Narrative:

We received vectors for the ILS 6 for teb. We were told to maintain 2;000 ft until established and cleared for the ILS 6 approach. We were also told to maintain 180 KTS until 5 DME from the teb VOR. The pilot flying was flying the airplane trying to maintain the speed while I was told by the pilot flying to set the DME to show our distance from teb. We were then told to contact teb tower. The pilot flying told me his plan was to stay at 2;000 ft until the glideslope was alive and we would descend from 2;000 ft on the glideslope. I contacted tower and we were cleared to land on runway 6. The pilot flying then asked me which altitude we should be at when we crossed the LOM. I told him 1;284 ft and while looking (as the glideslope started movement) at that altitude we noticed that we had a mandatory altitude crossing of 1;500 ft at dandy (6.4 DME from teb). After seeing that the pilot flying then tried to descend to 1;500 ft before reaching dandy but it was too late. We crossed dandy at 1;800 ft and immediately received a transmission from tower that we had just violated a mandatory altitude and were told to descend to 1;500 ft. By the time the transmission was finished we were already level at 1;500 ft; however it was after dandy. Neither tower nor ground ever said anything further about the mistake. I believe the reason that this mistake was made was due to the high workload environment of the airspace. Both of us were busy with flying the airplane and talking to ATC that the proper approach briefing was not performed. We could have prevented this mistake by making a more thorough briefing of the approach and paying more attention to the altitudes listed on the profile view of the approach.

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Original NASA ASRS Text

Title: BE300 flight crew reports missing the mandatory altitude at DANDY during the ILS Runway 6 approach to TEB.

Narrative: We received vectors for the ILS 6 for TEB. We were told to maintain 2;000 FT until established and cleared for the ILS 6 approach. We were also told to maintain 180 KTS until 5 DME from the TEB VOR. The pilot flying was flying the airplane trying to maintain the speed while I was told by the pilot flying to set the DME to show our distance from TEB. We were then told to contact TEB Tower. The pilot flying told me his plan was to stay at 2;000 FT until the glideslope was alive and we would descend from 2;000 FT on the glideslope. I contacted Tower and we were cleared to land on Runway 6. The pilot flying then asked me which altitude we should be at when we crossed the LOM. I told him 1;284 FT and while looking (as the glideslope started movement) at that altitude we noticed that we had a mandatory altitude crossing of 1;500 FT at DANDY (6.4 DME from TEB). After seeing that the pilot flying then tried to descend to 1;500 FT before reaching DANDY but it was too late. We crossed DANDY at 1;800 FT and immediately received a transmission from Tower that we had just violated a mandatory altitude and were told to descend to 1;500 FT. By the time the transmission was finished we were already level at 1;500 FT; however it was after DANDY. Neither Tower nor Ground ever said anything further about the mistake. I believe the reason that this mistake was made was due to the high workload environment of the airspace. Both of us were busy with flying the airplane and talking to ATC that the proper approach briefing was not performed. We could have prevented this mistake by making a more thorough briefing of the approach and paying more attention to the altitudes listed on the profile view of the approach.

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.