Lycoming TIO-540-A1A, Operator'S Manual

Page: 124 / 138

SECTION 6 LYCOMING OPERATOR’S MANUAL
TROUBLE-SHOOTING TIO-540 SERIES – ANGLE VALVE CYLINDER HEADS
TROUBLE PROBABLE CAUSE REMEDY
Engine will not Deliver Exhaust bypass butterfly not Low pressure. Clogged orifice in
Rated Power (Cont.) closing inlet to actuator.
Butterfly shaft binding. Check
bearings.
Turbocharger impeller binding, Check bearings. Replace turbo-
frozen or fouling housing charger.
Piston seal in actuator leaking Remove and replace actuator or
(usually accompanied by oil disassemble and replace packing.
leakage at drain line)
Critical Altitude Lower than Controller not getting enough oil Check pump outlet pressure, oil
Specified pressure to close exhaust bypass filters, external lines for leaks or
obstructions.
Chips under metering valve in Replace controller.
controller holding it open
Metering jet in actuator plugged Remove actuator and clean jet.
Actuator piston seal failed and If there is oil leakage at actuator
leaking excessively drain, clean cylinder and replace
piston seal.
Exhaust bypass valve sticking Clean and free action.
Engine Surges or Smokes Air in oil lines or actuator Bleed system.
Controller metering valve stem Replace controller.
seal leaking oil into manifold
Clogged breather Check breather for restrictions to
air flow.
NOTE
Smoke would be normal if engine has idled for a prolonged period.
High Deck Pressure (Compressor Controller metering valve not Replace controller assembly or
Discharge Pressure) opening, aneroid bellow leaking replace aneroid bellows.
Exhaust bypass sticking closed Shut off valve in return line not
working.
Butterfly shaft binding. Check
bearings.
Replace exhaust bypass valve or
correct linkage binding.
6-6