Turbocharger Rotating Assembly Binding Or Dragging; Turbocharger Seal Leakage At Turbine End - Piper PA-44-180 SEMINOLE Maintenance Manual

CHART 8101. TROUBLESHOOTING (TURBOCHARGER) (cont.)
Trouble
Turbocharger output low or
operates sluggishly (cont.)
Turbocharger rotating assembly Compressor wheel damaged by
binding or dragging.
Turbocharger seal leakage at
turbine end.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
Cause
Heavy sludge or coking in center
housing.
foreign object.
Turbine wheel damaged by
foreign object.
Heavy carbon buildup behind
turbine wheel.
Heavy sludge or coking in center
housing.
Excessive prelube of turbo-
charger.
Restriction in engine crankcase
breather.
Restriction or faulty check valve
in turbocharger oil drain line.
Malfunction in oil scavenge
pump or drain sump.
Worn or damaged turbine
wheel.
Heavy sludge or coking in center
housing.
Engine malfunction (Piston
blowby or high internal crank-
case pressure.
3J5
Remedy
Overhaul turbocharger as
needed. Service engine
lubrication system.
Clean and repair air induction
system. Overhaul turbocharger.
Clean and repair exhaust
system. Overhaul turbocharger.
Overhaul turbocharger as
needed.
Overhaul turbocharger. Service
engine lubrication system.
Perform correct prelube of
turbocharger.
Remove restriction,
Remove restrictions or replace
faulty check valve.
Refer to engine manufacturer's
maintenance manual.
Clean and repair exhaust system
as needed. Overhaul turbo-
charger.
Overhaul turbocharger-service
engine lubrication system.
Refer to engine manufacturer's
maintenance manual.
Page 81-03
Revised: May 15, 1989
8 1 - 0 2 - 0 0