Narrative:

I was being vectored for the ILS runway 18R to mco and within 10 miles of the airport we were asked to switch to runway 17L. Approach clearance was to maintain 3000 ft until established cleared ILS runway 17L. Once established on the ILS runway 17L we mistakenly put in the FAF altitude of 1500 ft instead of 2500 ft until seedo. We descended to 2100 ft before we realized the correct altitude and started to climb back to 2500 ft. At this point we received a TA for aircraft at executive airport at minus 800 ft; and a call from mco tower to climb to 2500 ft until seedo. The rest of the approach was uneventful. We were asked to call the tower by ground control. Time was compressed; a more thorough review of charts; maybe more specific controller instructions.

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Original NASA ASRS Text

Title: A B737 CREW RPTS A CLOSE-IN RWY CHANGE FROM MCO RWY 18R TO 17L. THE ACFT DSNDED BELOW THE RWY 17L FAF ALT AND RECEIVED A TA AFTER AN ERROR IN THE FAF MCP ALT.

Narrative: I WAS BEING VECTORED FOR THE ILS RWY 18R TO MCO AND WITHIN 10 MILES OF THE ARPT WE WERE ASKED TO SWITCH TO RWY 17L. APCH CLRNC WAS TO MAINTAIN 3000 FT UNTIL ESTABLISHED CLRED ILS RWY 17L. ONCE ESTABLISHED ON THE ILS RWY 17L WE MISTAKENLY PUT IN THE FAF ALTITUDE OF 1500 FT INSTEAD OF 2500 FT UNTIL SEEDO. WE DSNDED TO 2100 FT BEFORE WE REALIZED THE CORRECT ALTITUDE AND STARTED TO CLB BACK TO 2500 FT. AT THIS POINT WE RECEIVED A TA FOR ACFT AT EXECUTIVE ARPT AT MINUS 800 FT; AND A CALL FROM MCO TOWER TO CLB TO 2500 FT UNTIL SEEDO. THE REST OF THE APCH WAS UNEVENTFUL. WE WERE ASKED TO CALL THE TOWER BY GND CTL. TIME WAS COMPRESSED; A MORE THOROUGH REVIEW OF CHARTS; MAYBE MORE SPECIFIC CTLR INSTRUCTIONS.

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.