(1)
Location Zone 221-222 Control Cabin 315-316 Area Aft of Stabilizer Compartment 334 Horizontal Stabilizer Rear Spar to Trailing Edge, LH 335 Inboard Elevator, LH 336 Outboard Elevator, LH 344 Horizontal Stabilizer Rear Spar to Trailing Edge, RH 345 Inboard Elevator, RH 346 Outboard Elevator, RH
(2)
Access Panel
312A Horizontal Stabilizer Jackscrew Access Door
315A Access Door
F.
Prepare for Adjustment
(1)
Open the access doors 312A and 315A (Ref 06-09-05/201).
S 015-016
(2)
Open the applicable ceiling panels:
(a)
Open the middle panel in the second row forward of No. 1 doors to get access to the elevator forward controls.
S 015-014
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A
747-400
MAINTENANCE MANUAL
E2A
TURNBUCKLES
E2B ABOVE THE CEILING
IN THE PASSENGER
CABIN
THE CAPTAIN'S
E1B CONTROL COLUMN
SEE C CONTROL ROD ATTACHMENT
E1A (2 LOCATIONS)
SEE A
RIG
PIN E-1
TENSION REGULATOR INDICATING SCALE SEE B TENSION REGULATOR
A
ELEVATOR STOPS
B C
Elevator Body Controls Adjustment Figure 501 (Sheet 1)
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747-400 MAINTENANCE MANUAL ELEVATOR AUTOPILOT SERVO MODULE (3 LOCATIONS)
SEE D ELEVATOR FEEL UNIT
E2B E2A
E1A E1B ELEVATOR AFT QUADRANT SEE E
RIG PIN E-2
1.15 INCHES MAX D
1.52 INCHES MAX
CHECKNUT
CHECKNUT
SLEEVE
E
Elevator Body Controls Adjustment Figure 501 (Sheet 2)
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747-400 MAINTENANCE MANUAL
(b) Open these panels to get access to the body cable turnbuckles:
NOTE: Adjust these turnbuckles only if the turnbuckle
____ adjustment is not sufficient on the turnbuckles aft of the pressure bulkhead.
1) The inboard panel in the third row aft of the No. 2 doors. 2) The panel in the third row aft of the No. 3 doors.
S 015-088
(3)
If it is necessary to adjust the input rod end; remove these access panels: (Ref 06-09-06/201):
(a)
Panels 334AT and 344AT for access to the input rod end of the inboard elevator PCP.
(b)
Panels 334LB and 344LB for access to the input rod end of the outboard elevator PCP.
G.
Adjust the Elevator Feel Unit
S 865-089
(1)
Do this task: "Supply Electrical Power" (Ref 24-22-00/201).
S 865-090
(2)
Set all the FLT CONTROL HYD POWER TAIL switches on the P461 Pilots' Overhead Maintenance Panel to SHUTOFF.
S 865-091
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P180 DC Power Distribution Panel
1) 180E7 ELEV/RUD VLV SYS 2
2) 180H23 ELEV/RUD VLV SYS 3
(4)
Set the STAB TRIM 2 and 3 on the control stand to CUTOUT.
S 835-093
(5)
Do a check of the elevator feel unit:
(a)
Let the feel unit detent adjust the elevator control system.
S 865-092
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