(c)
OHME65B80713-8, and -9, Support Bracket
(d)
OHME65B80713-11, Spreader Bar
(2)
G27036-46, Measurement Equipment - Horizontal Stab Hinge Bearing Free Play (which is referred to as the "check tool") (Preferred)
(3)
6MIT65B03670, Measurement Equipment - Horizontal Stab Hinge Bearing Free Play (which is referred to as the "check tool") (Optional)
(4)
G27036-47, Adapter (Required to use with 6MIT65B03670)
(5)
G27030-1, Torque AdapterStandard Tools and Equipment
(1)
Dial Indicator
(2)
Torque Wrench, 1/2" drive, 0-50 lb-ft (0-68 newton-meters)
(3)
Pad - 10 inches x 10 inches (254 x 254 millimeters) cushioned with rubber and capable of distributing load to stabilizer rear spar and rib structure (which is used in free play check without check tool for the left and right stabilizer hinge)
(4)
Jacking apparatus capable of reaching underside of horizontal stabilizer and means of measuring applied loads (which is used in free play check without check tool for the left and right stabilizer hinge)
NOTE: The pad and the jacking apparatus are required to check
____ stabilizer hinge free play only if the check tool is not available.
References
(1)
AMM 06-09-05/201, Body Section 48 Access Doors and Panels
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 27-41-00/201, Horizontal Stabilizer Trim Control System
(4)
AMM 27-41-06/601, Stabilizer Trim Drive Mechanism
(5)
AMM 28-26-00/201, Defueling
(6)
AMM 29-11-00/201, Main Hydraulic Supply System
(7)
OHM 55-10-01Access
(1) Location Zon 311-312 315-316 eArea Aft of Pressure BulkheadArea Aft of Stabilizer Box
(2) Access Panel 312A 315A Horizontal Stabilizer Jackscrew Access DoorAccess Door
Prepare for the Free Play Check
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A
747-400 MAINTENANCE MANUAL
S 866-029
WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE
STABILIZER AND ELEVATOR SURFACES BEFORE YOU MOVE THE
STABILIZER. THE STABILIZERS AND THE ELEVATORS CAN MOVE QUICKLY
AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Set the stabilizer at neutral rig position (AMM 27-41-00/201).
S 656-030
(2)
Defuel the horizontal stabilizer fuel tank (AMM 28-26-00/201).
S 866-032
(3)
Do this task to depressurize the hydraulic system No. 2 and No. 3: "Remove Hydraulic Power" (AMM 29-11-00/201).
S 866-033
(4)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 866-034
(5)
Set the STAB TRIM 2 and 3 switches to CUTOUT.
S 866-035
(6)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel 1) 7E7, L STAB TRIM S/O VLV 2) 7E20, R STAB TRIM S/O VLV
S 866-036
(7)
If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
S 016-037
(8)
Open the 312A and 315A access doors (AMM 06-09-05/201).
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A
747-400 MAINTENANCE MANUAL
S 866-061
(9)
Remove the spray shields from the center section of the horizontal stabilizer.
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