A corporate cl-60 captain expressed confusion over frequent approach clearances for the ILS or local...

Narrative:

Flying from the west at 2000 ft MSL on radar vectors for teterboro airport; we were cleared upon intercept [for] the ILS 06 between vings and dandy. On most airplanes; when pilots are cleared for a precision approach; select appr mode on the fgp (flight guidance panel). Its seems that even if you are cleared for the ILS on this approach you must descend below the glidepath to make the restriction of 1500 ft at dandy even if cleared the ILS and have captured the glideslope. Fgp protocol is much different in this case. After discussion with many pilots who have been to teterboro; all have been caught in this same predicament in the past. If this is the case and confusion exists why not clear pilots to 'track localizer inbound; descend to 1500 ft and upon reaching dandy cleared for the ILS 06?' in this case no confusion exists. This seems to be an old problem and still claims many victims among those that rarely go to teterboro.

Original NASA ASRS Text

Title: A corporate CL-60 Captain expressed confusion over frequent approach clearances for the ILS or LOC RWY 6 approach at TEB which do not include specific language clarifying the need to comply with the below glideslope crossing of DANDY at 1;500 FT MSL.

Narrative: Flying from the west at 2000 FT MSL on radar vectors for Teterboro airport; we were cleared upon intercept [for] the ILS 06 between VINGS and DANDY. On most airplanes; when pilots are cleared for a precision approach; select APPR mode on the FGP (flight guidance panel). Its seems that even if you are cleared for the ILS on this approach you must descend below the glidepath to make the restriction of 1500 FT at DANDY even if cleared the ILS and have captured the glideslope. FGP protocol is much different in this case. After discussion with many pilots who have been to Teterboro; all have been caught in this same predicament in the past. If this is the case and confusion exists why not clear pilots to 'track localizer inbound; descend to 1500 FT and upon reaching DANDY cleared for the ILS 06?' In this case no confusion exists. This seems to be an old problem and still claims many victims among those that rarely go to Teterboro.

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.

Attributes
ACN	1202100
Time
Date	201409
Local Time Of Day	1801-2400
Place
Locale Reference	TEB.Airport
State Reference	NJ
Environment
Light	Night
Aircraft 1
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 52 Flight Crew Total 7528 Flight Crew Type 2720
Events
Anomaly	ATC Issue All Types

A corporate cl-60 captain expressed confusion over frequent approach clearances for the ILS or localizer runway 6 approach at teb which do not include specific language clarifying the need to comply with the below glideslope crossing of dandy at 1;500 ft MSL.