Engine Run-Up; Before Takeoff - Piper PA-24-250 COMANCHE Pilot Operating Handbook

Amraft Publical~ons
Piper Comanche 2% (Early Model)
Section
-
4
Normal Procedures
ENGINE
RUN
UP
Brakes et
Warm m
Mixture ................................................................................................................... Check R~ch
**
NOTE
* *
Above 5,000
ft
density altitude, mixture should be leaned for takeoff until, and only until, any
engine roughness is eliminated.
Propeller Control ......................
. .
...................................... Check Full Forward - Increase rpm
Throttle
........................
. .
.........................................................................................
2000 rpm
**
CAUTION
** Do not exceed 2200 rpm in a routine static test
Manifold Pressure
.......................................................................................................
15 in Hg
Magnetos
...................................................................................................
Check Lei? and Right
Maximum Drop
-
175 rpm
Maximum Difference
-
50 rprn
Carburetor Heat ............................................................................................ Check and Clear
**
CAUTION
** Avoid prolonged ground operation with carburetor heat on, as the air is unfiltered.
5.0 in Hg
+
. l
or - .2 in
.............................................
Check Charging
Check
Oil Pressure
...........................................................................................................
Check Green
Propeller ........................................... Cycle as Needed to Circulate Oil and Operate Governor
Normal Drop
-
300 to 400 rprn
**
CAUTION
** DO not exceed a 500 rprn drop for more than a few seconds at a time.
Throttle
............................................................................................................................
Retard
BEFORE TAKEOFF
Fuel Selector
.....................................................................
Leave on Previously Selected Tank
Electric Fuel Pump ..............................................................................................................
On
Flaps .........................
. .
........................ Set for Takeoff (Zero,
9 or 18 Degrees as Desired)
Trim Tab ................................................ Set for Takeoff (Neutral Position for Most Operations)
Directional Gyro
............................... . . ..............................................................
Set Heading
Engine Gauges .........................
. .
.................................................................................
Normal
Strobe Lights (If Installed) ...................
. . ...... . . . . . . . . . . . .
............................................................... On
**
NOTE
**
Engine is warm enough for takeoff when throttle can be opened without the engine faltering.
Copyright:
1993
Page 4-7