Cessna 402C Pilot Operating Handbook page 89

(AMPLIFIED PROCEDURES)
SECTION 4
NORMAL PROCEDURES
1.
2.
3.
4.
5.
6.
7.
"-.,..,,.v
8.
If an obstruction ahead requires a steep climb angle, the airplane
should be flown at the all engines best angle-of-climb speed with wing
flaps up and maximum nonnal operations power. This speed varies from 84
KIAS at sea level to 88 KIAS at 16,000 feet.
During cruise climbs, positioning the propeller synchrophaser to PHASE
will eliminate the unpleasant audio beat accompanying unsynchronized opera-
tion. The propeller synchrophaser can also provide a significant reduction
in cabin vibration.
With the propellers slightly out of synchronization so that an audio
beat is obtained approximately once each 5 seconds, it should be noted that
the vibration level of the cabin and instrument panel will increase and
decrease at a rate of approximately once each 20 seconds. Optimum opera-
tion wi11 be obtained by manually synchronizing the propellers and posi-
tioning the synchrophaser switch to PHASE. Best propeller synchronizing is
obtained by making the final adjustment of the propeller controls in a
DECREASE RPM direction. For best operation, securely tighten the quadrant
friction lock to prevent the slaved propeller control fran creeping.
CRUISE
Cruise Power - 2100 to 2450 RPM and 15.0 to 29.5 inches Hg. or 2200
to 2300 RPM and 15.0 to 30.3 inches Hg.
Auxiliary Fuel Pumps - OFF (LOW, if fuel flow fluctuates).
a. Crossfeedin9 - LOW.
Mixtures - LEAN for desired cruise fuel flow as detennined from
your power computer. Recheck mi xtures if power, alt i-
tude or OAT changes.
Cowl Flaps - AS REQUIRED.
Propellers - SYNCHRONIZE manually.
Quadrant Fri cti on Lock - TIGHTEN securely (Wi th Synchrophaser In-
stalled) .
Propeller Synchrophaser - PHASE (Optional System). Light should
illuminate continuously.
a. Phasing Knob - ADJUST for desired phasing position.
Fuel Selectors - Left Engine - LEFT MAIN (Feel For Detent).
Right Engine - RIGHT MAIN (Feel For Detent).
r--------NDTE-------......,
Turn auxiliary fuel pumps to LCM and mixtures to
FULL RICH when switching tanks.
9. If oxygen use is desired, proceed as follows:
a. Mask - Connect mask and hose assembly and put mask on .
....-----IWARNING.---.....
Pennlt no smoking when using oxygen. Oil, grease,
soap, lipstick, lip balm, and other fatty materials
constitute a serious fire hazard when in contact
with oxygen. Be sure hands and clothing are oil-
free before handling oxygen equipment.
b.
Hose Coupling - Plug into oxygen outlet inside access door in
outboard armrest.
I November 1979
Revision 2 - 3 Aug 1981
4-19