Cl-650 flight crew reported accidentally deploying the air driven generator.

Attributes
ACN	1725130
Time
Date	202002
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Challenger 650
Operating Under FAR Part	Part 135
Flight Phase	Climb Takeoff
Flight Plan	IFR
Component
Aircraft Component	APU
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

During the after takeoff check my finger got jammed between the APU and right generators. This resulted in turning both generators off. Alarmed; I had a reflex action and spontaneously tuned the left generator off. This happened without any thought and I don't know why I did this. These actions resulted in deployment of the air driven generator (air driven generator). After deployment; I reset all three generators on and transferred emergency bus power back to the left generator. With power restored; we executed the ILS xxr approach; taxied and parked.

Original NASA ASRS Text

Title: CL-650 flight crew reported accidentally deploying the Air Driven Generator.

Narrative: During the after takeoff check my finger got jammed between the APU and right generators. This resulted in turning both generators off. Alarmed; I had a reflex action and spontaneously tuned the left generator off. This happened without any thought and I don't know why I did this. These actions resulted in deployment of the ADG (Air Driven Generator). After deployment; I reset all three generators on and transferred emergency bus power back to the left generator. With power restored; we executed the ILS XXR approach; taxied and parked.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.