500 Forward Airstair Drain Pan Access
Aug 15/72 Figure 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-61-121 Page 405
FORWARD AIRSTAIR CARRIAGE STEP ACTUATING MECHANISM -ADJUSTMENT/TEST
EFFECTIVITY
Standard Passenger Airplanes
1. Forward Airstair Carriage Step Actuating Mechanism Adjustment
A. Equipment and Materials
(1) Rigging pin -0.2480 +0.0005/-0.0010-inch diameter by 2.50 inches long
NOTE: Rigging pin is part of F70207-61.
B. Prepare for Adjustment
(1) Remove Drain Pan (if installed)
(a) Extend airstair to provide clearance for removing drain pan attachment fasteners (Fig. 502).
WARNING: DO NOT OPERATE THE AIRSTAIR WHEN THESE CONDITIONS OCCUR:
-YOU WILL OPERATE THE AIRSTAIR MORE THAN 3 CYCLES IN 20
MINUTES -THE WIND IS MORE THAN 40 KNOTS -THERE IS NO SUPPORT UNDER THE END OF THE AIRSTAIR
WHEN THE AIRPLANE IS ON JACKS -THE FORWARD ENTRY DOOR IS OPENED FULLY -THE AREA IS NOT CLEAR OF PEOPLE OR EQUIPMENT.
IF YOU OPERATE THE AIRSTAIR WHEN THESE CONDITIONS OCCUR, YOU CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
NOTE: Temporary access can be attained by partially retracting airstair.
(b)
Gain access to drain pan through electronic compartment access door.
(c)
Remove hose clamp and drain hose from access hatch in drip pan. Remove access hatch.
(d)
Obtain access to drip pan attachment fasteners through access hatch. Remove fasteners.
CAUTION: DO NOT ATTEMPT TO MOVE SWING ARM OUT OF WAY OR USE SWING ARM AS HANDHOLD OR SWING ARM MAY BE DAMAGED.
(e)
Retract airstair and release control before airstair door begins to close. Remove drip pan through airstair - airstair door opening on side of fuselage.
5C8
Feb 20/92 52-61-131 Page 501
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Forward Airstair Carriage Step Actuating Mechanism Adjustment 500
52-61-131 Figure 501 (Sheet 1) Feb 15/68
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Forward Airstair Carriage Step Actuating Mechanism Adjustment
May 15/68 Figure 501 (Sheet 2) 52-61-131
Page 503
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Forward Airstair Drain Pan Removal 500
52-61-131Page 504 Figure 502 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/72
(2)
Open airstair circuit breakers on panel P6. Disconnect airstair electrical connector (3) (Fig. 501).
(3)
Disengage carriage drive pinions by moving carriage pinion disconnect lever (2) to unlocked position.
(4)
Manually move carriage outboard to fully extended position against stop.
(5)
Loosen jamnuts (14) securing forward and aft stops (13) and screw both stops down several turns to clear fittings (8).
C. Adjust Carriage Step Actuating Mechanism
(1)
Adjust forward and aft rods (9) to a length allowing 0.0 to 0.1-inch inboard overtravel of fittings (8). Tighten jamnuts (11) and lock in place by bending tabs of washer (12) over flats of nut.
NOTE: Nominal length of actuating rod should be 18.12 ± 0.06 inches between centers of bolt holes in rod ends.
(2)
Adjust forward and aft stops (13) so that upper surface of stops contact lower surface of fittings (8) and secure with jamnuts (14).
(3)
Test actuating mechanism in accordance with par. 2.C.
D. Restore Airplane to Normal
(1)
Manually move carriage to retracted position and insert rig pin through retract index slot
(6) and into retract index hole in aft beam of carriage. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737 AMM 飞机维护手册 舱门 DOORS(153)
