Crj-200 flight crew reported a loud noise on initial climb and elected to return to the departure ai...

Attributes
ACN	1715618
Time
Date	202001
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	AC Generation Indicating and Warning System
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

We initially had an issue with GPWS message when we switched power from external to APU. Circuit breaker popped an we called maintenance. They were able to fix the problem and reset the circuit breaker. After that all was normal until we rotated and got to about 100-200 ft off the ground and we started to hear a very loud noise while climbing. The captain checked the electric page and saw the air driven generator was deployed. We finished climbing out on the SID to 7;000 ft. Informed ATC of the situation and ran the QRH. We requested to return. We finished the flight without any other problems or incidents.

Original NASA ASRS Text

Title: CRJ-200 flight crew reported a loud noise on initial climb and elected to return to the departure airport.

Narrative: We initially had an issue with GPWS message when we switched power from external to APU. Circuit breaker popped an we called Maintenance. They were able to fix the problem and reset the circuit breaker. After that all was normal until we rotated and got to about 100-200 FT off the ground and we started to hear a very loud noise while climbing. The Captain checked the electric page and saw the ADG was deployed. We finished climbing out on the SID to 7;000 FT. Informed ATC of the situation and ran the QRH. We requested to return. We finished the flight without any other problems or incidents.

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.

Crj-200 flight crew reported a loud noise on initial climb and elected to return to the departure airport.