STINAR PS-813B/E - Raising the Stairway; Lowering the Stairway; Operating A-Frame; Boarding and Disembarking Passengers

Passenger Stairway PS-813B/E Boeing | 16
SECTION 1 - PROCEDURES, SPECS & CAPABILITIES
11. Adjust A-frame height until platform is level with door sill and
platform bumper makes slight contact with aircraft.
1.2.3.4 | Raising the Stairway
1. Ensure that the stairway engine is running.
2. Raise stairway by holding STAIRWAY control valve handle (Figure
1.1.3.1) in UP position. Continue to raise stairway until upper stairs
steps are about 1 inch above lower stairs steps.
3. Lower stairs until the mechanical lock on the stairs ratchet engages.
See procedures below.
1.2.3.5 | Lowering the Stairway
1. Raise stairway approximately 1 inch to clear ratchet.
2. Raise stairway ratchet release handle.
3. Move STAIRWAY control valve handle to DOWN position. Hold until
stairway is at desired height. Stairs may be stopped at any ratchet
position by releasing the ratchet handle.
1.2.3.6 | Operating A-frame
1. Push unit forward until platform bumper makes slight contact
with aircraft.
2. Ensure that engine is running.
3. Lower the stabilizers, as this will cause the platform to raise slightly.
4. Adjust A-frame height so that platform is level with door sill and
platform bumper makes slight contact with aircraft.
5. To raise A-frame, proceed as follows:
• Move A-FRAME control valve handle to UP position and hold
until A-frame is at desired height.
6. To lower the A-frame, proceed as follows:
• Move A-FRAME control valve handle to UP position. Raise
A-frame approximately 1 in. to clear ratchet.
• Raise A-frame ratchet release handle.
• Move A-FRAME control valve handle to DOWN position. Hold
until platform is at desired height.
1.2.3.7 | Boarding and Disembarking Passengers
1. Push stairway into position using procedures above. With engine
running, adjust platform height and position stairway so that
platform bumper is in contact with aircraft.
2. Lower stabilizers by holding the stabilizer down lever until all
stabilizers are fully down.
WARNING!
Do not start or run engine in
a closed or poorly ventilated
building where exhaust gases
can accumulate. Avoid breath-
ing these gases as they contain
poisonous carbon monoxide,
which can endanger your
health or life.
CAUTION!
Using the electric starter for
more than ve seconds at a
time will overheat the starter
motor and can damage it.
CAUTION!
DO NOT MOVE CHOKE CON-
TROL TO CLOSED POSITION TO
STOP ENGINE. Backre or en-
gine damage may occur. Move
throttle control to SLOW posi-
tion, then switch engine OFF.