Specifications

SECTION IV
MODEL 560 OPERATING INFORMATION
WHEEL FUSIBLE PLUG CONSIDERATIONS
Brake application reduces the speed of an airplane by means of friction between the brake stack
components. The friction generates heat, which increases the temperature of the brake and wheel
assembly, resulting in an increased tire pressure. Each main wheel incorporates fuse plugs, which melt at
a predetermined temperature, to prevent a possible tire explosion due to excessively high tire pressure.
Flight crews must take precautions when conducting repetitive traffic circuits, including multiple landings
and/or multiple rejected takeoffs, to prevent overheating the brakes, which could melt the fuse plugs and
cause loss of all tire pressure and possible tire and wheel damage. During such operations, available
runway permitting, minimize brake usage, and consider cooling the brakes in flight with the landing gear
extended. Maximizing use of reverse thrust and extending speed brakes will assist in bringing the airplane
to a stop.
THE SAFE FLIGHT ANGLE-OF-ATTACK/STALL WARNING SYSTEM
The Safe Flight Angle-of-Attack (AOA)/Stall Warning System incorporates a dual mode: Normal Mode
and Ice Mode. On the ground, with engine anti-ice selected on, changing from Normal Mode to Ice Mode is
delayed until after the airplane has been airborne for 150 seconds (+/-30s). In-flight switching between
modes is immediate and indications change accordingly when engine anti-ice is selected ON or OFF.
NORMAL MODE
Stick shaker activation, angle of attack meter, angle of attack indexer (as installed) and low airspeed
awareness are all referenced to standard airplane stall speeds.
ICE MODE
Activated when either or both engine anti-ice switches are ON. Stick shaker activation, angle of attack
meter, angle of attack indexer (as installed) and low airspeed awareness are all referenced to the standard
airplane stall speeds plus 5 knots. This is to account for residual airframe ice present during or after an
icing encounter.
I 56OMB-01 Configuration AA 4-23