Following decompression, the cabin pressure altitude
is considered to be the same as the flight altitude.
c. When flying at altitudes above 25,000 feet,
one mask per occupant must be coupled to the oxygen
outlet and immediately available C .
d. Oxygen system data/duration tables may be
found in Chapter 2.
5-36. CABIN PRESSURE LIMITS.
Maximum cabin differential pressure is 6.1 psi
C D T1 6.6. psi T2.
5-37. CRACKED CABIN WINDOW/WINDSHIELD.
If a crack occurs in a single ply of cabin exterior
window, the aircraft is limited to unpressurized flight. If
a crack occurs in both outer and inner plies of the
cabin exterior window, the aircraft shall not be flown
unless proper authorization is obtained for an
unpressurized ferry flight. If a crack occurs in an outer
ply windshield, no action is required in flight. If a crack
occurs in an inner ply windshield or if a crack occurs in
either/both plies of a cabin window, refer to emergency
procedures in Chapter 9.
Section VIII. OTHER LIMITATIONS
5-38. PASSENGER SEATS.
The cabin passenger seats may be used in the
forward or aft positions. The headrest and seat back,
when occupied, must be in the fully upright position for
takeoff and landing.
5-39. ILS LIMITS.
During an ILS approach, do not operate the
propellers in the 1750 to 1850 RPM range.
5-40. INTENTIONAL ENGINE CUT SPEED.
In-flight engine cuts below the safe one-engine
inoperative speed of Vsse, 104 KIAS are prohibited.
5-41. LANDING ON UNPREPARED RUNWAY.
Operation on unimproved, soft, or rough
surfaces is recommended only for aircraft
equipped with high floatation landing gear.
Except in an emergency, propellers should
be moved out of reverse above 40 knots to
minimize propeller blade erosion, and
during crosswind, to
imposed on propeller, engine and airframe.
Care shall be exercised when reversing on
runways with loose sand or dust on the
propeller blades and dust may impair the
pilots forward visibility at low airplane
speeds. The aircraft has demonstrated
landings on hard, smooth surfaces and dry
sod runways. Hard braking, i.e., skidding
tires while operating on other than smooth
surfaces, can result in damage to the
landing gear. When landing on other than
dry surfaces, use discretionary propeller
reverse to stop the airplane on the
5-42. MINIMUM OIL TEMPERATURE REQUIRED
blended with the fuel to avoid deterioration
of the fuel cell. The additive concentration
by volume shall be a minimum of .06% and
maximum .15%. Approved procedure for
adding anti-icing concentrate is contained
Chapter 2, Section XII.