Narrative:

During base to final turn; first officer indicated that he wanted flaps 2 degrees extended by holding out 2 fingers. Normally; before extending flaps; I always xchk the airspeed indicator to ensure we are below the appropriate extension speeds; but for some reason this time I didn't. I extended the flaps to position #2 and immediately realized that we were too fast for position #2; so I returned the handle immediately to position #1. I'm not sure how much the flaps extended beyond position #1; but we did get a flap overspd warning that lasted 2 seconds. We were at 205 KIAS at the time which was a 5 KT overspd. Remainder of approach was uneventful. On ground; we entered a maintenance write-up and briefed the mechanics that we had a 5 KT flaps 2 degree overspd for 2 seconds. They performed the required inspection. I believe that fatigue was contributing factor to this minor incident. We had a very late night before this flight as we arrived in oak at XA30 (home time) and I was unable to get to sleep until XC00. At XG30 I could not sleep any longer since my body clock is not used to sleeping so late through the day. This resulted in only 5.5 hours of sleep for me after a 12 hour duty day. Looking back now; the signs of fatigue were very subtle; yet present. During the flight I had difficulty remembering our flight number while performing the radio work and my failure to not xchk the airspeed while extending flaps was also out of the norm for me.

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Original NASA ASRS Text

Title: A319 FLT CREW OVERSPD THE FLAPS DURING APCH TO ORD.

Narrative: DURING BASE TO FINAL TURN; FO INDICATED THAT HE WANTED FLAPS 2 DEGS EXTENDED BY HOLDING OUT 2 FINGERS. NORMALLY; BEFORE EXTENDING FLAPS; I ALWAYS XCHK THE AIRSPD INDICATOR TO ENSURE WE ARE BELOW THE APPROPRIATE EXTENSION SPDS; BUT FOR SOME REASON THIS TIME I DIDN'T. I EXTENDED THE FLAPS TO POS #2 AND IMMEDIATELY REALIZED THAT WE WERE TOO FAST FOR POS #2; SO I RETURNED THE HANDLE IMMEDIATELY TO POS #1. I'M NOT SURE HOW MUCH THE FLAPS EXTENDED BEYOND POS #1; BUT WE DID GET A FLAP OVERSPD WARNING THAT LASTED 2 SECONDS. WE WERE AT 205 KIAS AT THE TIME WHICH WAS A 5 KT OVERSPD. REMAINDER OF APCH WAS UNEVENTFUL. ON GND; WE ENTERED A MAINT WRITE-UP AND BRIEFED THE MECHS THAT WE HAD A 5 KT FLAPS 2 DEG OVERSPD FOR 2 SECONDS. THEY PERFORMED THE REQUIRED INSPECTION. I BELIEVE THAT FATIGUE WAS CONTRIBUTING FACTOR TO THIS MINOR INCIDENT. WE HAD A VERY LATE NIGHT BEFORE THIS FLT AS WE ARRIVED IN OAK AT XA30 (HOME TIME) AND I WAS UNABLE TO GET TO SLEEP UNTIL XC00. AT XG30 I COULD NOT SLEEP ANY LONGER SINCE MY BODY CLOCK IS NOT USED TO SLEEPING SO LATE THROUGH THE DAY. THIS RESULTED IN ONLY 5.5 HRS OF SLEEP FOR ME AFTER A 12 HR DUTY DAY. LOOKING BACK NOW; THE SIGNS OF FATIGUE WERE VERY SUBTLE; YET PRESENT. DURING THE FLT I HAD DIFFICULTY REMEMBERING OUR FLT NUMBER WHILE PERFORMING THE RADIO WORK AND MY FAILURE TO NOT XCHK THE AIRSPD WHILE EXTENDING FLAPS WAS ALSO OUT OF THE NORM FOR ME.

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.