5.
Be careful that the stair unit can not roll toward the aircraft and release
the parking brake. Chock ahead of the wheels if necessary. Roll or tow
the stair unit away from the aircraft. When parked, reapply the parking
brake.
6.
Pull the red over ride knob on the stair valve labeled SV2 and insert the
slotted lock tool under the knob to keep it extended.
7.
Operate the pump with the handle to extend the stair slightly and relieve
the pressure from the stair lock lever.
8.
With the ignition and master switches on, have a helper hold the STAIR
RELEASE switch to release the stair lock lever. Then remove the tool
from under the valve over ride knob. Push the knob in and allow the stair
to retract by gravity.
9.
If emer gency man ual op er a tion is re quired to lower the stair, and
elec tri cal power is not avail able, a sec ond per son will be re quired to hold
the stair lock re lease le ver down while the hand pump is op er ated.
Have your helper op er ate the stair lock le ver with a stick to
pre vent plac ing hands or body in un safe lo ca tions where se ri ous in jury could
oc cur as the stair low ers.
2.7 SERVICING LOADING FACILITIES OTHER THAN AIRCRAFT
Whenever the stair is positioned to a loading facility (such as a loading bridge) it is likely
that there will be a significant difference in the loading access area compared to the
width of the stair. You must install barriers or railings that conform to OSHA
specifications and regulations to restrict the opening to the width of the stair wings.
SEPTEMBER 30, 2008
CHAPTER 1 GENERAL INFORMATION & OPERATION INSTRUCTIONS
PAGE 12
2 OPERATION
Truck Mounted Passenger Stair TMPS-200
Manual No. 307559
