Narrative:

Clearance delivery gave us the pikes departure alamosa transition climb maintain 10000 ft. During cockpit flows and checklists everything was set except the altitude on the mode control panel. This was not discovered until the incident. During climb out ATC says 'aircraft X, stop climb now.' we leveled off at 10700 ft. ATC asked 'what altitude are you climbing to?' I say '11000 ft.' ATC says 'maintain current altitude, traffic at 2 O'clock position, 12000 ft...direction of travel.' a few moments later, traffic was not a factor, climb and flight resumed normally. 11000 ft was set in the MCP presumably by the previous flight crew. Upon clearance I did not set 10000 ft in MCP. I believe fatigue was a factor. Arrived denver XA00 am (hotel) and departed at XS00 layover was sufficient, problem was my sleep patterns did not allow me enough rest. I do not bid or fly night trips. I also live in st louis, a different time zone, making the hotel arrival XB00 by my sleep patterns. Departure XT00 st louis time, my normal 'hit the sack' time. Other than fatigue, the factor I would give as much attention to would be the captain's non standard practices. He was non standard through all phases of flight, including preflight briefing and checklists. Our preflight briefing includes xchking clearance with MCP (altitude selector) and radios for navaids, radials, squawk, altitude, etc. This part of the preflight briefing was omitted, and I did not double-check my own work, missing the wrong altitude set in the MCP.

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Original NASA ASRS Text

Title: FLC OF A B737-300 OVERSHOT INTERMEDIATE CLB ALT DUE TO NOT SETTING THE ASSIGNED ALT IN THE FMC.

Narrative: CLRNC DELIVERY GAVE US THE PIKES DEP ALAMOSA TRANSITION CLB MAINTAIN 10000 FT. DURING COCKPIT FLOWS AND CHKLISTS EVERYTHING WAS SET EXCEPT THE ALT ON THE MODE CTL PANEL. THIS WAS NOT DISCOVERED UNTIL THE INCIDENT. DURING CLBOUT ATC SAYS 'ACFT X, STOP CLB NOW.' WE LEVELED OFF AT 10700 FT. ATC ASKED 'WHAT ALT ARE YOU CLBING TO?' I SAY '11000 FT.' ATC SAYS 'MAINTAIN CURRENT ALT, TFC AT 2 O'CLOCK POS, 12000 FT...DIRECTION OF TRAVEL.' A FEW MOMENTS LATER, TFC WAS NOT A FACTOR, CLB AND FLT RESUMED NORMALLY. 11000 FT WAS SET IN THE MCP PRESUMABLY BY THE PREVIOUS FLC. UPON CLRNC I DID NOT SET 10000 FT IN MCP. I BELIEVE FATIGUE WAS A FACTOR. ARRIVED DENVER XA00 AM (HOTEL) AND DEPARTED AT XS00 LAYOVER WAS SUFFICIENT, PROB WAS MY SLEEP PATTERNS DID NOT ALLOW ME ENOUGH REST. I DO NOT BID OR FLY NIGHT TRIPS. I ALSO LIVE IN ST LOUIS, A DIFFERENT TIME ZONE, MAKING THE HOTEL ARR XB00 BY MY SLEEP PATTERNS. DEP XT00 ST LOUIS TIME, MY NORMAL 'HIT THE SACK' TIME. OTHER THAN FATIGUE, THE FACTOR I WOULD GIVE AS MUCH ATTN TO WOULD BE THE CAPT'S NON STANDARD PRACTICES. HE WAS NON STANDARD THROUGH ALL PHASES OF FLT, INCLUDING PREFLT BRIEFING AND CHKLISTS. OUR PREFLT BRIEFING INCLUDES XCHKING CLRNC WITH MCP (ALT SELECTOR) AND RADIOS FOR NAVAIDS, RADIALS, SQUAWK, ALT, ETC. THIS PART OF THE PREFLT BRIEFING WAS OMITTED, AND I DID NOT DOUBLE-CHK MY OWN WORK, MISSING THE WRONG ALT SET IN THE MCP.

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.