Table of Contents
Advertisement
SUPPLEMENTAL
AIRPLANE FLIGHT MANUAL
AUXILIARY FUEL PUMP
SWITCHING SYSTEM
isfactory operation. At high manifold pressure and RPM, auxiliary fuel pump
output may not be sufficient for normal engine operation. In this case, reduce
manifold pressure to a level compatible with the indicated fuel flow. At low
powers, the mixture may have to be leaned as necessary for smooth engine
operation. If HIGH auxiliary pump output does not restore adequate fuel flow, a
fuel leak may exist and the auxiliary pump should be shut off, the engine secured
and propeller feathered, and the flight terminated on the remaining engine.
On rare occasions, such as during engine starting in cold weather, the HIGH
position (instead of LOW) may be needed for a few seconds to ensure a good
ground start or restart in flight.
A
CAUTION
If the auxiliary fuel pump switches are placed in the
HIGH position with the engine-driven fuel pump(s) op-
erating normally, total loss of engine power may occur.
When performing training in single-engine operations, the auxiliary fuel
pump of the engine to be shutdown should be turned OFF (if it was on LOW)
prior to any simulated engine failure or prior to any intentional engine shutdown
to preclude fuel accumulation in the engine intake system.
The following limitations and procedures apply only to the operational
changes of the auxiliary fuel pump switches and not the entire procedure.
SECTION 2
LIMITATIONS
The following new placard· is provided to identify that the airplane has been
modified and show the proper switch positions for normal operation. It is located
on the left cabin sidewall near the auxiliary fuel pump switches and must be
installed when the airplane is modified in accordance with Cessna Multi-Engine
Service Bulletin MEB88-3.
Original Issue
THE AUXILIARY FUEL PUMP
SYSTEMS IN THIS AIRPLANE
HAVE BEEN MODIFIED BY
SERVICE BULLETIN MEB88-3.
AUX PUMP LOW FOR TAKEOFF,
LANDING AND VAPOR CLEARING.
AUX PUMP HIGH FOR ENGINE
DRIVEN PUMP FAILURE
(VERY LOW OR NO FUEL PRESS).
SEE POH OR AFM SUPPLEMENT
OR SUPPLEMENTAL AFM.
2Sll505!1-6
3
Advertisement
Table of Contents
