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747-400 MAINTENANCE MANUAL
S 212-072
(4) Do the steps that follow to find possible damage:
(a)
Examine the internal structure in the fuselage at body station 2598 bulkhead that you can get access to.
(b)
Look at the areas that follow: 1) The fuselage bulkheads at body station 2598 2) The center section of the horizontal stabilizer 3) The stabilizer hinge fittings 4) The diagonal braces and hinge support structure at body
station 2598.
(c)
Examine the elevator external surfaces.
(d)
Examine the elevator front spar in the area of the actuators.
(e)
Examine the support towers for the balance weights in the outboard elevator.
(f)
Examine the rear spar web of the horizontal stabilizer, immediately outboard of the hinge fittings.
(g)
Make sure the flight controls move freely.
1) If unusual conditions are found, make a check of all force specifications for the flight controls and the cable tensions.
NOTE: If it is necessary, refer to the applicable sections
____
that follow.
a) AMM 27-11-00/501, Aileron and Aileron Trim Control
System b) AMM 27-21-00/501, Rudder and Rudder Trim Control System c) AMM 27-31-00/501, Elevator Control System d) AMM 27-51-00/501, Trailing Edge Flap System e) AMM 27-61-00/501, Spoiler Control System f) AMM 27-81-00/501, Leading Edge Flap System
S 212-073
(5) If damage is found, do the inspections that follow:
(a)
Examine the fuselage bulkheads at body stations 2360, 2484, and 2658.
(b)
Examine the external surfaces of the horizontal stabilizer. 1) Make sure you look at the skin splices.
(c)
Examine the horizontal stabilizer spars and all the adjacent internal primary structure in the areas you can get access to.
(d)
Use the recommended procedure that follows to examine all elevator hinge bearings and actuator bearings: 1) Remove the actuator pin to disconnect the actuator from the
elevator.
NOTE: You must hold the elevator during these steps.
____
2) Examine the actuator pin. 3) Examine the actuator bearing. a) The bearing must turn and pivot in the housing freely.
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747-400 MAINTENANCE MANUAL
4) Move the elevator up and down by hand. a) The elevator must pivot freely.
NOTE: Listen for unusual sounds at each hinge bearing.
____
b) If the elevator does not pivot freely, remove the unsatisfactory hinge pin and examine the pin and hinge bearing.
c) Replace the pin or the bearing if it is necessary. 5) Install the actuator pin(s).
E. Cabin Inspections
S 212-080
(1)
Do a visual inspection of all ceiling panels for dislodging and evi dence do to impact damage.
S 212-082
(2)
Do a visual inspection of all ceiling overhead bins for evidence of looseness and impact damage.
S 212-083
(3)
Do a detailed visual inspection of all ceiling panels equipped with video monitors.
(a) Inspect latches, stops, potting inserts and all fasteners.
S 212-081
(4) Continue the following inspection if any cabin damage was found in the above Cabin Inspection including the ceiling panels, central overhead bins, or the video monitors. If no damage was found, no further cabin inspection is required and it is not necessary to continue this Cabin Inspection.
(a)
If ceiling panels without video monitors are found dislodged or damaged: Check for proper latching and installation. Repair as necessary.
(b) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 限制/维护检查(9)
