Narrative:

Woke up at xa:05 (central) for a xa:45 van for xb:30 show after a night of getting to bed at yb:00 only to listen to jack hammers in front of hotel through xd:00. Also suffering from affects of tooth extraction 3 days prior (aspirin used). Incident occurred on last leg at xl:00 (central) PNF, first officer, had gone off ATC to get ATIS. We were cleared to 9000 were descending through 11000'. I rogered for it. I didn't reset altitude alert, don't know why. When first officer came back the alert went off. He jumped. I said 'it's ok, we're cleared to 7000''. He reset altitude alert to 7000. Passing 8500 approach control asked our altitude. We said 8200. He said we were cleared to 9000. Nothing more said. No excuses but this was fatigue physiologically caused, I probably should not have flown the 3 day anyway but once on it, short of fever or other debilitating condition I was bound to fly the sequence. Bad judgement, fatigued, complacency routine, lack of discipline which comes first? I make it a practice in my cockpit that both of us ask what has transpired while the other was off ATC. The first officer did his job. I had no doubt it was 7000. (It normally is) so we whistled through 9000. Callback conversation with reporter revealed the following: reporter participated in the boeing study. Made the comment the incident probably happened because of anticipating the normal clearance to 7000. Felt separation was probably lost.

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Original NASA ASRS Text

Title: ALT OVERSHOT ON DESCENT.

Narrative: WOKE UP AT XA:05 (CENTRAL) FOR A XA:45 VAN FOR XB:30 SHOW AFTER A NIGHT OF GETTING TO BED AT YB:00 ONLY TO LISTEN TO JACK HAMMERS IN FRONT OF HOTEL THROUGH XD:00. ALSO SUFFERING FROM AFFECTS OF TOOTH EXTRACTION 3 DAYS PRIOR (ASPIRIN USED). INCIDENT OCCURRED ON LAST LEG AT XL:00 (CENTRAL) PNF, F/O, HAD GONE OFF ATC TO GET ATIS. WE WERE CLRED TO 9000 WERE DSNDING THROUGH 11000'. I ROGERED FOR IT. I DIDN'T RESET ALT ALERT, DON'T KNOW WHY. WHEN F/O CAME BACK THE ALERT WENT OFF. HE JUMPED. I SAID 'IT'S OK, WE'RE CLRED TO 7000''. HE RESET ALT ALERT TO 7000. PASSING 8500 APCH CTL ASKED OUR ALT. WE SAID 8200. HE SAID WE WERE CLRED TO 9000. NOTHING MORE SAID. NO EXCUSES BUT THIS WAS FATIGUE PHYSIOLOGICALLY CAUSED, I PROBABLY SHOULD NOT HAVE FLOWN THE 3 DAY ANYWAY BUT ONCE ON IT, SHORT OF FEVER OR OTHER DEBILITATING CONDITION I WAS BOUND TO FLY THE SEQUENCE. BAD JUDGEMENT, FATIGUED, COMPLACENCY ROUTINE, LACK OF DISCIPLINE WHICH COMES FIRST? I MAKE IT A PRACTICE IN MY COCKPIT THAT BOTH OF US ASK WHAT HAS TRANSPIRED WHILE THE OTHER WAS OFF ATC. THE F/O DID HIS JOB. I HAD NO DOUBT IT WAS 7000. (IT NORMALLY IS) SO WE WHISTLED THROUGH 9000. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR PARTICIPATED IN THE BOEING STUDY. MADE THE COMMENT THE INCIDENT PROBABLY HAPPENED BECAUSE OF ANTICIPATING THE NORMAL CLRNC TO 7000. FELT SEPARATION WAS PROBABLY LOST.

Data retrieved from NASA's ASRS site as of July 2007 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.