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AAAA Validity : S / N 1 - 9999 aep30022 28-00-00 (BA) Page 3. MAINTENANCE PROCEDURE IN TANKS Apply the safety precautions - refer to Paragraph 1.B. A. Tools and consumable materials - Explosion-proof lamps - Pneumatic vacuum cleaner B. Procedure 1) Connect a grounding cable to the aircraft, then to an approved ground rod. 2) Disconnect the battery and install the following warning sign : WARNING DO NOT CONNECT MAINTENANCE WORK IN PROGRESS ON FUEL SYSTEM 3) Ventilate the tanks - refer to 12-11-03. 4) Perform the maintenance operation. 5) Make sure all the tools and materials are removed and the work area is clean and free from debris. 6) Recondition the tanks - refer to 12-11-03. 7) Refuel the tank - refer to 12-11-01 and make sure there are no leaks. 8) Connect the battery. 9) Remove the warning sign prohibiting main switch-breaker operation. AAAA Validity : S / N 1 - 9999 28-00-00Page 303 (BA) SEP 02 PAGE INTENTIONALLY LEFT BLANK FUEL INSPECTION / CHECK 1. SEALING CHECK OF THE FUEL SYSTEM UNDER PRESSURE A. Tools and consumable materials None B. Procedure WARNING : APPLY ALL THE SAFETY PRECAUTIONS - REFER TO PAGE 301 WARNING : SEALING CHECK OF THE FUEL SYSTEM MUST BE PERFORMED WHEN THE ENGINE IS SHUT DOWN AND COLD. NOTE : This procedure only allows sealing check on the system under pressure located downstream of fuel electric pump. 1) Remove the engine cowlings - refer to 71-10-01. 2) Remove all the access doors to the unions to be checked. 3) Close main switch-breaker. 4) Close fuel pump switch-breaker. 5) Set throttle and mixture controls to forward stop. 6) Wait for approx. 30 seconds to allow pressure to stabilize in the system. 7) Check for leaks. 8) Set throttle and mixture controls to rearward stop. 9) Open fuel pump and main switch-breakers. 10) If a leak is found, make sure the suspect union or pipe is correctly tightened or replace the defective part. 11) Make sure all the tools and materials are removed and the work area is clean and free from debris. 12) Install all the removed access doors. 13) Install the engine cowlings - refer to 71-10-01. 14) If the engine must be started immediately after the sealing check, refer to Flight Manual, Section 4 "ABORTED START". 2. SEALING CHECK OF THE FUEL SYSTEM WITHOUT PRESSURE A. Tools and consumable materials None B. Procedure WARNING : APPLY ALL THE SAFETY PRECAUTIONS - REFER TO PAGE 301. 1) Remove the engine cowlings - refer to 71-10-01. 2) Remove all the access doors to the unions to be checked. 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 28 FUEL TB20飞机维护手册 燃油(11) |
