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(b)
(c)
(d)
(e)
(f)
(g)
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747-400 MAINTENANCE MANUAL
2) Examine the fin attach fittings.
3) Examine the horizontal stabilizer center section.
4) Examine the stabilizer hinge fittings.
5) Examine the diagonal braces and hinge support structure at
body station 2598. 6) Examine the mount fittings and support structure of the
stabilizer jackscrew mechanism. 7) Operate the stabilizer trim through the full range. 8) Make sure the jackscrew and hinges move freely.Examine the external surfaces of the horizontal stabilizer.
NOTE: Make sure you look at the skin splices.
____
1) Examine the support towers for the balance weights on the outboard elevator.
2) If external damage is found, do the steps that follow: a) Examine the spars. b) Examine all of the internal primary structure you can
get access to.Examine the rear spar webs of the horizontal stabilizer.Examine the external surfaces of the elevator. 1) If external damage is found, examine the front spar web of
the elevator.Examine the vertical stabilizer and rudders.
NOTE: Do the same procedures for the horizontal stabilizer and
____ elevators.
Examine the rear spar webs of the vertical stabilizer.
If you find damage in the last 6 steps (starting at the step "
Do the Inspections that Follow:") do the steps that follow:
1) Examine all elevator hinge bearings and actuator bearings.
NOTE: A recommended procedure is in the section "Examine
____ Airplane Structure After Stall (Beyond Initial Buffet or Stick Shaker)".
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2) Examine the rudder hinge bearings and and actuator bearings.
S 712-058
(9) Make sure the flight controls move freely.
(a) If unusual conditions are found, do a check of all flight controls for force specifications and cable tensions.
NOTE: If it is necessary, refer to the applicable sections
____
that follow.
1) AMM 27-11-00/501, Aileron and Aileron Trim Control System 2) AMM 27-21-00/501, Rudder and Rudder Trim Control System 3) AMM 27-31-00/501, Elevator Control System 4) AMM 27-51-00/501, Trailing Edge Flap System 5) AMM 27-61-00/501, Spoiler Control System 6) AMM 27-81-00/501, Leading Edge Flap System
S 212-090
(10) Examine the Nacelles and Nacelle-Strut components that follow:
NOTE: Do a general visual inspection for obvious damage.
____
(a)
Midspar attachment area:
-strut midspar fitting
-under wing fittings
(b)
Diagonal brace area:
-diagonal brace assembly
-strut attach fitting
-wing attach fitting
(c)
If any damage is found in any of the previous steps, do the next following step. If no damage is found in the previous steps, you can skip the next following step. However, If unusual conditions are found, do the inspections of the step that follows.
NOTE: Also do the inspection if severe turbulence occurs with
____ large variations in airplane roll and yaw attitude.
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S 212-078
(11) Examine the Strut Area
(a) Open the trailing edge fairing doors and remove the strut access panels (AMM 06-09-09/201). 1) Examine the components that follow:
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