Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 759 / 881

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