3.
Avoiding rivets, place the balancing tool on the control surface with the tool’s hinge centerline directly over the hinge line of the control surface.
4.
Adjust the movable trailing edge support to fit the width of the control surface. Tighten the set screw on the trailing edge support.
5.
Adjust the trailing edge support vertically until the beam is parallel with the control surface chord line.
6.
Remove the tool from the control surface and balance the tool itself by adding or removing nuts or washers from the beam balancing bolt. When balancing the tool, the movable weight must be at the bar’s hinge centerline.
7.
After balancing the tool, reattach it to the control surface. Keep the beam positioned 90° from the control surface hinge line.
8.
Determine balance of control surface by sliding movable weight along the balance beam.
9.
Read the scale when the bubble in the level has been centered. Since the movable weight weighs three pounds, every inch it is moved from the center of the beam equals three inch-pounds of force.
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3D16
CHAPTER
56
WINDOWS
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CHAPTER 56 - WINDOWS
TABLE OF CONTENTS / EFFECTIVITY
CHAPTER/ GRID SECTION SUBJECT NO. EFFECTIVITY
56-10-00 FLIGHT COMPARTMENT 3D22 Windshield 3D22 Removal and Installation 3D22 Emergency Exit Window 3E2 Removal and Installation 3E2 56-20-00 CABIN 3E2 Side Windows 3E2 Removal and Installation 3E2
56-Cont./Effec. Page 56-3 Issued: April 1, 1997
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3D20
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56-10-00 Page 56-5 Issued: April 1, 1997
FLIGHT COMPARTMENT.
WINDSHIELD.
REMOVAL AND INSTALLATION OF WINDSHIELD. (Refer to Figure 56-1.)
1.
Remove the collars from around the bottom of the windshield and the trim strip from between the windshield halves by removing the attaching screws.
2.
Remove the windshield by raising the lower portion of the windshield and carefully pulling it out and down to release the top and side edges.
— Note —
A damaged windshield should be saved to provide a pattern for shaping the new window.
3.
Clean old tape and sealer off the affected mating surfaces.
4.
Match new winshield to old. If necessary, cut or grind the new windshield to matching dimensions.
5.
Apply 1/8 in. by 1 in. vinyl foam tape, Norton V510 or equivilent (see Chart 9105, Tape - Vinyl Foam, Type 2), around entire edge of windshield.
6.
Place windshield into position, sliding aft and up into place. Take care not to dislocate vinyl foam tape. Allow clearance for expansion between the two windshield sections at the center post.
7.
Apply 1.5 in., 9 mil, black vinyl tape covering the previously applied vinyl foam tape and sealing the joint between the windshield and airframe as indicated in Figure 56-1.
8.
Apply polyurethane, urethane, acrylic, or polysulfide sealant (see Chart 9105, Sealant - Window and Airframe), to seal the forward edge of the vinyl tape at the bottom of the center post, as indicated in Figure 56-1, View E-E.
9.
Reinstall collars and trim strip. Apply sealant as indicated in Figure 56-1 by forcing the sealant between the mating parts. Mating parts may be separated slightly using a soft wooden wedge or a tongue depressor. Force sealant deep into the gap. Take care to avoid bending or scratching aluminum or windshield surfaces. Joints should be completely filled, and blended smoothly with adjacent surfaces after clean-up.
10.
Remove excess sealant and exposed tape. Sealant may be cleaned from window areas using rags, disposable wipers or plastic scrapers. A tool made of acrylic sheet with a wedged end (.25 in. thick and 1.5 in. wide) can be fabricated and used. Tirpolene solvent or Apperson solvent No. 120 may be used to clean polysulfide sealants.
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3D22
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3D24
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56-20-00 Page 56-9 Issued: April 1, 1997 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：西门诺尔飞机维护手册 simenole PA-44-180 AMM 2(50)
