Narrative:

While transition from vectors to visual approach clearance, momentary confusion of VNAV/LNAV caused descent to MVA. Approach brought to our attention, leveled, no further conflicts.

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Original NASA ASRS Text

Title: B737-800 CREW HAD AN ALTDEV IN MSP CLASS B AIRSPACE AFTER THE CREW DID NOT OPERATE THE FMC AND ALT ALERT PROPERLY.

Narrative: WHILE TRANSITION FROM VECTORS TO VISUAL APCH CLRNC, MOMENTARY CONFUSION OF VNAV/LNAV CAUSED DSCNT TO MVA. APCH BROUGHT TO OUR ATTN, LEVELED, NO FURTHER CONFLICTS.

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.