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9) If installed, install inspection door 211L - refer to 06-30-00. Otherwise, lock the L.H. instrument panel. 2. TEST OF THE NORMAL DISTRIBUTION SYSTEM (Figure 502) A. Tools and consumable materials None B. Procedure 1) Close main switch-breaker. "GYRO SUCT" red warning light (1) comes on. 2) If "GYRO SUCT" red warning light (1) remains off, press "TEST" button (2), then repair the wiring or replace the bulb, as applicable. 3) Start the engine - refer to 05-30-01. 4) Display 2000 rpm. 5) Check that the pointer of pressure indicator (3) remains in the green range between 4.4 and 5.2 in.Hg. 6) Shutdown the engine - refer to 05-30-01. 7) If the pointer is not in the green range, perform the following operations and check the system for correct operation after each step : a) Adjust the regulating valve - refer to Paragraph 1., b) If the values are still not obtained, check the entire system - refer to Page 601, c) Check the instruments, replace if necessary. 8) Open main switch-breaker. AAAA Validity : OPT or STD Post-MOD. 151 37-11-00(BA) Page 501 SEP 04 Normal distribution - Adjustment of the regulating valve Figure 501 AAAA Validity : OPT or STD Post-MOD. 151 37-11-00Page 502 (BA) SEP 04 Normal distribution - Test of the normal distribution system Figure 502 WA Validity : OPT or STD Post-MOD. 151 37-11-00Page 503 (BA) SEP 04 PAGE INTENTIONALLY LEFT BLANK AAAA Validity : OPT or STD Post-MOD. 151 37-11-00Page 504 (BA) SEP 04 NORMAL DISTRIBUTION INSPECTION / CHECK 1. CHECK OF THE NORMAL DISTRIBUTION SYSTEM (Figures 601, 602 and 602A) A. Tools and consumable materials None B. Procedure 1) Remove engine cowling 121 - refer to 71-10-01. 2) If installed, remove inspection door 211L and, if necessary, remove inspection door 211R - refer to 06-30-00. NOTE : The instruments may also be installed on the R.H. instrument panel. 3) Tilt the L.H. instrument panel and, if necessary, the R.H. instrument panel - refer to 31-10-01. 4) Inspect hoses (2) for : - clamp tightening, - cracking, pinching or fretting wear, - correct position in the clips, - attachment with tie-wraps, without crushing, - presence and attachment of plugs (4), if there is only one instrument. 5) Inspect filter (1) for : - condition and cleanliness, - attachment. 6) Inspect regulating valve (5) for : - filter condition and cleanliness, - attachment to the firewall, - locking of the flow cock, - correct connection of the wires of S67 pressure switch (if installed). 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 37 真空 TB20飞机维护手册(6) |
