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TCASII RA instigates evasive action climb in flight crew response to proximity of rotary winged traffic on IAP ILS approach.
| Attributes | |
| ACN | 252362 |
| Time | |
| Date | 199309 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lga |
| State Reference | NY |
| Altitude | msl bound lower : 1900 msl bound upper : 2200 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : lga |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air taxi |
| Make Model Name | Helicopter |
| Flight Phase | cruise other cruise other |
| Route In Use | approach : visual enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 260 flight time total : 11500 flight time type : 450 |
| ASRS Report | 252362 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 240 flight time total : 3500 flight time type : 1000 |
| ASRS Report | 252808 |
| Events | |
| Anomaly | altitude deviation : undershoot non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 600 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While on the ILS-4 approach to lga, we received a TCASII TA at 6 mi out. Following the RA instructions resulted in us being slightly above the GS for several seconds. After the 'clear of conflict' message was received, the GS was recaptured and the approach resumed. RA came from a VFR helicopter down low below the overcast operating through the approach course. Supplemental information from acn 252808: ATC should not clear aircraft to fly beneath approach course when ILS in use.
Original NASA ASRS Text
Title: TCASII RA INSTIGATES EVASIVE ACTION CLB IN FLC RESPONSE TO PROX OF ROTARY WINGED TFC ON IAP ILS APCH.
Narrative: WHILE ON THE ILS-4 APCH TO LGA, WE RECEIVED A TCASII TA AT 6 MI OUT. FOLLOWING THE RA INSTRUCTIONS RESULTED IN US BEING SLIGHTLY ABOVE THE GS FOR SEVERAL SECONDS. AFTER THE 'CLR OF CONFLICT' MESSAGE WAS RECEIVED, THE GS WAS RECAPTURED AND THE APCH RESUMED. RA CAME FROM A VFR HELI DOWN LOW BELOW THE OVCST OPERATING THROUGH THE APCH COURSE. SUPPLEMENTAL INFORMATION FROM ACN 252808: ATC SHOULD NOT CLR ACFT TO FLY BENEATH APCH COURSE WHEN ILS IN USE.
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.