- do a detailed visual inspection of the rudder mechanical control linkage in the vertical stabilizer, (Ref. AMM TASK 27-21-00-210-003) and do the corrective action if necessary.
R - do the check of the rod (6) and its attachment, connect the R rod (6).
 2 If you find a hard spot:
_ R - disconnect the centering spring rod (12) from the bellcrank R (13) and examine the rod, (Ref. AMM TASK 27-21-48-000-001) R - from the rod (6) move the linkage.
 a If you do not find a hard spot:
_ R - replace the centering spring rod (12), (Ref. AMM TASK 27-R 21-48-400-001) and connect the rod (6).
 b If you find a hard spot:
_ R - connect the centering spring rod (12), disconnect the R rods (14) and (15). Make sure that the bellcrank (13) is R correct and connect the rod (14) only.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞27-20-00∞∞∞∞∞∞∞∞∞∞Page 207
 Nov 01/02 CES

R Linkage of the Centering Spring Rod, TLU, Servo Controls Figure 203/TASK 27-20-00-991-003
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞27-20-00∞∞∞∞∞∞∞∞∞∞Page 208
 Nov 01/02 CES

 (c) If the fault continues: - do a mechanical test of the travel limitation unit 
R R  - make sure that the rods (15) and (6) are disconnected - disconnect the rod (16) from the travel limitation unit - manually pull the lever of the travel limitation unit and make sure that the travel limitation unit moves correctly under the centering rod action.
R R  1_ If you find a hard spot: - examine the travel limitation unit and replace it if necessary, (Ref. AMM TASK 27-23-51-000-001) (Ref. AMM TASK 27-23-51-400-001) and connect all the rods (15), (16) and (6).
R R R R R  2_ If you do not find a hard spot: - do a mechanical test of the linkage - make sure that the rods (15), (16) and (6) are disconnected - disconnect the actuating spring rod of the servocontrols (17), (18) and (19) - manually make sure that the linkage bellcranks (20), (21), (22) and rods move easily.
 a_ If you do not find a hard spot: - examine each actuating spring rod and attachment. Do the corrective action if necessary and connect all the items and rods.
 b_ If you find a hard spot: - do a check of the defective items, do the corrective action and connect all the items and rods.
 C. Do the test given in Para.3.

R
R
R
Airframe Vibration due to the Rudder
 1. Possible Causes
_______________
 - rudder servo controls

 - hinge bearings

 - rudder fitting attachments

 - servo control bearings

 - servo control attachments

 - eye-end of servo control

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
05-50-00-810-801  Identification of the Cause of In-Flight Airframe Vibrations and/or Noises
AMM 27-21-41-200-001 Inspection/Check of the Rudder AMM 27-24-00-200-001 Check of the Rudder Servo Controls and Hinge Bearings
 for too much Play and Condition AMM 27-24-00-200-002 Check of the Rudder Trailing Edge Play AMM 27-24-51-000-001 Removal of the Rudder Servo Control
 1025GM/2025GM/3025GM AMM 27-24-51-000-003 Removal of the Rudder Servo Control Eye End AMM 27-24-51-200-001 Check of the Rudder Servo Control Attachments AMM 27-24-51-400-001 Installation of the Rudder Servo Control
 1025GM/2025GM/3025GM AMM 27-24-51-400-003 Installation of the Rudder Servo Control Eye End AMM 27-24-51-960-001 Replacement of the Rudder Servo-Control Bearings
 3. Fault Confirmation
__________________
 A. Test
 Make sure that the identification of the cause of the vibrations is
 correct (Ref. TASK 05-50-00-810-801).

 4. Fault Isolation
_______________

 A. If the source of aiframe vibrations is the rudder:
 - Do a check of the rudder trailing-edge play (Ref. AMM TASK 27-24-00-200-002), refer to the play values recorded and do the applicable steps that follow:
 (1) If the measured play value is more than 16 mm (0.6299 in.) for at least one of the servo controls:
 (a) Do a check of the rudder servo controls and hinge bearings for too much play and condition (Ref. AMM TASK 27-24-00-200-001)
　
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