Narrative:

We were doing the ILS runway 6 to teb. Prior to the start of the approach, the PNF (also a captain-qualified pilot on the aircraft) briefed the approach from our single approach plate. When he completed his briefing, I (the PF) looked over the chart to verify the ILS frequency, inbound course, and decision altitude. We were given a heading to intercept the inbound course, told to maintain 2000 ft until established, and cleared for the approach by the controller. Some time after we established on the course, the controller came back and asked us to descend to the 'step-down altitude of 1500 ft.' most of the time during that descent to 1500 ft, we were not much below the GS. After landing, I reviewed the approach plate and discovered that there was a 'mandatory altitude' of 1500 ft by approximately 6.3 DME teb on this ILS. Going over the approach in my mind and comparing it to the chart led me to believe it was highly unlikely that we were at 1500 ft by the specified point on the approach. The controller never said anything other than his request that we descend to 1500 ft. I believe this problem arose due to the PNF missing the mandatory altitude on the approach briefing, along with the PF's failure to discover it during the quick 'review' of the frequency, inbound course, and descent altitude. Other minor factors were night (low light in the cockpit for reading), and the usual busy new york airspace. From now on, I will be doing a full review of the approach plate myself, even if it is another captain giving the briefing.

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Original NASA ASRS Text

Title: ALT XING RESTR NOT ADHERED TO BY THE FLT CREW OF A C560 FLT ON THE ILS RWY 6 AT TEB, NJ.

Narrative: WE WERE DOING THE ILS RWY 6 TO TEB. PRIOR TO THE START OF THE APCH, THE PNF (ALSO A CAPT-QUALIFIED PLT ON THE ACFT) BRIEFED THE APCH FROM OUR SINGLE APCH PLATE. WHEN HE COMPLETED HIS BRIEFING, I (THE PF) LOOKED OVER THE CHART TO VERIFY THE ILS FREQ, INBOUND COURSE, AND DECISION ALT. WE WERE GIVEN A HDG TO INTERCEPT THE INBOUND COURSE, TOLD TO MAINTAIN 2000 FT UNTIL ESTABLISHED, AND CLRED FOR THE APCH BY THE CTLR. SOME TIME AFTER WE ESTABLISHED ON THE COURSE, THE CTLR CAME BACK AND ASKED US TO DSND TO THE 'STEP-DOWN ALT OF 1500 FT.' MOST OF THE TIME DURING THAT DSCNT TO 1500 FT, WE WERE NOT MUCH BELOW THE GS. AFTER LNDG, I REVIEWED THE APCH PLATE AND DISCOVERED THAT THERE WAS A 'MANDATORY ALT' OF 1500 FT BY APPROX 6.3 DME TEB ON THIS ILS. GOING OVER THE APCH IN MY MIND AND COMPARING IT TO THE CHART LED ME TO BELIEVE IT WAS HIGHLY UNLIKELY THAT WE WERE AT 1500 FT BY THE SPECIFIED POINT ON THE APCH. THE CTLR NEVER SAID ANYTHING OTHER THAN HIS REQUEST THAT WE DSND TO 1500 FT. I BELIEVE THIS PROB AROSE DUE TO THE PNF MISSING THE MANDATORY ALT ON THE APCH BRIEFING, ALONG WITH THE PF'S FAILURE TO DISCOVER IT DURING THE QUICK 'REVIEW' OF THE FREQ, INBOUND COURSE, AND DSCNT ALT. OTHER MINOR FACTORS WERE NIGHT (LOW LIGHT IN THE COCKPIT FOR READING), AND THE USUAL BUSY NEW YORK AIRSPACE. FROM NOW ON, I WILL BE DOING A FULL REVIEW OF THE APCH PLATE MYSELF, EVEN IF IT IS ANOTHER CAPT GIVING THE BRIEFING.

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.