Narrative:

During approach to runway 18C; the first officer (who was flying) called for flaps 45 degrees and before landing checklist. The checklist was verbalized as required; but the flaps were still at 30 degrees extension. Neither of us caught the fact that the flaps were at the wrong setting. On short final the GPWS annunciated; 'too low flaps' and we decided that the best course of action was to go around. As it was my job as the PNF to put the flaps down; I was certain I had done so. It is quite possible that I started to and got distraction. As for completing the before landing checklist; we did verbalize it using challenge and response; but I think we just saw what we wanted/expected to see. A contributing factor to this event was being tired. This trip had 3 consecutive early reports; including an XA45 wake-up on day #2; XB15 on the event date. On top of that; the event date also included 2 long breaks; including 1 before the flight and 1 we were anticipating after the flight. In short; we were sort of robotic and tired; and we wanted to finish the day. Supplemental information fro acn 687663: I even called scheduling and spoke to a supervisor at XA45 and again at XB30 asking him to take me off the rest of the trip because I was so exhausted. He tried to work that out; but said we were short staffed. I told him I wasn't going to call in sick (because I wasn't sick) and I told him that I wouldn't call in fatigued because they didn't have the staffing. All of my trips during the month had much later report times; so I wasn't used to getting up so early and wasn't able to fall asleep early. In hindsight; I feel that I should have called in fatigued instead of fighting the exhaustion.

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Original NASA ASRS Text

Title: CRJ200 FLT CREW EXECUTES GAR WHEN GPWS ALERTS THEM TO IMPROPER ACFT CONFIGN.

Narrative: DURING APCH TO RWY 18C; THE FO (WHO WAS FLYING) CALLED FOR FLAPS 45 DEGS AND BEFORE LNDG CHKLIST. THE CHKLIST WAS VERBALIZED AS REQUIRED; BUT THE FLAPS WERE STILL AT 30 DEGS EXTENSION. NEITHER OF US CAUGHT THE FACT THAT THE FLAPS WERE AT THE WRONG SETTING. ON SHORT FINAL THE GPWS ANNUNCIATED; 'TOO LOW FLAPS' AND WE DECIDED THAT THE BEST COURSE OF ACTION WAS TO GO AROUND. AS IT WAS MY JOB AS THE PNF TO PUT THE FLAPS DOWN; I WAS CERTAIN I HAD DONE SO. IT IS QUITE POSSIBLE THAT I STARTED TO AND GOT DISTR. AS FOR COMPLETING THE BEFORE LNDG CHKLIST; WE DID VERBALIZE IT USING CHALLENGE AND RESPONSE; BUT I THINK WE JUST SAW WHAT WE WANTED/EXPECTED TO SEE. A CONTRIBUTING FACTOR TO THIS EVENT WAS BEING TIRED. THIS TRIP HAD 3 CONSECUTIVE EARLY RPTS; INCLUDING AN XA45 WAKE-UP ON DAY #2; XB15 ON THE EVENT DATE. ON TOP OF THAT; THE EVENT DATE ALSO INCLUDED 2 LONG BREAKS; INCLUDING 1 BEFORE THE FLT AND 1 WE WERE ANTICIPATING AFTER THE FLT. IN SHORT; WE WERE SORT OF ROBOTIC AND TIRED; AND WE WANTED TO FINISH THE DAY. SUPPLEMENTAL INFO FRO ACN 687663: I EVEN CALLED SCHEDULING AND SPOKE TO A SUPVR AT XA45 AND AGAIN AT XB30 ASKING HIM TO TAKE ME OFF THE REST OF THE TRIP BECAUSE I WAS SO EXHAUSTED. HE TRIED TO WORK THAT OUT; BUT SAID WE WERE SHORT STAFFED. I TOLD HIM I WASN'T GOING TO CALL IN SICK (BECAUSE I WASN'T SICK) AND I TOLD HIM THAT I WOULDN'T CALL IN FATIGUED BECAUSE THEY DIDN'T HAVE THE STAFFING. ALL OF MY TRIPS DURING THE MONTH HAD MUCH LATER RPT TIMES; SO I WASN'T USED TO GETTING UP SO EARLY AND WASN'T ABLE TO FALL ASLEEP EARLY. IN HINDSIGHT; I FEEL THAT I SHOULD HAVE CALLED IN FATIGUED INSTEAD OF FIGHTING THE EXHAUSTION.

Data retrieved from NASA's ASRS site as of January 2009 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.