Cessna 402C Pilot Operating Handbook page 243

~;:A02C SECTION 7
AIRPLANE & SYSTEMS DESCRIPTIONS
-
The airplane is delivered from the factory with corrosion preventive oil
in the engine. This oil allows fast ring seating and should not be used
any longer than 25 hours. If during the first 25 hours oil must be added,
use only aviation grade straight mineral oil conforming to Specification
MIL-L-6082. Refer to Section 8 for additional oil servicing information.
TURBO-SYSTEM
Each engine is equipped with a turbocharger and related components to
allow takeoff and engine inoperative power to 12,000 feet and maximum
normal operations power to 16,000 feet.
The engines work and act just like any normally aspirated engines; how-
ever, because the engines are turbocharged, some of the engine character-
istics are different. The intent of this section is to point out some of
the items that are affected by turbocharging, and outline the correct
procedures to be followed.
For a better understanding of the Turbo-System, let us follow the induc-
tion air through the engine until it is expelled as exhaust gases. Refer-
ence should be made to the Turbo-System Schematic shown in Figure 7-23
when reading through the following steps.
TURBO-SYSTEM SCHEMATIC
INDUCTION AIR FILTER
(2) COMPRESSOR
THROTTLE VALVE
<J
-
(3) INDUCTION
MANIFOLD
(4) EXHAUST
J
MANIFOLD
I
(1) INDUCTION
AIR INLET
CODE
AMBIENT ENGINE
INDUCTION AIR
PRESSURIZED ENGINE
INDUCTION AIR
ENGINE EXHAUST AIR
MECHANICAL ACTUATION
52982007
52146003
1 November 1979
Figure 7-23
7-39