King Air 90 Trainer

C90 vs E90 – electrical differences

Lists the components modelled in each trainer (C90 from Fig. 2-14; E90 from the E90 electrical pages, Figs. 2-1 to 2-14). It is a study aid only; verify against the applicable AFM/POH and maintenance manual.

Only in the C90 trainer (18)

L GEN CONTACTOR
R GEN CONTACTOR
250 limiter – left
250 limiter – right
60 limiter – left gen bus to triple-fed
60 limiter – right gen bus to triple-fed
60 limiter – battery to triple-fed
LEFT GEN BUS TIE relay
RIGHT GEN BUS TIE relay
BATT. BUS TIE relay
GPU connection
HED – left (275)
HED – right (275)
HED – battery (275)
LSR
RSR
RCS (as labeled on Fig. 2-14, left side)
LCS (as labeled on Fig. 2-14, right side)

Only in the E90 trainer (26)

325 A current limiter – left
325 A current limiter – right
50 A CB – left main to fuel panel bus
50 A CB – right main to fuel panel bus
50 A CB – left main to No. 2 subpanel bus
50 A CB – right main to No. 2 subpanel bus
No. 1 INV CB (2 A)
No. 2 INV CB (2 A)
40 A limiter – No. 1 avionics bus
40 A limiter – No. 2 avionics bus
30 A CB – No. 1 avionics bus
30 A CB – No. 2 avionics bus
AVIONICS MASTER POWER CB (5 A)
Avionics master power relay – No. 1
Avionics master power relay – No. 2
External power relay
AVIONICS MASTER POWER switch
Reverse-current protection – left
Reverse-current protection – right
Diode – left fuel panel bus to No. 1 subpanel bus
Diode – right fuel panel bus to No. 1 subpanel bus
Diode – left main to No. 2 subpanel bus
Diode – right main to No. 2 subpanel bus
Starter relay – left
Starter relay – right
INVERTER selector

Modelled in both (3)

Battery relay (BATTERY switch) (E90: Battery relay (BAT switch))
L GEN SW. (GCU control) (E90: GEN 1 switch (left generator))
R GEN SW. (GCU control) (E90: GEN 2 switch (right generator))