B. Trammel Bar - F80055-1
C. Grease - MIL-G-23827 (Ref 20-30-21)
D. Drill bits - 0.187/0.190-0.263/0.266
E. Drill centering guide
F. Lockbolt installation tool
3. Prepare for Removal
A. Remove elevator system A and B hydraulic power (Ref 27-31-0 MP).
B. Open aft compartment access door 3701 (Ref 12-31-41).
C. If it is necessary, remove tail cone from airplane (Ref 53-53-0 R/I).
NOTE: Removal of the tail cone is not necessary, but gives better access for the removal of the torque tube.
D. Set horizontal stabilizer at 3 units of trim.
E. Install rigging pin E-5 in aft control quadrant (Fig. 401).
F. Remove locking clips and loosen turnbuckles for elevator cables EAL, EBL, EAR, and EBR.
4. Remove Input Torque Tube
A. Remove EAL, EBL, EAR, and EBR control cables (5) from quadrants on input torque tube. Install clamps on cables to prevent cables going through bulkhead.
B. Disconnect power control input rods (10) for left and right power control units at lower rod ends.
C. Disconnect feel and centering unit output rod (1) at lower rod end.
D. Using drill bit 0.187/0.190 and drill centering guide, drill out four BACB30GW lockbolts (11) securing center bearing retainer ring (after drilling knock out with punch).
NOTE: Use care to ensure holes are not elongated.
Jun 20/91 27-31-71 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
G43174G42358
Elevator Input Torque Tube Installation 551
27-31-71 Figure 401 (Sheet 1) Jun 20/90
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Elevator Input Torque Tube Installation
Jun 20/90 Figure 401 (Sheet 2) 27-31-71
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
E. Remove rig pin E-5.
F. Remove four bolts from left and right side plate (9) assemblies. Remove and secure bushings.
NOTE: This will leave lower mount of power control units (7) and reaction links (8) loose.
G. Remove input torque tube from airplane.
H. If attached, remove/retain counter weights from lever (14).
NOTE: Further disassembly of aft input torque tube should be accomplished in accordance with component maintenance manual.
5. Prepare for Installation
A. Remove elevator system A and B hydraulic power (Ref 27-31-0 MP).
B. Check that horizontal stabilizer is set at 3 units of trim.
C. Apply grease to entire shank of all bolts.
6. Install Input Torque Tube
A. Position and support input torque tube by installing second bolt from forward end in left and right side plate assemblies.
(1) If applicable, install retained weights on lever (14).
CAUTION: POWER UNIT INPUT RODS, CLEVIS BOLTS, AND ROD END BOLTS ARE DUAL LOAD PATH COMPONENTS. INSPECT INNER AND OUTER RODS/BOLTS FOR DAMAGE PRIOR TO INSTALLATION.
B. Install remaining 3 mount bolts in side plates. Ensure bushings are installed in 1st, 3rd and 4th bolts from forward end and lower mount for power control units (7) and reaction links (8) are picked up by 3rd and 4th bolts.
NOTE: Forward side plate bolts installed with heads inboard on left and right side. All other side plate bolts installed with boltheads outboard on right side and inboard on left side.
C. Tighten side plate aft bolt nut 550 to 600 pound-inches. Tighten run on nut 225 to 250 pound-inches.
D. Tighten side plate forward bolt nut 90 to 105 pound-inches. Tighten run on nut 30 to 35 pound-inches.
E. Over size the 4, holes in the center bearing retainer ring from 0.247/0.250 to 0.263/0.266. Use drill centering guide adapter to ensure holes are nut elongated.
F. Secure retaining ring to bracket with BACB30CU8-8 lockbolts or BACB30FP8-8 hi-lock fasteners.
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