SUPPLEMENTARY
PROCEDURES
ENVIRONMENTAL
AIRPLANE
O
PERATIONS
MANUAL
1-02-79
Page
16
Code
01
REVISION 41
Copyright © by Embraer. Refer to cover page for details.
NOTE: During approach and landing with engines and anti-icing
system on, the FADEC logic automatically reduces the Flight
Idle thrust when landing gear is lowered. On airplanes
equipped with an EICAS version earlier than the 16.5, the WG
1(2) A/ICE FAIL, WG A/ICE ASYMMETRY and/or STAB A/ICE
FAIL messages may be presented due to low bleed pressure
available. If these messages appear, the OPEN inscription on
the buttons may still be illuminated. To avoid those messages
from appearing, it is recommended to maintain a minimum of
55% N1 during descent and landing phases when landing gear
is down. Reducing N1 below 55% is recommended only when
needed for landing.
LANDING ON WET OR SLIPPERY RUNWAYS
Wet runways can cause airplane hydroplaning, the technical term
used to express slipperiness. The factors that influence the occurrence
of this phenomenon are high speed, standing water and poor runway
macrotexture. When hydroplaning occurs, it causes a substantial loss
of tire friction and wheel spin-up may not occur.
Icy runways can be very slippery at all speeds depending on
temperature.
Stopping the airplane with the least landing run must be emphasized
when landing on wet or slippery runways.
− Anticipate the approach procedures and speeds: a well-planned
and executed approach, flare and touchdown minimize the landing
distance.
− Immediately after touchdown, check the ground spoiler automatic
deployment when thrust levers are reduced to IDLE.
− Lower nose wheel immediately to the runway. It will decrease lift
and will increase main gear loading.
− Apply thrust reversers judiciously to observe how the airplane
responds before full reverse is used. Normal procedure is to move
the thrust levers out of reverse when ground speed is reduced to
50 kt. In an emergency, reverse thrust may be used to bring the
airplane to a full stop.
− Do not use asymmetric reverse thrust on slippery and icy runways.
− Apply brakes with moderate-to-firm pressure, smoothly and
symmetrically, and let the anti-skid do its job.
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