539 Elevator Tab Lock Linkage Wear Limits
Nov 15/72 Figure 601 (Sheet 5) 27-31-121
Page 605
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*[1] WORN PART IS REPAIRABLE. REFER TO OVERHAUL MANUAL FOR REPAIR INFORMATION.
*[2] ENLARGE HOLE TO 0.6254-INCH MAXIMUM DIAMETER AND INSTALL OVERSIZE BUSHING TO 0.0003-0.0018 INCH INTERFERENCE. MACHINE BUSHING TO DESIGN ID LIMITS.
*[3] MAXIMUM RADIAL PLAY 0.0006 INCH.
*[4] ENLARGE HOLE TO 0.3754-INCH MAXIMUM DIAMETER AND INSTALL BACB28U4D16 BUSHING (OR EQUIVALENT) TO 0.0002-0.0013 INCH INTERFERENCE. MACHINE BUSHING TO DESIGN ID LIMITS.
*[5] ENLARGE HOLE TO 0.4379-INCH MAXIMUM DIAMETER AND INSTALL BACB28U5D45 BUSHING (OR EQUIVALENT) TO 0.0002-0.0013 INCH INTERFERENCE. MACHINE BUSHING TO DESIGN ID LIMITS.
Elevator Tab Lock Linkage Wear Limits 539
27-31-121 Figure 601 (Sheet 6) Nov 15/72
Page 606
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
ELEVATOR TAB LOCK LINKAGE - APPROVED REPAIRS
1. General
A. This procedure covers bonded installation of bushings at elevator tab lock linkage frame mechanism aft attachment brackets when bushings are being replaced at these locations.
2. Equipment and Materials
A. Adhesive - BMS 5-126, Type II, Class 1 (Ref 20-30-11)
B. Primer - EC-776 (or EC-776R also called EC-1309 or EC-776-SS), Minnesota Mining and Manufacturing Company, St. Paul, Minnesota
C. Solvent – Final Cleaning of Composites Prior to Non-structural Bonding (Series 91) (Ref AMM/SOPM 20-30-91)
3. Prepare to Replace Bushing
A. Remove old bushing by applying force evenly to bushing to break adhesive bond and force bushing out of hole (Fig. 801).
B. Clean all faying surfaces of bracket and bushing.
WARNING: DO NOT GET SOLVENT IN YOUR MOUTH OR EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FROM PROPER HANDLING PROCEDURES.
C. Apply a thin even coat of primer to faying surfaces of bracket and bushing. Dry not less than 1 hour at 80 + 10°F.
WARNING: PRIMER IS TOXIC AND FLAMMABLE. USE ONLY IN WELL-VENTILATED AREA. DO NOT GET IN EYES OR ON SKIN.
D. Prepare adhesive by blending thoroughly equal parts by weight of the two components of the adhesive.
NOTE: Blending is to be accomplished only immediately before use. Pot life of blended adhesive is 1.5 hours below 100°F.
500
May 01/98 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-31-121 Page 801
G10084
Elevator Tab Lock Linkage Bonded Bushing Replacement 500
27-31-121 Figure 801 Feb 15/80
Page 802
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
4. Replace Bushing
A. Apply a thin even coat of adhesive to each faying surface.
B. Press bushing into bracket hole, applying firm uniform pressure to ensure complete contact of the faying surfaces.
C. Wipe off excess adhesive before it has cured, using a clean cloth moistened with solvent, Series 91 (Ref AMM/SOPM 20-30-91). Do not allow solvent to flow into bond line.
D. Cure under contact pressure at ambient temperature. See figure 802 for required cure time, based on temperature. If shorter drying period is required use blower type heater and apply heat locally to bushing area. After cure, cool parts below 100°F before removing pressure.
G42365
500 Elevator Tab Lock Linkage Bonded Bushing
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