Embraer EMB145 Operation Manual page 1468

AIRSTAIR MAIN DOOR
The airplane is provided with one main entry door located on the left
forward fuselage section and is designed as type I door.
The main door, incorporating folding air stairs, is hinged at its lower
edge. The door is raised in normal operation by two hydraulic door
actuators powered by hydraulic system 1 or by an accumulator with
sufficient capacity for four complete door operation cycle.
The door opening operation is manual. The hydraulic circuit damping
function allows a smooth operation when the door is lowered.
The system may be controlled from inside or outside, through the
entrance panel or through the exterior main door control panel,
respectively.
The door may also be closed and locked raising it manually, by an
outside ground attendant, and actuating either the inner or the outer
handle.
An alternative opening valve is provided in the cockpit to allow the
main door to be lowered if it is blocked by hydraulic system pressure
(solenoid valve failure).
NOTE: - No more than three persons should be standing on the
doorsteps simultaneously.
- If the need arises, a person may be carried into and out of
the airplane by two people provided there is at least one
load-free step between the carriers and the sum of the
weight of the three people is no more than 231 kg (509 lb). If
at least one of the carriers weighs more than 77 kg (169 lb),
the heavier one should be the first to step onto the stair when
getting in the airplane, and the last one when getting out.
EICAS MESSAGE
TYPE
WARNING MAIN DOOR OPN
REVISION 38
AIRPLANE
OPERATIONS
MANUAL
MESSAGE MEANING
Main door is open or not properly
locked either on the ground with
engine 1 running or in flight.
2-02-35
EQUIPMENT
AND FURNISHINGS
Page Code
1 01