Electrical

Question 1

1) AFCS pitch and roll channels disengaged
2) Pilot and copilot ADIs failed
3) Loss of cockpit instrument lighting
4) Loss of all AC powered equipment

Answer 1

Dual AC Bus Failure (“D specific,” pg 207-210)

1) Flight controls - stabilize aircraft
2) Cool switch - off
more non-memory…

Question 2

1) One 26VAC FAIL light illuminated
2) AFCS pitch, roll, yaw channels disengaged
3) ADI failed on one side of the instrument panel
4) All equipment on one main AC bus inoperative and/or loss of components powered by single phase 115 VAC and 26VAC from the respective transformer
5) Alternator FAIL light illuminated (in some cases)
6) BTC CLOSED light illuminated (in some cases)

Answer 2

AC System Failure (Main AC Bus Short, Alternator, Alternator Control Unit (ACU), or 115/26 VAC System Failure) (“D specific,” pg 210-212)

1) Flight controls - stabilize aircraft
2) 26 VAC XFER switch - move in the direction of the illuminated fail light
3) AFCS - reengage
4) If ECS failed - cool switch off
5) Land as soon as practicable

Question 3

1) Loss of all equipment on one main DC bus to include, but not limited to: (a lot of stuff)
2) See EGI FAILURE EP for additional symptoms due to loss of an EGI
3) SERVO JAM, SEC HYD ISOLATE, and HEATER O/HEAT warning lights illuminated (no 2 bus only). Landing gear system will have hydraulic power and will extend normally with landing gear handle activation.
4) Loss of radar display on MFD 2 (no 2 only)
5) Associated generator FAIL light illuminated
6) Associated battery relay OPEN light illuminated

Answer 3

Main DC Bus Short (“D specific,” pg 212-215)

1) Flight controls - stabilize aircraft
2) AFCS gyro selector switch - move in the direction of the operating EGI
3) AFCS pitch and roll - reengage
4) Affected audio control panels - ALTN
5) NAV control - transfer as required
6) Boost pumps - all on
7) Affected generator - off
8) Affected battery relay switch - off
9) Land as soon as practicable

Question 4

1) Generator FAIL light illuminated

2) BTC CLOSED light illuminated

Answer 4

Generator Failure (“Electrical,” pg 88-89)

1) Generator - off, reset
If problem persists:
2) Affected generator - off
3) Volt/loadmeter - monitor
4) Land as soon as practicable

Question 5

1) BATT TEMP warning light illuminated
2) Smoke and/or fumes from radome or vent
3) Noises from radome

Answer 5

Battery Overtemperature/Thermal Runaway (“Electrical,” pg 89-90)

1) BATT RELAY switches - both off (to prevent the battery from receiving further charge)
2) Land as soon as practicable
etc

Question 6

1) Both BATT RELAY OPEN lights illuminated

Answer 6

Battery Bus Short Circuit (“Electrical,” pg 91-92)

1) Confirm both batt relay switches - on
2) Batt temp warning light - monitor
3) Land as soon as practicable

Question 7

1) One BATT RLY OPEN light illuminated

Answer 7

Battery Relay Failure (“Electrical,” pg 92)

1) Continue flight as appropriate