2.  
Place filter element in electrosonic cleaner tank.

3.  
Add sufficient quantity of cleaning solvent to tank. (Approximately 1/4 inch below top edge of tank.)

4.  
Operate unit for 10 minutes.

°

5.
Rotate element (end-to-end) 180 in cleaning tank and operate unit for additional 10 minutes.

6.  
Remove element from tank using clean, lint-free gloves; remove plugs.

7.  
Place element in clean location and allow to dry.

8.  
After element is cleaned, inspect with magnifying glass for clogged passages and broken wires. If morethan five percent of visible passages are clogged, return element to overhaul facility. If dents or broken wires are found, replaceelement.

9.  
Installnew O-rings on filter element whether element is cleaned or new.

10.
Insertfilter element (perforated flange first) into filter housing in compressor inlet case.

NOTE: Adjustcleaning duration dependingon condition of element. For best results, replace cleaning solvent every 20 minutes.
EFFECTIVITY:
040-999
12-10-00Jan 10/90
PIPERAIRCRAFT

PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

W. ServicingOil Filter Elements(continued)
11. InstallnewO-ringon filter cover.
NOTE:  Ensureteflonspaceris in positiononfilter cover studs.
12.
Installfiltercoverand secure with four plain washersand self-locking nuts. Tightennutsand torqueto 24 -36 inch-pounds.

13.
Cleandual drive oil filter every 100 hours.

(1/4
Plug
CleaningTank
NOTE:  ElectrosonicCleanerTankmay be procuredfrom: AerosupportInternational,Inc. 75 de la Moselle St. Lamber, Quebec J45 1W3 Canada P/N Sonac S-2
ElectrosonicCleaningTank
Figure 303

EFFECTIVITY:
040-999

Jan 10/90
Jan 10/90 12-10-0012-10-00
PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCEMANUAL

X.  RecommendationsFor Changing Oil
NOTE: Referto 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, OxygenSystem 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.  OxygenSystem
Breathingsystem 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: FOREIGNMATTER IN HIGH PRESSURE LINES CAN CAUSE AN EXPLOSION. WHEN COMING IN CONTACT WITH OXYGEN EQUIPMENT,KEEPHANDS, TOOLS, AND CLOTHING CLEAN.
Use extreme caution when servicing, handling, and inspecting the oxygen system. Complywith
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 combustiblesubstances.

(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 oxygenequipment. Do not generate sparks when using tools.

(e)
Neverallow electrical equipment to contact oxygen cylinder.

(f)  
Use only thread compound approved under MIL-T-5542on oxygen systems. Apply only to first thread of male fittings to prevent thread seizure.

EFFECTIVITY:
040-999
12-10-00PAGE

PIPERAIRCRAFT

PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

Y. OxygenSystem(continued)
2. FillingOxygenCylinder
　
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