R  a_  If the fault continues:
R  - repair the wiring (Ref. ASM 52-73/02) between: 
R  .the relay 3EN1 pin A/1 and the circuit breaker 2EN1 
R  .the relay 3EN1 pin A/A and the relay 18WN1 pin A/X. 
R  b_  If the fault continues:
R  - connect pin A/Z of the relay 3EN1 again, 
R  - replace the CTL SW-ENG/MASTER 1 (3KC) (Ref. ASM 76-
R  12/01). 
R  c_  If the fault continues:
R  - repair the wiring (Ref. ASM 79-36/01) between: 
R  .the control switch 3KC pin 3A and the relay 3EN1 pin A/Z 
R  .the control switch 3KC pin 1A and the ground. 
R  C. After the subsequent flight, make sure that the fault does not continue.