MAINTENANCE MANUAL

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80-11-05 Removal/Installation 401 ALL FILTER - START VALVE 80-11-04 Maintenance Practices 201 ALL PANEL ASSEMBLY - ENGINE IGNITION 80-11-51 AND STARTING Removal/Installation 401 ALL STARTER 80-11-01 Removal/Installation 401 ALL Starter Installation 403 Starter Removal 401 Inspection/Check 601 ALL VALVE - START 80-11-02 Removal/Installation 401 ALL 80-CONTENTS HAWW Page 1 Dec 22/08 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 767 MAINTENANCE MANUAL //////////////////////// //////////////////////// / / / / CF6-80C SERIES ENGINES STARTING SYSTEM - DESCRIPTION AND OPERATION 1 . General (Fig. 1) A. The engine starting system provides the means of rotating the engine N2 compressor on the ground or in flight to an rpm at which engine start can occur. The starting system assists the engine to accelerate to approximately 50% N2 rpm, at which time the starting system will stop operating. For inflight start, the system can be energized to supplement a windmilling engine if required. System components for each engine include the starter, start valve, start valve disagreement light, pneumatic ducting, and necessary control circuitry (Fig. 1). Switches on the engine start and ignition control module located on the pilots' overhead panel P5, control the engine starting system operation. B. Power for the system is 28 volts dc supplied from the overhead circuit breaker panel P11 battery bus. C. Pneumatic power can be obtained from three separate compressed air sources: the airplane auxiliary power unit (APU), ground carts through service connections, or cross-bleed air from an operating engine. 2 . Component Details A. Starter (Fig. 2) (1) The engine starter converts high energy compressed air to starter shaft torque sufficient to accelerate the engine to starting speed. The starter is a lightweight, single stage, axial flow, turbine air motor consisting of a nozzle, turbine wheel and shaft, reduction gear train, exhaust screen, housing assembly, clutch mechanism, and output drive shaft. Starter operation is controlled by the start valve which opens on demand to permit air to flow into the starter inlet. (2) The starter is mounted on the aft face of the accessory gearbox at the 6 o'clock drive pad. It is secured to an adapter pad by a V-band coupling and accurately located by two locator pins on the starter flange. (3) The starter gears and bearings are splash-lubricated by a self-contained oil system. Fill and drain ports are provided in the housing for servicing. The magnetic drain plug assembly consists of an inner magnetic probe and an outer drain plug. The magnetic probe can be removed to check for metallic chips without draining the oil. A check valve in the drain plug prevents draining when the magnetic probe is removed. B. Start Valve (Fig. 3 and Fig. 4) (1) The start valve controls compressed air flow to the engine starter. The valve is a spring loaded closed, electrically controlled, pneumatically operated shutoff valve. The start valve has two major components, the valve body and the actuator. EFFECTIVITY oe 80-11-00 ALL oe oe H01 Page 1 oe Apr 22/00 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 767 MAINTENANCE MANUAL //////////////////////// //////////////////////// / / / / CF6-80C SERIES ENGINES RAM AIR TURB VALVE VALVE PRESS a a a g UNLKD ENG START L R GND AUTO OFF CONT FLT GND AUTO OFF CONT FLT SINGLE BOTH Engine Start Controls Figure 1 A B SWITCHES FUEL CONTROL FLIGHT COMPARTMENT SEE A SEE B L FUEL CONTROL R RUN CUTOFF SPAR VALVE a VALVE SPAR a VALVE VALVE ENG a REV a ENG ISLN a 720590 EFFECTIVITY oe 80-11-00 ALL oe oe H04 Page 2 oe Feb 10/90 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 767 MAINTENANCE MANUAL //////////////////////// //////////////////////// / / / / CF6-80C SERIES ENGINES AIR INLET STARTER FWD EXHAUST OIL FILLER CAP (2 LOCATIONS) STARTER DRIVE SHAFT SEE B SEE A B Figure 2 Starter A OVERFLOW PLUG OVER FLOW OVER FLOW DRAIN PLUG MAGNETIC PROBE 222748 EFFECTIVITY oe 80-11-00 ALL oe oe H01 Page 3 oe Aug 10/91 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 767 MAINTENANCE MANUAL //////////////////////// //////////////////////// / / / / CF6-80C SERIES ENGINES STARTER (REF) START VALVE STARTER PNEUMATIC DUCT (REF) A SEE A Figure 3 Start Valve FWD 936737 EFFECTIVITY oe 80-11-00 ALL oe oe H03 Page 4 oe Aug 10/91 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 767 MAINTENANCE MANUAL //////////////////////// //////////////////////// / / / / CF6-80C SERIES ENGINES Figure 4 Start Valve Schematic CHAMBER A SPRING CLOSING TORSION DIAPHRAGM INDICATOR MANUAL OVERRIDE AND POSITION BLEED-OFF PRESSURE REGULATOR BUTTERFLY PLATE FLOW AIR AIR FILTER CHAMBER B SOLENOID ORIFICE OPENING RATE VENT HEATING JACKET ORIFICE CLOSING RATE ORIFICE AMBIENT VENT REGULATOR DIAPHRAGM SWITCHES POSITION 936598 EFFECTIVITY oe 80-11-00 ALL oe oe H03 Page 5 oe Aug 10/91 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 767 MAINTENANCE MANUAL //////////////////////// //////////////////////// / / / / CF6-80C SERIES ENGINES (2) The dual diaphragm, pneumatic actuator is torsion-spring loaded with a solenoid valve, position switch, and an externally mounted relief valve. The actuator is connected to the butterfly shaft with a connecting link and arm. The solenoid valve is a three-way ball valve. The position switches have four electrical switches enclosed in a housing on top of the actuator. A manual drive and position indicator is located on top of the position switch(es). A bleed-off pressure regulator is a spring-loaded, poppet type, relief valve. (3) The valve body contains the butterfly shaft, bearings and a butterfly plate. The position of the start valve butterfly plate is controlled by the solenoid valve. Air immediately upstream of the butterfly plate is filtered and routed through an orifice to chamber A, the solenoid valve, and chamber B (Fig. 4). When the solenoid is energized, the ball valve moves to the opposite seat. This shuts off air pressure to chamber B and vents air pressure in chamber B to ambient through the opening rate orifice. Air pressure acts on the large diameter diaphragm against the combined force of the torsion spring and the upstream pressure acting on the small diameter diaphragm. The force from the opening diaphragm is transmitted through a mechanical linkage to rotate the butterfly plate toward the fully open position. C. Engine Start and Ignition Control Module (Fig. 5) (1) The engine start and ignition control module, on pilot's overhead panel P5, is comprised of two ign/start control switches, an ignition select switch, and two starter control VALVE disagreement lights. The ignition select switch and the functions of the L(R) ign/start control switch pertaining to ignition are described in 74-00-00, Ignition System - Description and Operation. (2) The L(R) ign/start control switch has five positions: GND, AUTO, OFF, CONT and FLT. There is a separate start switch for each engine. The position of the L(R) ign/start control switch controls which ignition system will operate for that engine. (3) GND position is a solenoid-held, push-in and rotate selector. The GND position opens the start

bocome 发表于 2011-7-30 22:56:11

MAINTENANCE MANUAL

liujunwei3980 发表于 2014-1-27 17:45:48

thankyouverymuch

bei1999 发表于 2016-5-3 06:15:50

737-800中文AMM手册

mengkyq 发表于 2016-12-5 22:28:30

谢谢分享

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MAINTENANCE MANUAL