symbol designates an AND gate.
(2)
An OR circuit requires any one input of a logic circuit to be 1 to obtain a 1 output. A + symbol is used to designate an OR function; a
symbol designates an OR gate.
(3)
A bar over a function designates a logic inversion (NOT function), e.g., PITCH ENGAGE = 0 if pitch is engaged.
B. To aid discussion of auto flight systems, reference numbers are assigned to summing points and solid-state switches shown on schematics. Solid-state switches are represented by conventional switch symbols. The logic function opposite each switch indicates the condition(s) necessary to actuate the switch. The digital computer circuitry is replaced by simplified analog circuitry to help system understanding.
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22-00-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
AUTO FLIGHT - MAINTENANCE PRACTICES
___________________________________
1. General
________
A. Maintenance on the electro-hydraulic components of the auto flight system can include the use of BMS 3-11 hydraulic fluid. This procedure contains the data about how to use the BMS 3-11 hydraulic fluid safely.
TASK 22-00-00-502-001
2. How to Use the BMS 3-11 Hydraulic Fluid Safely
_______________________________________________
A. Consumable Materials
(1) D00148 Fluid - Hydraulic, Fire Resistant, BMS 3-11, Type IV, Class 1
B. References
(1) 51-21-00/701, Protective Finishes - Cleaning/Painting
C. Procedure
S 692-022
CAUTION: DO NOT MIX THE BMS 3-11 HYDRAULIC FLUID WITH THE MIL-H-5605
_______ HYDRAULIC FLUID. THE MIXTURE OF THESE TWO HYDRAULIC FLUIDS CAN CAUSE DAMAGE TO THE EQUIPMENT.
(1)
The BMS 3-11 hydraulic fluid is the approved hydraulic fluid used in all of the hydraulically operated systems. The BMS 3-11 hydraulic fluid is a fire-resistant base fluid. You can mix two hydraulic fluids which have the same specification as the BMS 3-11. There are labels to identify the airplane equipment that uses the BMS 3-11 hydraulic fluid.
S 622-024
(2)
The BMS 3-11 hydraulic fluid can cause corrosion to some materials. Use special paint to prevent corrosion in areas of hydraulic leaks (Ref 51-21-00/701).
S 922-025
WARNING: DO NOT BREATHE THE POISONOUS FUMES AND GASSES FROM BMS 3-11
_______ HYDRAULIC FLUID THAT BECOMES TOO HOT. MAKE SURE THAT YOU HAVE THE RESPIRATORY AND EYE PROTECTIONS. THE BMS 3-11 HYDRAULIC FLUID GIVES OFF POISONOUS FUMES AND GASSES IF IT IS HOTTER THAN 450° F. THESE FUMES AND GASSES ARE DANGEROUS TO YOUR HEALTH.
(3) The BMS 3-11 hydraulic fluid can cause skin irritation in the form of dry and cracked skin. It can cause painful and temporary irritation to the eyes. It can also give a burning sensation to other sensitive parts of the body. If you breathe the BMS 3-11 hydraulic fluid spray, it can cause irritation. Put on rubber gloves, goggles, face shields or other safety glasses. If the BMS 3-11 hydraulic fluid gets into your eyes, flush them with water and get medical aid immediately.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
DIGITAL FLIGHT CONTROL SYSTEM - DESCRIPTION AND OPERATION
_________________________________________________________
1. General
_______
A. The SP300 Digital Flight Control System (DFCS) is part of the Flight Management System (FMS). The FMS is the integration of four major systems including:
DFCS - Digital Flight Control System
A/T - Autothrottle System (AMM 22-31-00)
IRS - Inertial Reference System (AMM 34-28-00)
FMCS - Flight Management Computer System (AMM 34-62-00)
B. The SP300 Digital Flight Control System (DFCS) is an all digital system that includes the following functions: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 自动飞行 AUTOFLIGHT 1(8)
