Engine Power Loss In Flight - Piper WARRIOR III PA-28-161 Pilot Operating Handbook

SECTION 3
EMERGENCY PROCEDURES
If engine failure was caused by fuel exhaustion, power will not be
regained after switching fuel tanks until the empty fuel lines are filled. This
may require up to ten seconds.
If power is not regained, proceed with the Power Off Landing procedure
(refer to the emergency check list and paragraph 3.13).

3.11 ENGINE POWER LOSS IN FLIGHT

Complete engine power loss is usually caused by fuel flow interruption,
and power will be restored shortly after fuel flow is restored. If power loss
occurs at a low altitude, the first step is to prepare for an emergency landing
(refer to paragraph 3.13). An airspeed of at least 73 KIAS should be main-
tained.
If altitude permits, switch the fuel selector to another tank containing
fuel and turn the electric fuel pump ON. Move the mixture control to RICH
and the carburetor heat to ON. Check the engine gauges for an indication
of the cause of the power loss. If no fuel pressure is indicated, check the tank
selector position to be sure it is on a tank containing fuel.
When power is restored move the carburetor heat to the OFF position
and turn OFF the electric fuel pump.
If the preceding steps do not restore power, prepare for an emergency
landing.
If time permits, turn the magneto switch to L then to R then back to
BOTH. Move the throttle and mixture control levers to different settings.
This may restore power if the problem is too rich or too too lean a mixture
or if there is a partial fuel system restriction. Try other fuel tanks. Water in
the fuel could take some time to be used up, and allowing the engine to
windmill may restore power. If power loss is due to water, fuel pressure
indications will be normal.
If engine failure was caused by fuel exhaustion, power will not be
restored after switching fuel tanks until the empty fuel lines are filled. This
may required up to ten seconds.
If power is not regained, proceed with the Power Off Landing procedure
(refer to the emergency checklist and paragraph 3.13).
REPORT: VB-1565
3-10
PIPER AIRCRAFT CORPORATION
PA-28-161, WARRIOR III
ISSUED: JULY 1, 1994