Flight crew in CL60 failed to make a mandatory crossing while making an ILS approach into teb.

Attributes
ACN	454972
Time
Date	199911
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : dandy
State Reference	NJ
Altitude	msl single value : 1750
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : corporate
Make Model Name	Challenger CL601
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 06
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	454972
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 80 flight time total : 6500 flight time type : 400
ASRS Report	455649
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory none taken : insufficient time
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Being vectored for an ILS runway 6 circle-to-land runway 1 at teb, nj. New york approach control was ATC facility vectoring us to the approach. Instructions were to descend to 2000 ft, turn left to 080 degrees, join the localizer inbound. Next clearance was cleared for the ILS runway 6 approach. Since we were at 2000 ft, we decided to follow the GS downward. When crossing the dandy LOM at 1800 ft, the controller asked if we had an altitude assignment at dandy. I was the PNF (also PIC) and answered 'say again.' the question was restated and at that time I noticed on the approach plate that there is a mandatory crossing altitude at dandy of 1500 ft. We were at 1800 ft -- a bit below GS. The controller mentioned this was a mistake and he would file a complaint. Normally we are advised by ATC to cross a fix at a certain altitude. Today we misread the chart. The controller was obviously watching us but made no comment of our failure to start a quick descent to 1500 ft. He waited until we were at the fix. I had hoped we could work as a team, but not today. He made no comment of conflicting traffic. If we were going to conflict I wonder if he would have said nothing? I believe this could have been avoided by the controller by saying 'cross dandy at 1500 ft cleared for the ILS runway 6 approach' and a more thorough approach briefing on our part, even though the WX was clear.

Original NASA ASRS Text

Title: FLC IN CL60 FAILED TO MAKE A MANDATORY XING WHILE MAKING AN ILS APCH INTO TEB.

Narrative: BEING VECTORED FOR AN ILS RWY 6 CIRCLE-TO-LAND RWY 1 AT TEB, NJ. NEW YORK APCH CTL WAS ATC FACILITY VECTORING US TO THE APCH. INSTRUCTIONS WERE TO DSND TO 2000 FT, TURN L TO 080 DEGS, JOIN THE LOC INBOUND. NEXT CLRNC WAS CLRED FOR THE ILS RWY 6 APCH. SINCE WE WERE AT 2000 FT, WE DECIDED TO FOLLOW THE GS DOWNWARD. WHEN XING THE DANDY LOM AT 1800 FT, THE CTLR ASKED IF WE HAD AN ALT ASSIGNMENT AT DANDY. I WAS THE PNF (ALSO PIC) AND ANSWERED 'SAY AGAIN.' THE QUESTION WAS RESTATED AND AT THAT TIME I NOTICED ON THE APCH PLATE THAT THERE IS A MANDATORY XING ALT AT DANDY OF 1500 FT. WE WERE AT 1800 FT -- A BIT BELOW GS. THE CTLR MENTIONED THIS WAS A MISTAKE AND HE WOULD FILE A COMPLAINT. NORMALLY WE ARE ADVISED BY ATC TO CROSS A FIX AT A CERTAIN ALT. TODAY WE MISREAD THE CHART. THE CTLR WAS OBVIOUSLY WATCHING US BUT MADE NO COMMENT OF OUR FAILURE TO START A QUICK DSCNT TO 1500 FT. HE WAITED UNTIL WE WERE AT THE FIX. I HAD HOPED WE COULD WORK AS A TEAM, BUT NOT TODAY. HE MADE NO COMMENT OF CONFLICTING TFC. IF WE WERE GOING TO CONFLICT I WONDER IF HE WOULD HAVE SAID NOTHING? I BELIEVE THIS COULD HAVE BEEN AVOIDED BY THE CTLR BY SAYING 'CROSS DANDY AT 1500 FT CLRED FOR THE ILS RWY 6 APCH' AND A MORE THOROUGH APCH BRIEFING ON OUR PART, EVEN THOUGH THE WX WAS CLR.

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.