspected in an FAA
approved facility before recharging
d. Any lines that are defective should be replaced with factory replacements.
e Clean all lines and fittings as described in Paragraph 2-62
f
Use Ribbon Dope Thread Sealant (Permacel 412) on male ends of fittings only Wrap thread in
direction of thread spiral, beginning with the second thread on the fitting. Avoid getting any sealant into the
lines.
g. Refer to FAA Manual AC 43 13-1A for more service details.
2-62. Cleaning Operations. To remove oil and grease from tubing and fittings. one of the following cleaning
methods may be used
a First Method'
I A vapor degreasing with stabilized trichlorethylene conforming to specification M IL-T-7703
shall be used
ADDED: 4/3/78
HANDLING AND SERVICING
1C15