TM 55-1520-240-T9-2.4AC POWER SYSTEM OPERATIONAL CHECK (Continued)9-2.4TASKRESULT12.Set GEN NO. 2 switch (16) to TEST. NO. 2 GEN OFF (Without 74) GEN 2 (With 74) capsule(18) shall go out. If it does not, check ground stud GD102(STA 594, WL 58, RBL 8), for security and good bond tostructure. If capsule (18) still does not go out, go to task9-2.10.13.Set GEN NO. 2 switch (16) to ON.NO. 2 GEN OFF (Without 74) GEN 2 (With 74) capsule(18) shall stay out. If capsulecomes on, go to task 9-2.11.14.Set GEN NO. 1 switch (15) to OFF.NO. 1 GEN OFF (Without 74 ) GEN 1 (With 74) capsule(17) shall come on. NO. 1 RECT OFF and NO. 2 RECTOFF (Without 74)RECT 1 and RECT 2 (With 74)capsules (13 and 14) shall stay out. If they come on, go totask 9-2.12.15.Set GEN NO. 1 SWITCH (15) to ON.16.Have pilot start apu and switch on apu generator.17.Set GEN NO. 1 switch (15) to OFF.NO. 1 GEN (Without I) GEN 1 (With 74) b capsule shallcome on. NO. 1 RECT OFF (Without 74)RECT 1 (With74) capsule shall stay out. If it comes on, go to task9-2.15.18.Set GEN NO. 1 switch (15) to ON.19.Set GEN NO. 2 switch (16) to OFF.NO. 2 GEN OFF (Without 74) GEN 2 (With 74) capsuleshall come on. NO. 2 RECT OFF (Without 74)RECT 2(With 74) capsule shall stay out. If it comes on, go to task9-2.15.20.Have pilot shutdown engines.NOTEThe following steps can only be performed with anexternal ac power source.21.Connect a 115/200VAC Hz AC external power sourceEXT PWR capsule (20) shall come on. If it does not, go toto receptacle (19). Turn on power source.task 9-2.13. NO. 1 RECT OFF and NO. 2 RECT OFF(Without 74)RECT 1 and RECT 2 (With 74) capsules(13 and 14) shall go out. If they do not, go to task 9-2.14.22.Turn off and disconnect power source.FOLLOW-ON MAINTENANCE:TM 55-1520-240-23:Battery DisconnectedElectrical Power OffEND OF TASK9-66 Change 19
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