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- A landing gear control knob, - Three green lights to provide gear down-locked indication for each landing gear, - A day / night dimmer switch to select indicator light intensity. On landing gear configuration and control panel, a lever with two positions, (up - down) and mechanical locking controls landing gear maneuvers. To perform these maneuvers it is necessary to pull this lever and set it on the position previously chosen. Hydraulic pressure appears in the circuit and brings landing gear into selected position. The lever keeps the first chosen position. Landing gear configuration and control panel allows, besides control of landing gear, the visualization of landing gear position, within following conditions : - A green indicator light for each landing gear "down" and locked (controlled by the microswitch located on the hinged strut of each landing gear). - A single red warning light for the three landing gears, indicating that they are operating in "up" or "down" maneuver (controlled by microswitches located in landing gear wells). Furthermore, these lights are equipped with a test and a contactor dimmer for day / night utilization. B. Ground safety microswitch The ground safety microswitch switches off the electric power supply of the electrohydraulic generator when the aircraft is on the ground. It is located on each main landing gear at the gimbal joint level providing the connection between the shock-absorber and the rocker beam. Controls, check and indicating system - Location of components Figure 1 PAGE INTENTIONALLY LEFT BLANK WA Validity : S / N 1 - 9999 32-60 Page 4 00 (BA) JUN 01 POSITION INDICATING SYSTEM AND ALARMS TROUBLE-SHOOTING 1. TROUBLE-SHOOTING PROCEDURE Figure 101 : No indication on configuration and control box. Figure 102 : Red warning light is ON. A green indicator light is OFF. Figure 103 : Red warning light does not illuminate. Figure 104 : Red warning light remains ON. Figure 105 : No illumination of "PARK BRAKE" module on advisory panel. Figure 106 : "PARK BRAKE" module remains ON on advisory panel. WA Validity : S / N 1 - 9999 32-60 Page 101 00 (BA) JUN 01 NO INDICATION ON PREREQUISITES CONFIGURATION AND "LDG GEAR" "PULL OFF" TYPE CONTROL BOX CIRCUIT-BREAKER CLOSED IF FAILURE PERSISTS, REPLACE CONFIGURATION AND CONTROL BOX No indication on configuration and control box Figure 101 AAAA Validity : S / N 1 - 9999 32-60-00 Page 102 32 (BA) JUN 01 RED WARNING LIGHT IS PREREQUISITES ON. A GREEN INDICATOR "LDG GEAR" "PULL OFF" TYPE LIGHT IS OFF CIRCUIT-BREAKER CLOSED 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 32 起落架 TB20飞机维护手册(101) |
