(n)  
Turn the aft end of the support beam inboard until it is clear of the ceiling panel.

 (o)  
Lower the aft end of the support beam. At the same time, move it aft and inboard until its forward end is clear of the ceiling panels.

 (p)  
Remove the screws that attach the retainer plate (for the upper bearing) to the jackshaft and remove the retainer plate.

 (q)  
Remove the screws that attach the retainer plate (for the lower bearing) to the jackshaft. 1) Remove the retainer plate and the support beam.

 TASK 27-21-06-404-013
 3.  Rudder Forward Quadrant Installation (Fig. 401)____________________________________
 A. Special Tools and Equipment
 (1)  
G12001-50 Rig Pin Kit

 B.
Consumable Materials

 (1)  
D00633 Grease - BMS 3-33 (Preffered).

 (2)  
D00013 Grease - MIL-G-23827 (Optional).

 (3)  
C00174 Corrosion Preventive Compound - MIL-C-16173, Grade 2

 C.
References

 (1)  
24-22-00/201, Manual Control

 (2)  
27-08-02/401, Rudder Pedal Position Transmitter

 (3)  
27-21-06/601, Rudder Forward Quadrant

 (4)  
32-50-00/201, Steering

 (5)  
IPC 27-21-06 Fig. 5

 D.
Access

 (1)  
Location Zone 211 Passenger Cabin-Nose to First Door, LH 212 Passenger Cabin-Nose to First Door, RH 324 Vertical Stabilizer, Rear Spar to Trailing Edge

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-21-06
 ALL  ú ú 01 Page 405 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (2)  
Access Panel
 324FL Access Panel

 E.
Prepare for the Installation

 S 494-014
 WARNING:_______MAKE SURE THE NOSE LANDING GEAR IS POINTED FORWARD. IF THE TIRES ARE NOT PARALLEL WITH THE AIRPLANE, THEY CAN TURN QUICKLY WHEN YOU REMOVE THE RIG PIN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Install the rig pin in the steering metering valve for the nose landing gear (Ref 32-50-00/201).

 S 224-015

 (2)  
Make sure the rudder forward quadrant is not worn too much
 (Ref 27-21-06/601).

 S 434-016

 (3)  
Install the upper bearing housing and the bearing on the jackshaft (Section A-A, Fig. 401).

 S 434-017

 (4)  
Install the retainer plate for the upper bearing on the jackshaft and attach it with the screws.

 (a)  
Install lockwire on the screws.

 S 434-018
 (5)  
Install the support beam, the bearing housing, and the bearing on the jackshaft.

 S 414-044

 (6)  
Install the retainer plate for the lower bearing on the jackshaft and attach it with the screws.

 (a)  
Install lockwire on the screws.

 S 014-019
 (7)  
Open the 324FL access panel.

 F.
Procedure

 (1)
Put the rudder forward quadrant in its position in the airplane.

 S 844-045
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-21-06
 ALL  ú ú 01 Page 406 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 414-047

 (2)  Install the bolts that attach the upper bearing housing to the upper
 support structure.
 S 414-048
 (3)  Install the bolts for the support beam for the lower bearing.
 S 414-049
 (4)  Install the drip shield panel, inboard of the rudder forward
 quadrant.
 S 434-050
 (5)  Connect the ceiling support clip to the support beam and to the
 support tee.
 NOTE:____ If the ceiling support clip was initially connected to the
 support tee with rivets, you can use 3/16-inch bolts.
　
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