pressure fuel pump obtains essential
lubrication from fuel flow. When an
engine is operating, this pump may
switches turned OFF, landing gear,
wing flaps, and auxiliary and transfer
cavitating) if the firewall valve is
pump circuits will be inoperative. If
closed before the condition lever is
deemed reasonably safe, turn on
moved to the FUEL CUTOFF position.
enough to extend the landing gear
b. Boost Pump Failure. If the L or R FUEL FAIL
and then turn it off again. Otherwise
light illuminates in flight proceed as follows:
extend the landing gear manually and
land with the wing flaps up.
1. Auxiliary fuel pump (affected engine) -
e. Smoke and Fume Elimination. To eliminate
smoke and fumes from the aircraft, perform the
2. Fuel fail light - Check extinguished.
c. Fuel Leaks/Syphoning. The action to be taken
(O)1. Crew oxygen masks - On.
in the event of fuel leaks or syphoning depends upon the
origin and severity of fuel loss.
(O)2. Passenger masks - On. The copilot should
confirm that all passengers are receiving
(1) If fuel filler cap syphoning occurs proceed
1. Airspeed - 123 KCAS (120 KIAS).
2. Land as soon as practicable.
9-9. Fuel System.
a. Fuel System Emergencies . The engine will
operate with an engine driven fuel boost pump
failure. However, failure of an engine-driven (high
During single-engine operation the fuel
pressure) fuel pump will result in engine fuel
supply for the dead engine may be used to supply the
starvation. Perform the SINGLE-ENGINE procedure
live engine by routing the fuel through the crossfeed
and land as soon as practical.
system. Use the following procedure for fuel crossfeed
during single-engine operation:
2. Auxiliary fuel pump (dead engine) - ON.
Do not use fuel firewall valve to shut
down engine operation, except in an
3. Crossfeed - OPEN.
emergency. The engine-driven high-
9-12 Change 8