Recommendations For Changing Oil; Oxygen System; Oxygen System Safety Precautions - Piper Cheyenne IIIA Airplane Maintenance Manual

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
X. Recommendations For Changing Oil
NOTE: Refer to Pratt & Whitney Service Bulletin No. 13001.
1. Major factors concerning oil change frequency are engine mechanical condition, spectrometer
analysis of used oil, climatic conditions, dust and sand ingestion during takeoff and landing roll,
engine usage, and shelf life limitations of synthetic lubricants.
2. Whenever oil is changed, remove and check oil filter element for metal particles. Clean, reinstall,
or replace depending on time in service. (See Servicing Oil Filter Elements.)
3. Only use oils listed in Pratt & Whitney Service Bulletin No. 13001.
CHART 1
THREAD LUBRICANTS
TYPE OF LINE TYPE OF LUBRICANT
Brake MIL-H-5606
Deicer (Air) TT-A-580 (JAN-A-669), Anti-Seize Compound
(White Lead Base)
Fuel MIL-T-5544, Anti-Seize, Graphite Petrolatum
Oil
MIL-G-6032, Lubricating Grease (Gasoline and
Oil Resistant)
Oxygen
MIL-T-5542, Thread Compound, Anti-Seize and Sealing,
Oxygen System
Pitot and Static TT-A-580 (JAN-A-669), Anti-Seize Compound
(White Lead Base)
Engine - Bleed Air C5-A High Temperature Anti-Seize Compound
NOTE: Lubricate engine fittings only with fluid contained in particular lines.
Y. Oxygen System
Breathing system oxygen is furnished from a stationary cylinder in the aft section of the forward
compartment. Service and maintenance instructions for the oxygen system is found in 35-00-00.
1. Oxygen System Safety Precautions
WARNING: FOREIGN MATTER IN HIGH PRESSURE LINES CAN CAUSE AN EXPLOSION.
WHEN COMING IN CONTACT WITH OXYGEN EQUIPMENT, KEEP HANDS, TOOLS,
AND CLOTHING CLEAN.
Use extreme caution when servicing, handling, and inspecting the oxygen system. Comply with
the following precautions:
(a) Keep oxygen regulator, cylinder, gauge, valve, fittings, masks, and all other oxygen system
components free of oil, grease, fuel, and other readily combustible substances.
(b) Do not allow foreign matter to enter oxygen lines.
(c) Never attempt to repair or repaint oxygen equipment.
(d) Keep fire and heat away from oxygen equipment. Do not smoke when working with or near
oxygen equipment. Do not generate sparks when using tools.
(e) Never allow electrical equipment to contact oxygen cylinder.
(f) Use only thread compound approved under MIL-T-5542 on oxygen systems. Apply only to first
thread of male fittings to prevent thread seizure.
EFFECTIVITY:
040-999
12-10-00
PAGE 13