TWIN COMANCHE
C/R
4. ENGINE FAILURE DURING TAKE-OFF
a. If there is adequate runway remaining for deceleration - CUT POWER IMMEDIATELY
AND STOP STRAIGHT AHEAD.
b. If there is inadequate runway remaining and 95 MPH is not yet atta,med, the following
procedure is recommended:
(1) Throttle controls - closed
(2) Master switch - off
(3) Fuel valves - off
(4) Continue straight ahead, turning to avoid obstacles as necessary
C.
If engine failure occurs when airspeed is at or greater than 95 MPH the pilot must
decide whether to abort the take-off or attempt a single engine take-off. His decision must be
based on his judgment considering the runway remaining, density altitude, loading, obstruction.
weather and his own capability.
5.
ENGINE FAILURE DURING CLIMB
a. Feather inoperative engine (see feathering procedure)
b. Hold single engine best rate-of-climb speed of 105 MPH
C.
Monitor cylinder head temperature - adjust cowl flap as required
6. SINGLE ENGINE LANDING
a. Feather inoperative engine (see feathering procedure)
b. Do not extend landing gear until certain of making field.
ii:
Do not lower wing flaps until certain of making field.
Trim for landing - (rudder)
Maintain additional altitude and speed during approach, keeping in mind that landing should
be made right the first time and that a go-around may require the use of fulI power on the
operating engine, making control more difficult.
A final approach speed of 105 miles per hour and the use of half rather than full wing flaps
will place the airplane in the best configuration for a go-around should this be necessary, but it
should be avoided if at all possible. Under some conditions of loading or density altitude a
go-around may be impossible, and in any event the sudden application of power during single
engine operation may cause control difficulties.
7.
SINGLE ENGINE GO-AROUND
If a single engine go-around cannot be avoided proceed as follows:
it:
Throttle - open
Propeller - forward
i.
Landing Gear - retract
Flaps - retract
F:
Airspeed -
“One Engine Inoperative Best Rate-of-Climp Speed” 105 MPH
Trim-set
g.
Cowl Flap - as required (operating engine)
NOTE
Aircraft will not climb with gear and flaps extended.
REPORT: 1605 PART I PAGE 14
MODEL: PA-39
FAA APPROVED November l&l969
REISSUED. June 1 e 1970
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