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D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
TASK 27-62-34-400-801
3. Speed Brake Armed Switch and Speed Brake Handle Position Switch Installation
(Figure 401)
A. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
211 Flight Compartment - Left
212 Flight Compartment - Right
B. Switch Installation
SUBTASK 27-62-34-420-001
(1) Install the speed brake armed switch [1] and the speed brake handle position switch [6]:
(a) Put the speed brake armed switch [1] and the speed brake handle position switch [6] in
position.
(b) Install the bolts [3], washers [4] and nuts [5].
(c) Attach the electrical leads [2].
SUBTASK 27-62-34-860-003
(2) Remove the safety tag and close this circuit breaker:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 9 C00440 FLIGHT CONTROL AUTO SPEED BRAKE
SUBTASK 27-62-34-820-001
(3) Do this task: Speed Brake Armed Switch and Speed Brake Handle Position Switch
Adjustment, TASK 27-62-34-400-802.
------------------------- END OF TASK ---------------------------
TASK 27-62-34-400-802
4. Speed Brake Armed Switch and Speed Brake Handle Position Switch Adjustment
(Figure 401)
A. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
27-62-00-800-801 Speed Brake Hydraulic Systems A and B Pressurization (P/B 201)
B. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
211 Flight Compartment - Left
212 Flight Compartment - Right
C. Access Panels
Number Name/Location
112A Forward Access Door
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-62-34
Page 405
Oct 10/2003
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
D. Switch Adjustment
SUBTASK 27-62-34-820-002
(1) Adjust the speed brake armed switch [1]:
(a) Move the speed brake lever to the DOWN position.
(b) Move the speed brake lever to the FLIGHT DETENT position.
(c) Loosen the nuts [5].
(d) Move the speed brake lever forward until the aft surface of the detent pin is 0.20 +/-0.02
inches (5.08 +/-0.51 millimeters) from the aft edge of the DOWN detent.
CAUTION: DO NOT BEND THE SWITCH LEVER. TO ADJUST THE SWITCH LOOSEN THE
ATTACHING BOLTS UNTIL THE SWITCH TURNS FREELY.
(e) Adjust the switch until there is continuity between the common and normally open
terminals.
NOTE: Always adjust the switch from the no continuity position to the continuity position.
SUBTASK 27-62-34-820-003
(2) Adjust the speed brake handle position switch [6]:
(a) Move the speed brake lever to the ARMED DETENT position.
(b) Slowly move the speed brake lever aft 0.25 +0.05/-0.00 inches (6.35 +1.27/-0.00
millimeters).
CAUTION: DO NOT BEND THE SWITCH LEVER. TO ADJUST THE SWITCH LOOSEN THE
ATTACHING BOLTS UNTIL THE SWITCH TURNS FREELY.
(c) Adjust the switch until the switch actuates and there is continuity between the common and
normally open terminals.
NOTE: Always adjust the switch from the no continuity position to the continuity position.
CAUTION: DO NOT TIGHTEN THE NUTS TOO MUCH.
(d) Tighten the nuts [5].
SUBTASK 27-62-34-010-002
(3) Close this access panel:
Number Name/Location
112A Forward Access Door
E. Do a test of the switches:
SUBTASK 27-62-34-860-004
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-62-34-860-005
(2) Do this task: Speed Brake Hydraulic Systems A and B Pressurization,
TASK 27-62-00-800-801.
SUBTASK 27-62-34-860-006
(3) Put the No. 1 and 2 thrust levers in the idle position.
SUBTASK 27-62-34-860-007
(4) Make sure the ground spoilers are in the fully down position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-62-34
Page 406
Feb 10/2004
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-62-34-700-001
WARNING: MAKE SURE THE SPEED BRAKE ARMED LIGHT IS ON WHEN YOU LIFT THE SPEED
BRAKES WITH THE SPEED BRAKE LEVER. THE SPEED BRAKES CAN
AUTOMATICALLY RETRACT. THIS CAN CAUSE INJURY TO PERSONS.
(5) Do a test of the switch:
NOTE: The SPEED BRAKE DO NOT ARM light will be off during this test.
(a) Make sure the speed brake lever is in the DOWN position.
WARNING: MAKE SURE THAT YOU OPEN THE CIRCUIT BREAKER FOR THE WEATHER
RADAR SYSTEM. THE FORWARD MOVEMENT OF A THRUST LEVER CAN CAUSE
THE AUTOMATIC OPERATION OF THE SYSTEM. THE OPERATION OF THIS
SYSTEM CAN CAUSE SERIOUS INJURY TO PERSONS AND DAMAGE TO
　
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