(a)
Move the control column fully forward.
(b)
Make sure the elevator moves freely while it moves to the full down position.
(c)
Move the control column fully aft.
(d)
Make sure the elevator moves freely while it moves to the full up position.
S 864-049
(12)
Set the STAB TRIM 2 and 3 switches to ON.
S 864-050
(13)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P7, Overhead Circuit Breaker Panel
1) 7E7, STAB TRIM L S/O VLV
2) 7E20, STAB TRIM R S/O VLV
S 864-051
(14)
Release the pressure from the hydraulic system if it is not necessary (AMM 29-11-00/201).
S 864-052
(15)
Remove external power from the AC buses if it is not necessary (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
ELEVATOR HINGE - INSPECTON/CHECK
________________________________
1. General
A. This subject has one task. The task is an inspection of the elevator hinges. The procedure has these parts:
(1)
The removal of the hinge bolt
(2)
An inspection of the elevator hinge components
(3)
The installation of the hinge bolt.
B.
If two or more hinges require the inspection, you must inspect them one at a time.
TASK 27-31-03-206-001
2. Elevator Hinge Inspection_________________________
A. Standard Tools and Equipment
(1)
Micrometer - 0-1 inch, 1-2 inch, and 2-3 inch
(2)
Vernier Calipier
B.
References
(1)
27-31-03/401, Elevator Hinges
C.
Access
(1)
Location Zone
335 Elevator Inboard, LH
345 Elevator Inboard, RH
336 Elevator Outboard, LH
346 Elevator Outboard, RH
D.
Procedure
S 036-002
(1)
Do this task: "Nonreaction Hinge Removal" or "Reaction Hinge Removal" (Ref 27-31-03/401).
S 226-003
(2)
Measure the parts for worn areas:
(a)
Remove the parts.
(b)
Use a micrometer or a vernier caliper to measure the parts.
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747-400 MAINTENANCE MANUAL
(c)
Compare the dimensions you measured with the permitted dimensions in Fig. 601.
(d)
Replace the parts that are not in the tolerance.
(e)
Install the parts.
S 436-004
(3) Do this task: "Nonreaction Hinge Installation" or "Reaction Hinge Installation" (Ref 27-31-03/401).
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747-400
MAINTENANCE MANUAL
NOTE:____ THE LEFT ELEVATOR IS SHOWN;
THE RIGHT SIDE IS OPPOSITE.
Elevator Hinges Wear Limits
Figure 601 (Sheet 1)
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