Crj-200 flight crew reported a loud noise and a stall fail caution message on takeoff; resulting in ...

Narrative:

Immediately after rotation a loud buzzing noise started from outside the cockpit on the nose of the aircraft and we received a stall fail caution message. The noise became louder as we increased airspeed and at around 200 KIAS it was almost deafening. We decided to not speed up any more and we leveled off and advised ATC. Then the captain transferred the flight controls to me while he complied with the QRH for the stall fail caution message. The buzzing continued and we were worried that something essential like the aoa vane was vibrating loose and could cause damage to the aircraft. That; combined with the reduced stall protection and the distraction from the noise led us to decide to return to field and not continue the flight. Since the situation was under control and we were in no immediate danger we did not request priority handling; however ATC gave us priority for us. We burned off fuel until we were below max landing weight; complied with all checklists; and returned to the departure airport without any further problems. After returning to the gate; I went outside to look at the front of the aircraft and found that the oxygen service panel was open. The open door of this panel was in line with the pitot tube and aoa vane which might have caused the stall fail message. At this point I remembered seeing this door open during my preflight; however at the time I paid no attention to it because I thought it was one off the many doors that the ground crew opens and closes during their preparation of the aircraft. I should have looked more closely at the panel; because if I had noticed that it was the oxygen service panel I would've known that it's not one the ground crew uses and I could've closed it myself.maintenance left the oxygen service panel open when they serviced it the night before. Neither I; the ground crew; nor the deice personnel noticed it open and closed it before takeoff.provide guidance to pilots as to which panels are routinely opened and which are not; and who is responsible for closing which panels.

Original NASA ASRS Text

Title: CRJ-200 flight crew reported a loud noise and a STALL FAIL caution message on takeoff; resulting in a return to departure airport caused by the crew O2 service door being unsecured.

Narrative: Immediately after rotation a loud buzzing noise started from outside the cockpit on the nose of the aircraft and we received a stall fail caution message. The noise became louder as we increased airspeed and at around 200 KIAS it was almost deafening. We decided to not speed up any more and we leveled off and advised ATC. Then the Captain transferred the flight controls to me while he complied with the QRH for the stall fail caution message. The buzzing continued and we were worried that something essential like the AOA vane was vibrating loose and could cause damage to the aircraft. That; combined with the reduced stall protection and the distraction from the noise led us to decide to return to field and not continue the flight. Since the situation was under control and we were in no immediate danger we did not request priority handling; however ATC gave us priority for us. We burned off fuel until we were below max landing weight; complied with all checklists; and returned to the departure airport without any further problems. After returning to the gate; I went outside to look at the front of the aircraft and found that the oxygen service panel was open. The open door of this panel was in line with the pitot tube and AOA vane which might have caused the stall fail message. At this point I remembered seeing this door open during my preflight; however at the time I paid no attention to it because I thought it was one off the many doors that the ground crew opens and closes during their preparation of the aircraft. I should have looked more closely at the panel; because if I had noticed that it was the oxygen service panel I would've known that it's not one the ground crew uses and I could've closed it myself.Maintenance left the oxygen service panel open when they serviced it the night before. Neither I; the ground crew; nor the deice personnel noticed it open and closed it before takeoff.Provide guidance to pilots as to which panels are routinely opened and which are not; and who is responsible for closing which panels.

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.

Attributes
ACN	1712091
Time
Date	201912
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Service/Access Door
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Crj-200 flight crew reported a loud noise and a stall fail caution message on takeoff; resulting in a return to departure airport caused by the crew O2 service door being unsecured.