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6) Perform a test run-up - refer to 05-30-02. 7) Once the different engine parameters have stabilized, with the alternator switch-breaker closed, switch on the following equipment items to reach a load charge of approximately 20 A : - landing and taxiing lights, - navigation lights and anti-collision lights, ADAB Validity : S / N 823 - 849, 888, 948 - 9999 24 30-00 Page 601 (CG) SEP 04 - radionavigation and A/P systems. 8) Check that the on-load mains voltage at 2000 rpm is 27.5 VDC ± 0.1 and that the indication of the engine monitoring cluster voltmeter stabilizes inside the green sector. If necessary, adjust the voltage with the voltage regulator adjustment screw. 9) Check the on-load regulation range between 1200 and 2500 rpm, the indication of the engine monitoring cluster voltmeter remains inside the green sector. 10) Switch off the equipment items. 11) Check that the off-load voltage at 2000 rpm is within 27.8 and 28.2 VDC. 12) Check the amber (red on U.K. aircraft) warning light labeled "ALIT"' for operation : a) With the equipment items switched off, open the alternator switch-breaker and switch on the same equipment items. The warning light must come on. b) With the engine rating within the regulation range (1200 to 2500 rpm), close the alternator switch-breaker. The warning light must go off. 13) Shut down the engine - refer to 05-30-02. Check without a test set 14) Disconnect the voltmeter from the mains. Check with a test set 14) Switch off the test set and disconnect the test set connector from the engine monitoring cluster. 15) Install the engine monitoring cluster. All 16) Make sure all the tools and materials are removed and the work area is clean and free from debris. Pre-MOD. 151 17) Close inspection door 212R and install engine cowling 121 - refer to 71-10-01 or install inspection door 211 R if removed. Post-MOD. 151 with voltage regulator on firewall on cabin side 17) Install inspection door 211R. Post-MOD. 151 with voltage regulator on L.H. panel strip 17) Install the blanking cap on the L.H. panel strip. 2. CHECK OF VOLTAGE REGULATOR OVERVOLTAGE SYSTEM (Figure 602) A. Tools and consumable materials - 1 stabilized power supply source adjustable within 24 and 36 V B. Procedure 1) Beforehand, perform a check and, if necessary, an adjustment of the voltage regulator - refer to Paragraph 1. 2) Disconnect and, if necessary, remove the voltage regulator. ADAB Validity : S / N 823 - 849, 888, 948 - 9999 24-30-00Page 602 (CG) SEP 04 CAUTION : IF THIS CHECK IS NOT CARRIED OUT IN A LABORATORY, MAKE SURE THE TEST WIRING IS PERFECTLY INSULATED FROM THE AIRCRAFT CIRCUIT. 3) Fabricate the test wiring according to Figure 602. 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 24 COMMUNICATIONS TB20飞机维护手册 电源(22) |
