Drum and Brake Assembly Installation 500
76-11-91 Figure 401 May 15/77
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
J. Support clutch assembly; slide clutch shaft (4) inboard until shaft is removed and remove drum and brake assembly.
CAUTION: SHAFT SUPPORT BEARING MAY SLIDE OUT WITH SHAFT. TAKE CARE THAT BEARING IS NOT DAMAGED.
K. Tag drum and brake assemblies No. 1 and No. 2 respectively.
NOTE: Drum and brake assemblies are not interchangeable.
3. Install Drum and Brake Assembly
A. Clamp control stand thrust lever in IDLE position.
B. Apply a light film of grease to drum and brake assembly spline and shaft (4) (Fig. 401).
C. Position drum and brake assembly between assembly supports and instal1 shaft (8) until inboard end of shaft is seated against support bearing.
D. Position cables on input and output drums of drum and brake assembly and install new cotter pins (3). Remove identification tags from cables.
E. Install cable guard rods (5) with washers and cotter pins.
F. Install locking arm (2) with washers and nut (7), shim (6) and spacer (1).
G. Remove shim (6) laminations as required to limit the gap between locking arm and shim before clamp-up to 0.020 inch.
H. Install washer, nut and cotter pin (8). Nut shall be tightened only finger-tight.
I. Tighten all thrust control cables by adjusting turnbuckles at leading edge station 183 and 155 and body station 303. Adjust and test control cables (Ref 76-11-00, Adjustment/Test).
J. Install cable turnbuckle clips (Ref 20-10-81, Standard Practices).
K. Remove clamp from control stand thrust lever.
L. Remove leading edge flap locks and close flaps (Ref Chapter 27, Leading Edge Flaps and Slats - Maintenance Practices).
500
Jun 20/83 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 76-11-91 Page 403
DRUM AND BRAKE ASSEMBLY - INSPECTION/CHECK
EFFECTIVITY
EF WA GJ AP ALL EXCEPT B2601, B2603 AND B2607 N4501W thru N4530W, N4569N, 4571M, N235WA, EI-BPW, -BPY, -BRB, -BOM and -BON ALL EXCEPT B-2509, B-2510 N458AC, N725AL and N726AL
1. General
A. The following chart and illustrations provide wear limit information for inspection of the components shown. No procedure is given for gaining access to, or removing and replacing, the component after inspection. Refer to Drum and Brake Assembly - Removal/Installation procedures for this information.
2. Drum and Brake Assembly Wear Limits (Fig. 601)
K92182
569 Drum and Brake Assembly Wear Limits
Feb 15/78 Figure 601 (Sheet 1) 76-11-91
Page 601
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Drum and Brake Assembly Wear Limits 500
76-11-91 Figure 601 (Sheet 2) Jun 20/83
Page 602
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Drum and Brake Assembly Wear Limits
Jun 20/83 Figure 601 (Sheet 3) 76-11-91
Page 603
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
TORQUE SWITCH MECHANISM - REMOVAL/INSTALLATION
EFFECTIVITY
BA G-BKYA and on WA ALL EXCEPT N4501W thru N453OW, N4569N, N4571M, N235WA, EI-BPW, BPY, BRB, -BOM, and –BON GJ B-2509, B-2510
1. General
A. The autothrottle servomechanism consists of two parts: a torque switch mechanism which includes the input and output quadrants and the actuator assembly which includes a servo motor, reduction gear train and electromagnetic clutch. One autothrottle servomechanism is associated with each engine.
B. The actuator portion of the autothrottle servomechanism can be removed and re-installed without disturbing the engine control-cable system, or removal of any component other than the four attaching bolts and the electrical connector (Ref 22-31-91).
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