(b)
Move handle to the door latched position. Maximum force should not exceed 25 pounds.
(2) Check force required to operate exterior control handle.
NOTE: Measure force at a point 2 inches from the end of the handle and normal to handle pivot.
(a)
Move handle to the door unlatched position. Maximum force should not exceed 90 pounds.
(b)
Move handle to the door latched position. Maximum force should not exceed 37 pounds.
(3)
Provide electrical power to the aft airstair system.
(4)
Check that all indicator and master caution circuit breakers on P6 panel are closed.
(5)
Move interior airstair control switch to the extend position. There should be no motion of the airstair . Release switch.
(6)
Move interior control handle to the door unlatched position.
(a)
Door latch pin should move to the unlatched position.
(b)
Aft entry door should raise to clear the door cam rollers.
(c)
The exterior control handle should move to the door unlatched position.
(d)
The AFT ENTRY light on P5 panel, both MASTER CAUTION lights, and the DOORS light of the master caution annunciator should illuminate.
(7)
Extend airstair electrically making checks during and after extension as follows:
(a)
Place airstair tread lights switch, located on aft attendant’s panel, in the AUTO position.
(b)
Place interior airstair control switch in the extend position and hold switch in this position until airstair is fully extended.
NOTE: After the airstair is driven to the free fall position (approximately 10 degrees stair angle) the rate of fall is controlled by the drive motor until the extend limit switch has actuated. Early release of interior airstair operating switch from the extend position will deactivate breaking action of the motor and allow stair to ride and wear the emergency extend speed governor.
(c)
Check that airstair starts its free fall when the end of the lower ladder is approximately 1 foot off the ground on airplanes using the 10-61339-4 aft transmission unit and 3-1/2 feet off the ground on airplanes using the 10-61339-6 or -10 aft transmission unit.
(d)
Check that 30 to 45 seconds are required for full extension of airstair.
(e)
Check that stair operates smoothly during extension.
(f)
Check that tread lights are extinguished during extension of airstair and become illuminated at completion of extension.
(g)
Place airstair tread lights switch in off position. Check that lights are extinguished. Return switch to the auto position and check that tread lights are illuminated.
(h)
Place the interior airstair control switch in the extend position. There should be no motion in the drive unit. Release switch.
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(i) Check that movement of interior control handle is restricted to an arc of 11 degrees maximum toward the door latched position from the door unlatched position.
(8)
Retract airstair electrically making checks during and after retraction as follows:
(a)
Place interior airstair control switch in the retract position and hold switch in this position until airstair is fully retracted. Retract limit switch should remove power from drive unit. Release switch.
(b)
Check that 35 to 45 seconds are required for full retraction of airstair.
(c)
Check that stair operates smoothly during retraction.
(d)
Check that tread lights are extinguished as airstair starts to retract.
(e)
After retraction place airstair tread lights switch in the ON position and check that lights are illuminated. Return switch to the AUTO position and check that tread lights are extinguished.
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