B. Prepare Ground Spoiler Actuator for Adjustment
(1)
Provide electrical power.
(2)
Provide systems A and B hydraulic power (Ref 27-62-0, M/P).
(3)
Place speed brake control lever in UP position. Check that all spoilers rise.
(4)
Retract trailing edge flaps to full up with jackscrews in contact.
(a)
Place flap control lever in FLAP UP detent.
(b)
Pull inboard on WFFA cable in wheel well until jackscrew stops contact.
(5)
Place speed brake control lever in DOWN position to lower all spoilers.
(6)
Place SPOILER A and B switches in OFF position.
(7)
Check ground spoiler actuator for hydraulic leaks.
C. Adjust Ground Spoiler Actuator
(1)
Check that ground spoiler to flap clearance is per Fig. 501.
(2)
If spoiler to flap clearance is not within limits:
(a) Record spoiler to flap clearance.
500
Feb 20/94 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-62-72 Page 501
A89697
No. 4 and 5 Ground Spoiler Adjustment 500
27-62-72 Figure 501 Oct 20/92
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(b)
Provide access to spoiler actuators by either lowering flaps or by placing speed brake control lever in UP position. Depressurize system A hydraulic power (Ref 27-62-0, M/P).
WARNING: DO NOT PUT ANY PART OF BODY BETWEEN SPOILER AND WING UNLESS HYDRALIC POWER IS REMOVED. SERIOUS INJURY CAN RESULT.
(c)
Break lockwire, loosen checknut and disengage locking key on actuator rod end.
(d)
Turn actuator piston rod to obtain proper spoiler to flap clearance. Each one-sixth turn of the actuator piston rod changes the gap at the trailing edge by 0.093 inch.
CAUTION: DO NOT TURN ACTUATOR PISTON ROD WHEN ACTUATOR IS PRESSURIZED.
(e)
Coat piston rod end threads with corrosion preventive compound.
(f)
Engage locking key with actuator piston rod. Tighten checknut within 100 to 200 pound-inches torque range.
(g)
Provide system A hydraulic power.
(h)
Lower spoilers, if applicable.
(i)
Check that trailing edge gap is within limits.
(j)
Provide access to actuators.
(k)
Tighten actuator piston rod end checknut 290-410 pound-inches.
(l)
Lockwire checknut and locking key.
(m)
Apply a bead of sealant to the rod end checknut.
(3) Test ground spoiler actuator.
500
Feb 20/94 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-62-72 Page 503
2. Ground Spoiler Actuator Test
A. Equipment and Materials
(1)
Control Column Protractor Assembly-4MIT65B80307-1 (Preferred) or F52485-500 (Optional) which is used with the following adapters:
(a)
Aileron Control Wheel Protractor Mount-F72790
(b)
Forward Thrust Lever Protractor Adapter-F72952-2
(2)
Control Surface Protractor Stand Assembly - F71292-17, or equivalent
B. Test Ground Spoiler Actuator
(1)
Provide system A hydraulic power. Refer to 27-62-0.
(2)
Place speed brake control lever in UP position to raise spoilers.
(3)
Using control surface protractor check that ground spoilers No. 4 and 5 are 60 (+ 2) degrees up from the full down position.
(4)
Check that ground spoiler No. 4 is within 2 degrees of ground spoiler No. 5.
(5)
Place speed brake control lever in DOWN position.
C. Return airplane to normal
(1)
Remove system A hydraulic power. Refer to 27-62-0.
(2)
Remove electrical power if no longer required.
(3)
Check hydraulic reservoirs and service if required. Refer to Chapter 12, Hydraulic Servicing.
500
27-62-72 Page 504 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/99
NO. 4 AND 5 GROUND SPOILER ACTUATOR LINKAGE - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Ground Spoiler Ground Lock - F80040-( )
NOTE: F80040-15 is used on airplanes having ground roll spoilers with single actuators. F80040-2 is used on airplanes having ground roll spoilers with double actuators.
B. Grease - BMS 3-24 (AMM 20-30-21/201)
2. Prepare Ground Spoiler Actuator Linkage for Removal
A. Provide electrical power.
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