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These three controls vary the intensity of all instrument panel and L.H. sidewall circuit-breakers panel lights, except for the rear overhead light. The following paragraphs describe the function of these controls. A courtesy light is installed in the cabin headliner, in front of the aerators, to facilitate boarding or deplaning the airplane during night operations. No power is to be applied to the main electrical system bus bars for operation (Main switch may remain OFF) of the circuit. This light is controlled by a tumbler switch integrated to the light. Tilting this overhead light will switch it off or provide a continuous or an intermittent operation controlled by the opening of the L.H. front door. Option pre-MOD. 151, Standard post-MOD. 151 A maps reading light is installed in the bottom of the pilot's control wheel. This light illuminates the lower portion of the cabin in front of the pilot and is used for reading maps and other flight data during night operation. It is controlled by a switch located on the right horn of the pilot's control wheel. 3. OPERATION They allow the operating from down to up of : - "Normal" control which controls and modulates L.H. and R.H. instrument panels visors lighting. - "Radio and instruments" control which controls and modulates lighting of console visor and of instruments and equipment on instrument panel and circuit-breakers panel. Pre-MOD. 151 - "Emergency" control which modulates lighting of front overhead lights controlled by rotating them. NOTE : - Both "normal" and "radio and instruments" controls operate and modulate lighting ; from high position "OFF", turn clockwise for "FULL INTENSITY OPERATION" then still clockwise, modulate towards "MINIMUM INTENSITY", turn back to "OFF" position turning counterclockwise. - "Emergency" control modulates lighting ; from high position "FULL INTENSITY" turn clockwise to modulate towards "MINIMUM INTENSITY" ; turn back to high position "FULL INTENSITY" turning counterclockwise . Post-MOD. 151 - "Emergency" control which controls and modulates the lighting of front overhead lights. NOTE : - The three "normal", "radio and instruments" and "emergency" controls operate and modulate lighting ; from high position "OFF", turn clockwise for "FULL INTENSITY OPERATION" then still clockwise, modulate towards "MINIMUM INTENSITY", turn back to "OFF" position turning counterclockwise. ABAH Validity : Without emergency lighting assy 33 10-00Page 1 (DA) JUN 01 Interrupteur lecteur de cartes ( si installe ) Maps reading light switch ( if installed ) Lecteur de cartes ( si installe ) Maps reading light ( if installed ) Eclairage Cde secours train & tableau disjoncteurs 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 33 灯光 TB20飞机维护手册(4) |
