Narrative:

On the VOR/DME GPS runway 36L approach to new orleans; la (new) the step down altitude between cupro and imial is 680 feet MSL. We went below this altitude on the approach to new. The controller gave us an altitude alert. On the approach the FMS did not have imial in the data base; but is on the approach plate. The co-pilot was to set the altitude on each step down fix. After we passed cudro (FAF); he gave me and set the MDA altitude of 480 feet MSL not the step down fix at this point; so I was descending to MDA 480 feet MSL not the 680 feet MSL step down fix altitude.

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Original NASA ASRS Text

Title: While shooting the VOR/DME IAP to Runway 36L at NEW the flight crew of a light transport turboprop failed to comply with the crossing restriction at IMIAL.

Narrative: On the VOR/DME GPS Runway 36L approach to New Orleans; LA (NEW) the step down altitude between CUPRO and IMIAL is 680 feet MSL. We went below this altitude on the approach to NEW. The Controller gave us an altitude alert. On the approach the FMS did not have IMIAL in the data base; but is on the approach plate. The co-pilot was to set the altitude on each step down fix. After we passed CUDRO (FAF); he gave me and set the MDA altitude of 480 feet MSL not the step down fix at this point; so I was descending to MDA 480 feet MSL not the 680 feet MSL step down fix altitude.

Data retrieved from NASA's ASRS site as of April 2012 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.