(2)
Removal/Installation Tool, Elevator Control
Decentering Springs - B27060-1
B.
References
(1)
06-42-00/201, Empennage Access Doors and Panels
(2)
24-22-00/201, Electrical Power - Control
(3)
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
C.
Access
(1)
Location Zones 211/212 Control Cabin 311/312 Area Aft of Pressure Bulkhead to BS 1787.45 313/314 Stabilizer Center Section Compartment
(2)
Access Panels
311AL Forward Stabilizer Compartment
313AL Elevator Feel Unit
D.
Prepare for the Removal
(1)
Supply electrical power (Ref 24-22-00).
S 862-002
S 012-003
WARNING: STAY OFF THE SERVICE ACCESS DOOR, 311AL AND THE ELEVATOR
_______ CONTROL ACCESS DOOR, 313AL. YOUR WEIGHT CAN RELEASE THE SPRING-LOADED LATCHES ON THE DOOR. IF YOU FALL THROUGH THE DOOR, INJURIES CAN OCCUR.
(2) Open the access door for the forward stabilizer compartment, 311AL (Ref 06-42-00).
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S 862-004
WARNING:_______ KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER,
FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED
SURFACES. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR
WHEN HYDRAULIC POWER IS SUPPLIED.
(3)
Pressurize the right and center hydraulic systems (Ref 29-11-00).
S 862-005
(4)
Move the horizontal stabilizer until Dimension B on the stabilizer ballscrew actuator is 15.89 | 0.01 inches
(403.6 +/- 0.25 mm) (Fig. 201).
S 862-006
(5)
Remove the pressure from the right and center hydraulic systems (Ref 29-11-00).
S 862-007
(6)
Put the L, R, and C FLT CONTROL SHUTOFF switches on the right side panel, P61, to the OFF position.
S 862-008
(7)
Put the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the control stand panel, P10, to the CUTOUT position.
S 862-009
(8)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a)
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; 11B19, STAB TRIM ALT
(b)
11C12, STAB TRIM SHUTOFF LEFT
(c)
11C13, STAB TRIM SHUTOFF RIGHT
(d)
11H11 or 11C05, STAB TRIM CONT L
(e)
11H17, FLT CONT SHUTOFF TAIL LEFT
(f)
11H18, FLT CONT SHUTOFF TAIL CTR
(g)
11H20, STAB TRIM CONT R
(h)
11H28, FLT CONT SHUTOFF TAIL RIGHT
(9)
Open the access door for the feel unit, 313AL (Ref 06-42-00).
S 012-010
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MAINTENANCE MANUAL
15.89 |0.01 INCHES (403.60 |0.25 mm), DO THE STEPS THAT FOLLOW:
1.
PUT THE GAGE ASSEMBLY AGAINST THE BALLSCREW SO THAT THE BOLT HEADS ARE ON THE SHOULDERS OF THE UPPER AND LOWER STOPS
2.
MAKE SURE THAT THE FEELER BLADE CAN BE PUT BETWEEN THE BOLT HEAD OF THE GAGE ASSEMBLY AND ON THE SHOULDER OF THE UPPER STOP (THIS WILL PREVENT PRELOADING)
Measurement of Stabilizer Dimension B
Figure 201
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