Piper Navajo Chieftain PA-31-350 Service Manual page 510

NAVAJO CHIEFTAIN SERVICE MANUAL
TABLE VIII-IV. TROUBLESHOOTING CHART (TURBOCHARGER) (cont)
Trouble
Cause
Remedy
White exhaust. (cont.)
Engine idles too slow -
Increase engine idle speed
turbo not turning.
to a maximum of 700 RPM,
if turbo still smokes, it
must be overhauled or re-
placed.
Waste gate won't open.
Jammed piston seal in
Remove and replace unit.
bypass valve or bearing
seizure.
Obstruction in oil outlet.
Blocked oil drain return
line.
Broken linkage.
Waste gate won't close
completely.
Controller malfunction.
Obstruction in oil inlet
orifice.
Leaking valves in con-
troller.
Piston seal in bypass
valve worn or broken.
Clean return lines.
Clean line.
Replace linkage and adjust
waste gate to open and close
position to specifications
in overhaul manual.
Replace controller.
Replace controller.
Replace controller.
Replace controller.
Reissued: 9/23/80
POWER PLANT
2J23