TM 1-1510-224-10 9-27.  ELECTRICAL SYSTEM EMERGENCIES. a. DC  GEN  Annunciator  Illuminated.    When  a  DC GEN annunciator illuminates, perform the following: (1) GENERATOR switch -  OFF, RESET,  then ON. (2) GENERATOR switch (no reset) - OFF. (3) MISSION CONTROL switch - ORIDE. (4) Operating loadmeter - 100% maximum. b. Both   DC   GEN   Annunciators   Illuminated   (reset failed). (1) All nonessential equipment - Off. 2. Land as soon as practicable. c.      Excessive   Loadmeter   Indication   (over   100%).      If either    loadmeter    indicates    over    100%,    perform    the following: (1) BATTERY switch - OFF (monitor loadmeter). (2) Loadmeter     over     100%     -     Nonessential electrical equipment off. (3) Loadmeter    under    100%        -     BATTERY switch ON. d. INVERTER    Annunciator    Illuminated.          When either  #  1  or  #  2  INVERTER   annunciator   illuminates, perform the following: (1) Affected INVERTER switch - Off. e. INST AC Annunciator Illuminated. NOTE Illumination  of  the,  INST  AC  warning annunciator    indicates    that    both    26 VAC circuits are inoperative. The following systems will be affected: NAV #1 NAV #2 Heading #2 #1 torquemeter · #2 torquemeter Pilot's EFIS Copilot's EFIS INS ADF #1 rate of turn #2 rate of turn Air data computer Under these conditions, power must be governed by indications of N, and TGT gages.  Perform the following: 1. N, and TGT indications - Check. 2. Other engine instruments - Monitor. f. Circuit Breaker Tripped.  If a circuit breaker trips, perform the following: 1. Bus feeder breaker tripped - Do not reset. NOTE Circuit  breakers  should  not  be  reset more   than   once   until   the   cause   of circuit malfunction has been determined and corrected. 2. Nonessential circuit - Do not reset. (3) Essential circuit - Reset once. g. BATTERY CHARGE  Annunciator  Illuminated.    If the  BATTERY  CHARGE  caution  annunciator  illuminates during normal cruise flight, perform the following: (1) Battery  ammeter  -  Check,  note  indication, and   monitor   for   increasing   load.      If   load continues  to  increase,  turn  battery  switch OFF. (2) BATTERY switch - OFF. NOTE The  battery  may  be  turned  back  ON only  for  gear  and  flap  extension  and approach to landing.  Battery may be usable   after   a   15   -   20   minute   cool down period. (3) BATTERY switch (landing gear/flap extension only) - ON. h. AVIONICS  MASTER  POWER  Switch Failure.    If the AVIONICS MASTER POWER switch fails to operate in the ON position, perform the following: (1) AVIONICS MASTER CONTR circuit breaker - Pull. 9-12