BOEING 737
MAINTENANCE MANUAL

CHAPTER 55 TAB EFFECTIVE PAGES SEE LAST PAGE OF LIST FOR NUMBER OF PAGES CONTENTS 55 1 FEB 01/95 5332 OCT 20/92 533 55- 00 1 APR 15/66 5002 BLANK 55- 10-0 1 FEB 15/72 5312 APR 15/66 5003 NOV 15/66 5004 BLANK 55- 10- 10 401 OCT 20/92 500402 OCT 20/92 500403 OCT 20/92 500404 FEB 20/93 500405 FEB 20/93 500406 BLANK 55- 20-0 1 FEB 20/87 5242 MAY 15/69 523 55- 30-0 1 FEB 15/71 5232 NOV 15/66 500 55- 30-0 401 FEB 20/93 500402 FEB 20/93 543403 FEB 20/93 543404 FEB 20/93 500405 FEB 20/92 500406 FEB 20/92 500407 FEB 01/95 543408 FEB 20/92 543409 FEB 20/92 500410 FEB 01/95 543 55- 30-0 601 JAN 20/82 543602 BLANK 55- 30- 11 801 JAN 20/82 500802 JAN 20/82 500803 FEB 01/95 500804 JAN 20/82 500805 JAN 20/82 500806 JAN 20/82 500807 JAN 20/82 500 PAGE DATE CODE  55- 30- 11 (CONTINUED)808 JAN 20/82 500809 JAN 20/82 500810 JAN 20/82 500811 JUN 20/84 500812 JAN 20/82 500 55- 32- 11 401 FEB 20/88 500402 FEB 20/88 500403 FEB 20/88 500404 BLANK 55- 33- 11 401 OCT 20/86 500402 OCT 20/86 500403 OCT 20/86 500404 BLANK 55- 33- 21 401 MAY 15/67 500402 BLANK 55- 40-0 1 FEB 20/87 5242 FEB 15/68 500 55- 50-0 1 APR 15/66 5002 BLANK PAGE DATE CODE  PAGE DATE CODE  PAGE DATE CODE 

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CHAPTER 55
STABILIZERS
TABLE OF CONTENTS
Subject Subject No.
STABILIZERS................................................................................................................. 55-00 Description and Operation
HORIZONTAL STABILIZER........................................................................................... 55-10-0 Description and Operation
Stabilizer Structure
Inspection/Check - Free Play Limits (Ref 27-41-31)
Removal/Installation (Ref 27-41-11)

Thrust Brace Links ................................................................................................... 55-10-10 Removal/Installation
ELEVATOR .................................................................................................................... 55-20-0

Description and Operation
Elevators
Elevator Control Tabs

VERTICAL STABILIZER (FIN) ....................................................................................... 55-30-0 Description and Operation
Vertical Fin Structure
Removal/Installation
Inspection/Check

Vertical Stabilizer (Fin) Attach Fittings..................................................................... 55-30-11 Approved Repairs
Dorsal Fin................................................................................................................. 55-32-11 Removal/Installation
Vertical Stabilizer (Fin) Leading Edge ..................................................................... 55-33-11 Removal/Installation
Vertical Stabilizer (Fin) Tip....................................................................................... 55-33-21 Removal/Installation
RUDDER ........................................................................................................................ 55-40-0 Description and Operation Rudder Structure
533 
Feb 01/95  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Contents 55 Page 1 

Subject Subject No.
ATTACH FITTINGS........................................................................................................ 55-50-0

Description and Operation
Elevator Attach Fittings
Horizontal Stabilizer Center Section Truss Attach Fittings
Horizontal Stabilizer Outboard Sections Attach Fittings
Rudder Attach Fittings
Vertical Fin Attach Fittings

533 
Contents 55 Page 2  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Oct 20/92 

STABILIZERS - DESCRIPTION AND OPERATION
1.  General
A.  The stabilizers comprise the empennage of the airplane and consist of a vertical stabilizer (fin), and a horizontal stabilizer. (See figure 1.) The vertical fin, a structure composed of front and rear spars with interconnecting ribs and skin, is attached to the fuselage. The left and right horizontal stabilizer outboard sections are attached to an adjustable center section truss located within the fuselage. The movable center section pivots on two hinge joints attached to a bulkhead in the fuselage and is operated by a jackscrew mounted at the front spar. Each horizontal outboard section consists of two spars with interconnecting ribs and skin forming a torsion and bending structure. A rudder is hinged from the vertical fin and elevators are hinged from the horizontal stabilizer. A dorsal fin fairs in the fuselage and the vertical fin.

500  Empennage 
Apr 15/66  Figure 1  55-00 
　
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