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Falcon 2000 captain experiences a TCAS RA at 2;000 feet during vectors to the ILS 19 at teb. The RA is complied with and the intruder passes below at 1;900 feet. N90 had issued a turn to intercept the ILS; which was also a turn into the traffic and was pointed out. Class B airspace above compresses VFR traffic into the approach path for teb.
| Attributes | |
| ACN | 1218863 |
| Time | |
| Date | 201411 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | TEB.Airport |
| State Reference | NY |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | Falcon 2000 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Engineer Flight Crew Flight Instructor Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 83 Flight Crew Total 12609 Flight Crew Type 1093 |
| Events | |
| Anomaly | Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude |
| Miss Distance | Horizontal 5000 Vertical 500 |
Narrative:
While being vectored to the ILS 19 final approach course in VMC at an assigned altitude of 2000 feet; ny TRACON issued the following clearance: 'turn right heading 165; maintain 2000 feet until established; cleared ILS 19.' we acknowledged the clearance; when ATC called out traffic at 2 o'clock; 2 miles; altitude indicates 1900 feet. We then experienced a TCAS traffic alert. As we were in the right turn; I asked the controller if he still wished us to turn to heading 165. He instructed us to maintain present heading; and then paused as if uncertain as to what instruction to issue. We experienced a TCAS 'climb' RA; with which we complied. We announced 'TCAS climb;' and reached a maximum altitude of 2400 feet. After watching the traffic cross below us; TCAS issued a 'clear of conflict;' and we returned to our assigned altitude of 2000.' the controller asked us if we had teterboro in sight; which we did; and he cleared us for a visual approach to 19. We landed uneventfully. After landing; I contacted ny TRACON in an effort to learn about the traffic and how we were able to pass within such close proximity. The supervisor informed me that this was a known issue; as the floor of the class B airspace from just south of tuggz to north of unvil and extending well west of cdw is 3000 feet. The floor of the class B airspace does not drop to 1800 feet until south of tuggz; and the northern boundary of teb's class D airspace is also just south of tuggz. As a result; traffic departing mmu or cdw can legally fly VFR at 2000 feet between unvil and tuggz; crossing the teb ILS 19 final approach course; without any requirement to contact ny TRACON. This can and does lead to TCAS RA's. Pilots will want to be aware of this geometry and remain vigilant when landing south in teterboro.
Original NASA ASRS Text
Title: Falcon 2000 Captain experiences a TCAS RA at 2;000 feet during vectors to the ILS 19 at TEB. The RA is complied with and the intruder passes below at 1;900 feet. N90 had issued a turn to intercept the ILS; which was also a turn into the traffic and was pointed out. Class B airspace above compresses VFR traffic into the approach path for TEB.
Narrative: While being vectored to the ILS 19 final approach course in VMC at an assigned altitude of 2000 feet; NY TRACON issued the following clearance: 'Turn right heading 165; Maintain 2000 feet until established; cleared ILS 19.' We acknowledged the clearance; when ATC called out traffic at 2 o'clock; 2 miles; altitude indicates 1900 feet. We then experienced a TCAS Traffic Alert. As we were in the right turn; I asked the controller if he still wished us to turn to heading 165. He instructed us to maintain present heading; and then paused as if uncertain as to what instruction to issue. We experienced a TCAS 'CLIMB' RA; with which we complied. We announced 'TCAS Climb;' and reached a maximum altitude of 2400 feet. After watching the traffic cross below us; TCAS issued a 'Clear of Conflict;' and we returned to our assigned altitude of 2000.' The controller asked us if we had Teterboro in sight; which we did; and he cleared us for a Visual Approach to 19. We landed uneventfully. After landing; I contacted NY TRACON in an effort to learn about the traffic and how we were able to pass within such close proximity. The supervisor informed me that this was a known issue; as the floor of the Class B Airspace from just south of TUGGZ to north of UNVIL and extending well west of CDW is 3000 feet. The floor of the Class B Airspace does not drop to 1800 feet until south of TUGGZ; and the northern boundary of TEB's Class D Airspace is also just south of TUGGZ. As a result; traffic departing MMU or CDW can legally fly VFR at 2000 feet between UNVIL and TUGGZ; crossing the TEB ILS 19 final approach course; without any requirement to contact NY TRACON. This can and does lead to TCAS RA's. Pilots will want to be aware of this geometry and remain vigilant when landing south in 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.