Change 19 5-21
Open ignition circuit breakers and make a
preliminary rotation of the engine to 15 seconds to en-
sure that the oil lines and external sump are full of oil and
there is oil flow.
With ignition circuit breakers open, rotate engine
for exactly 15 seconds. At least 16% N1 speed must be
achieved. Collect and measure oil flow during the 15
seconds of rotation period and during coast down until
engine stops. It is not necessary to collect and measure
A flow of less than 90 cc (3 oz.) indicates a signifi-
cant restriction of the oil nozzle and/or passages and is
cause for engine removal.
Cleaning of lubrication system internal com-
ponents should only be done at Depot Level
Remove oil drain tube.
Install the oil scavenge tube to the external sump.
Tighten coupling nuts (9) to 150-200 inch lbs.
f. Pilot: Check run engine to determine presence of
oil leakage at power turbine support pressure and scav-
enge oil system components.