Turbulent Air Operation; Vsse - Intentional One Engine Inoperative Speed - Piper PA-44-180 Seminole 1979 Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

SECTION 4
NORMAL PROCEDURES

4.47 TURBULENT AIR OPERATION

In keeping with good operating practice used in all aircraft, it is
recommended that when turbulent air is encountered or expected, the airspeed
be reduced to maneuvering speed to reduce the structural loads caused by gusts
and to allow for inadvertent speed build-ups, which may occur as a result of
the turbulence or of distractions caused by the conditions. (See Subsection 2.3)

4.49 VSSE - INTENTIONAL ONE ENGINE INOPERATIVE SPEED

VSSE is a speed selected by the aircraft manufacturer as a training aid
for pilots in the handling of multi-engine aircraft. It is the minimum speed for
intentionally rendering one engine inoperative in flight. This minimum speed
provides the margin the manufacturer recommends for use when intentionally
performing engine inoperative maneuvers during training in the particular
airplane.
The intentional one engine inoperative speed, VSSE, for the PA-44-180 is
82 KIAS.
4.51 VMCA - AIR MINIMUM CONTROL SPEED
VMCA is the minimum flight speed at which a twin-engine airplane is
directionally controllable as determined in accordance with Federal Aviation
Regulations. Airplane certification conditions include one engine becoming
inoperative and windmilling; not more than a 5º bank toward the operative
engine; landing gear up; flaps in takeoff position; and most rearward center of
gravity.
VMCA for the PA-44-180 has been determined to be 56 KIAS and is a
stalled condition.
The VMCA demonstration, which may be required for the FAA flight
test for the multi-engine rating, approaches an uncontrolled flight condition
with power reduced on one engine. The demonstration and all intentional one
engine operations should not be performed at an altitude of less than 4000 feet
above the ground. The recommended procedure for VMCA demonstration is
to reduce the power to idle on the simulated inoperative engine at or above the
intentional one engine inoperative speed, VSSE, and slow down approximately
one knot per second until the FAA Required Demonstration Speed, VMCA, or
stall warning is obtained.
A rapid reduction in power (full throttle to idle
in less than 2 seconds) may be harmful to the
engine.
REPORT: VB-860
4-26
PIPER AIRCRAFT CORPORATION
NOTE
ISSUED: MARCh 23, 1978
REVISED: OCTOBER 11, 2011
PA-44-180, SEMINOLE