Narrative:

Setting up for the approach we were cleared to descend to 2;000 feet and given a right turn of 270 degrees heading to intercept the course for RNAV 30R and cleared for the approach. Approach gave us a vector and cut the final corner. We were given an intercept heading of 270 degrees that would have put us established between fix X and fix Y on the RNAV 30R. The captain called for direct fix X and asked the fist officer (first officer) to clear the turn point since we were on radar vectors to final well inside of fix X.fixy was set in the FMS as +2;000 feet. The captain was established on the intercept heading of 270 degrees inbound between fix X and fix Y; he then armed navigation. While still descending to 2;000 feet in V/south mode; the captain asked the first officer to set min alt of 461 feet in the altitude window. Prof was not re-engaged at that point; so the aircraft did not level off at 2;000 feet as was required to cross fix Y. The aircraft continued down. When the enhanced ground proximity warning system (egpws) went off for the gear; 'to low gear' we realized that the aircraft had not leveled off as programed because we were not in prof mode; we climbed back up to 2;000 feet. At this point we were approximately 16 miles from the end of the runway. We reset the altitude; verified the box and continued the approach to a normal RNAV to 30R and landing without further incident.

Google
 

Original NASA ASRS Text

Title: An MD-11F air crew descended below the published altitude for an intermediate fix on final approach and received the 'TOO LOW GEAR' warning. They climbed back to the appropriate altitude; continued the approach and landed.

Narrative: Setting up for the approach we were cleared to descend to 2;000 feet and given a right turn of 270 degrees heading to intercept the course for RNAV 30R and cleared for the approach. Approach gave us a vector and cut the final corner. We were given an intercept heading of 270 degrees that would have put us established between Fix X and Fix Y on the RNAV 30R. The Captain called for direct Fix X and asked the Fist Officer (FO) to clear the turn point since we were on radar vectors to final well inside of Fix X.FixY was set in the FMS AS +2;000 feet. The Captain was established on the intercept heading of 270 degrees inbound between Fix X and Fix Y; he then armed NAV. While still descending to 2;000 feet in V/S mode; the Captain asked the FO to set min alt of 461 feet in the altitude window. Prof was not re-engaged at that point; so the aircraft did not level off at 2;000 feet as was required to cross Fix Y. The aircraft continued down. When the Enhanced Ground Proximity Warning System (EGPWS) went off for the gear; 'To low Gear' we realized that the aircraft had not leveled off as programed because we were not in Prof Mode; we climbed back up to 2;000 feet. At this point we were approximately 16 miles from the end of the runway. We reset the altitude; verified the box and continued the approach to a normal RNAV to 30R and landing without further incident.

Data retrieved from NASA's ASRS site 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.