<< >> NASA ASRS Report 539676, March 2002

Light transport business jet flight crew climbed in response to a TCASII RA during final on an ILS approach. Tower frequency, both local and ground, were congested preventing crew to notify them of their altitude excursion.

Attributes
ACN	539676
Time
Date	200203
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : teb.airport
State Reference	NJ
Altitude	msl single value : 1000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : teb.tower tracon : zzz.tracon
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 6
Flight Phase	descent : approach
Route In Use	approach : circling
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : teb.tower
Make Model Name	Helicopter
Flight Phase	descent : approach
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 5600 flight time type : 2400
ASRS Report	539676
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	horizontal : 1000 vertical : 300
Supplementary
Problem Areas	ATC Human Performance Environmental Factor Airspace Structure Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Landing at teb. Flew ILS to runway 6, circle to runway 1. On left base to final turn at approximately 1000 ft MSL, a target appeared on TCASII less than 1 NM at 700 ft followed immediately by an RA 'climb!' we responded to the RA as we did not see the target. This resulted in a steeper than normal, though still safe approach. Congestion on tower frequency prevented us from notifying tower. After clearing the runway taxiing south on the parallel we noted several helicopter's in the area, one appeared to be hovering on the final approach course to runway 1. Congestion on ground control frequency prevented us from telling the ground controller of the incident. Attempted to reach tower by phone, left message, awaiting return call.

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Original NASA ASRS Text

Title: LTT BUSINESS JET FLC CLBED IN RESPONSE TO A TCASII RA DURING FINAL ON AN ILS APCH. TWR FREQ, BOTH LCL AND GND, WERE CONGESTED PREVENTING CREW TO NOTIFY THEM OF THEIR ALT EXCURSION.

Narrative: LNDG AT TEB. FLEW ILS TO RWY 6, CIRCLE TO RWY 1. ON L BASE TO FINAL TURN AT APPROX 1000 FT MSL, A TARGET APPEARED ON TCASII LESS THAN 1 NM AT 700 FT FOLLOWED IMMEDIATELY BY AN RA 'CLB!' WE RESPONDED TO THE RA AS WE DID NOT SEE THE TARGET. THIS RESULTED IN A STEEPER THAN NORMAL, THOUGH STILL SAFE APCH. CONGESTION ON TWR FREQ PREVENTED US FROM NOTIFYING TWR. AFTER CLRING THE RWY TAXIING S ON THE PARALLEL WE NOTED SEVERAL HELI'S IN THE AREA, ONE APPEARED TO BE HOVERING ON THE FINAL APCH COURSE TO RWY 1. CONGESTION ON GND CTL FREQ PREVENTED US FROM TELLING THE GND CTLR OF THE INCIDENT. ATTEMPTED TO REACH TWR BY PHONE, LEFT MESSAGE, AWAITING RETURN CALL.

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.