S 022-031
 (3)  Remove the remaining part of the shear pin from the bearing rod end and bushing in the ratio-changer output crank.
 NOTE: Keep the cupped shape washer to use during the shear pin
____
 installation.

 TASK 27-21-12-422-032
 3. Install Rudder Ratio-Changer Mechanism
______________________________________
 A. General
 (1)  This task contains two procedures, one to install the rudder ratio-changer mechanism, and one to install the ratio-changer shear pin. Because this task contains two procedures, only the applicable group of steps must be done.
 To start one of these procedures, do the group of steps that is necessary to install the component. Then, do the "Put the Airplane Back to Its Usual Condition" steps.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-21-12
 ALL  ú ú 03 Page 208 ú Jun 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

0.000-0.010 INCH (0.000-0.254 mm)

RIGHT RATIO CHANGER
OUTPUT CRANK
(SHEAR PIN)

B-B
RATIO CHANGER OUTPUT CRANK
B
RIVET
SHEAR PIN
RETAINER
CUPPED WASHER
LAMINATED
SHIM

90` (REF)
SHEAR PIN
INSPECTION

0.062-0.065 INCH
HOLE (1.58-1.65 mm)
RATIO CHANGER
0.002-0.005 INCH GAP OUTPUT CRANK
(0.06-0.12 mm) RATIO CHANGER
RATIO CHANGER OUTPUT CRANK
OUTPUT CRANK BUSHING
A-A
Rudder Ratio Changer Shear Pin Repair
Figure 204

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-21-12
 ALL  ú
 ú  01  Page 209
 ú  Jan 28/02 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (2)  
You will have to use washers (AN960KD616L) to adjust the clearance between the ratio-changer mechanism and the left ratio-changer bracket.

 B.
Equipment

 (1)  
Rig Pins from Set B20003-XX (Ref 20-10-24):

 (a)  
R7 - P/N B20003-13

 (b)  
R9 - P/N B20003-54

 (2)  
Handle - Output Arm (optional) - B27045-5

 (3)  
Shear Pin Swaging Tool - B27046-6

 C.
Consumable Materials

 (1)  
C00308 Compound, Corrosion Preventive -MIL-C-11796, Class III

 (2)  
A00247 Sealant, Chromate Type BMS 5-95

 (3)  
A00181 Adhesive, Epoxy - BMS 5-92, Type I

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-21-12
 ALL  ú ú 02 Page 210 ú Jun 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 D. Parts
 (1)  Refer to the IPC for the part numbers and the effectivities of the items in the tables below:
 ~.............................................................................. | AMM | | AIPC | .................. .......................... | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 1 | Ratio Changer Actuator | 27-21-12| 01 | 400 | | | 2 | Control Rod | | | 120 | | | 4 | Shear Pin | | | 117 | | | 7 | LVDT | | | 255 | | | 8 | Pogo | | | 125 | | | 9 | Bolt | | | 10 | | | 10 | Bushing | | | 95 | | | 11 | Washer | | | 35 | | | 12 | Nut | | | 60 | | | 13 | Ratio Changer Mechanism | | | 215 | | | 14 | Washer | | | 40 | | | 15 | Nut | | | 65 | | | 16 | Actuator Mount | | | 115 | | | 17 | Shim | | | 85 | | | 18 | Washer | 27-21-06| 01 | 75 | | | 19 | Bolt | | | 10 | | | 22 | Nut | | | 115 | | | 23 | Bushing | | | 140 | | | 25 | Washer | 27-21-12| 01 | 47 | | | 26 | Bolt Assembly | | |20,25 | | | 27 | Bushing | | | 100 | | | 28 | Nut | | | 70 | | | 30 | Nut | | | 75 | | | 33 | Bushing | | | 105 | | | 34 | Screw | | | 225 | | | 35 | Bushing | | | 240 | | | 36 | Washer | | | 230 | | | 37 | Nut | | | 235 | | | 38 | Bearing | | | 110 | | | 39 | Washer | | | 50 | | | 40 | Washer | | | 55 | 2......….........…....................................…..........….....….......1
　
中國航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 飛行操縱 FLIGHT CONTROLS 2(55)