Engine Lubrication; Engine Oil Level Check - Piper Cheyenne IIIA Airplane Maintenance Manual

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
R. Propellers
Check blades periodically for damage. Minor nicks in blade leading edges must be filed out and all
edges rounded. Daily inspection must include examination of blades and spinner for visible damage
and grease leakage. For further information on servicing propeller, refer to Chapter 61 / AC 43.13-1A,
Section III on propeller repairing.
S. Engine Lubrication
CAUTION: DO NOT MIX DIFFERENT BRANDS OR SPECIFICATIONS OF OIL. CHEMICAL
STRUCTURES CAN DIFFER, MAKING OILS INCOMPATIBLE.
Check engine oil level within ten minutes after engine shutdown. If engine is stationary for 12 hours or
more; start it, run at idle for minimum 2 minutes, shutdown, and check oil not more than 10 minutes
later. For engines operated in corporate or utility aircraft with typical usage of 50 hours per month or
less, change oil every 400 hours of 9 months, whichever occurs first. For engines operated in high
utilization commuter airlines, basic oil change periods are 800 hours for 7 1/2 centistoke oil, or 1200
hours for a 5 centistoke oil, or 9 months. Extensions beyond basic oil change period are considered
provided oil is monitored by spectrometric oil analysis and a written request is submitted to Pratt &
Whitney Canada Limited Service Department. When operation results in frequent cold soaking at
ambient temperatures of 0°F (-18°C) or lower, use 5 centistoke oil. For further information, consult
latest Pratt & Whitney Service Bulletin 13001.
When changing brand or type of engine oil, flush lubrication system. Refer to draining engine oil
section for proper procedure.
T. Engine Oil Level Check
CAUTION: IF OIL LEVEL IN TANK IS BELOW BOTTOM OF DIPSTICK, DETERMINE CAUSE TO
TROUBLESHOOT. IF NEITHER FLUCTUATING OR LOW OIL PRESSURE
READINGS ARE NOTICED, CHECK FOR EXTERNAL LEAKS AND OIL FILTER
CONTAMINATION. CLEAN OIL FILTER AND FILL OIL TANK TO RECOMMENDED
LEVEL. RECORD OIL QUANTITY ADDED, COMPLETE 15 MINUTE ENGINE RUN,
AND RECHECK OIL QUANTITY AND CONDITION OF OIL FILTER. IF BOTH ARE
SATISFACTORY, NO FURTHER ACTION IS NECESSARY. OTHERWISE, REFER TO
ENGINE MAINTENANCE MANUAL.
Within 10 minutes following engine shutdown, unlock filler cap at 11 o'clock position on accessory
gearbox housing. Check contents of tank against marks on dipstick and fill to required level.
NOTE: Normal oil level is one quart below maximum level. Do not fill oil tank more than one quart
below maximum mark.
EFFECTIVITY:
040-999
12-10-00
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