Crj-200 first officer reports departing with flaps set to 8 when flaps 20 was required for takeoff p...

Narrative:

It was my leg. Flaps were supposed to be 20. Take off roll seemed a little long; but not scary long. Rotation was smooth and normal; climb rate seemed fine as well. At fra (flap retraction altitude) I called for 'flaps 8'. The captain said 'uh there at 8 now'. At that point we realized that we had not set them to 20 for takeoff. We continued the flight without incident.the terrain surrounding this airport was well known to us. We briefed that climb out was to be at vt until MEA of 5;700 ft. The error was not catching the flaps set at 8 instead of 20. We had at least three chances.from now on; I will not just reach over and click the flaps. I'll look at them and make sure the lever is where it's supposed to be. I print of the data so I can read it for the performance check; rather than just keep my head down and read I'll verify what's been set while the captain does his call outs. And on the before takeoff; I'll check all the data again quickly; rather than just visually verify 'T/O config ok' on the EICAS.

Original NASA ASRS Text

Title: CRJ-200 First Officer reports departing with flaps set to 8 when flaps 20 was required for takeoff performance. The error is not detected until the First Officer calls for flaps 8 after takeoff and the Captain reports they are already at 8.

Narrative: It was my leg. Flaps were supposed to be 20. Take off roll seemed a little long; but not scary long. Rotation was smooth and normal; climb rate seemed fine as well. At FRA (Flap Retraction Altitude) I called for 'flaps 8'. The Captain said 'uh there at 8 now'. At that point we realized that we had not set them to 20 for takeoff. We continued the flight without incident.The terrain surrounding this airport was well known to us. We briefed that climb out was to be at VT until MEA of 5;700 ft. The error was not catching the flaps set at 8 instead of 20. We had at least three chances.From now on; I will not just reach over and click the flaps. I'll look at them and make sure the lever is where it's supposed to be. I print of the data so I can read it for the performance check; rather than just keep my head down and read I'll verify what's been set while the Captain does his call outs. And on the before takeoff; I'll check all the data again quickly; rather than just visually verify 'T/O config ok' on the EICAS.

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	1293295
Time
Date	201509
Local Time Of Day	1801-2400
Place
Locale Reference	ROA.Airport
State Reference	VA
Environment
Light	Dusk
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	Flap/Slat Control System
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

Crj-200 first officer reports departing with flaps set to 8 when flaps 20 was required for takeoff performance. The error is not detected until the first officer calls for flaps 8 after takeoff and the captain reports they are already at 8.