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Air carrier X TCASII RA from aircraft in VFR traffic pattern at adjacent airport executed a missed approach. Evasive action taken.
| Attributes | |
| ACN | 241531 |
| Time | |
| Date | 199305 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bfi |
| State Reference | WA |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sea |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 3 controller non radar : 1 controller radar : 11 |
| ASRS Report | 241531 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 600 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Air carrier X on final approach to runway 16R. At the OM, (the north end of boeing field), air carrier X indicated that he was climbing. The aircraft requested a 360 degrees to get down and land, but due to noise restrictions, was issued alternate missed approach and went around. There were 4 aircraft in the VFR traffic pattern at boeing, none above 1400 ft. Contacted later, the pilot indicated that he had received an RA on an unidented aircraft and followed it. This situation is a daily occurrence (sea landing traffic over aircraft in the boeing traffic pattern). TCASII is a hindrance in the traffic pattern. TCASII should be in traffic mode only. There was no indication on the flight strip that the aircraft was TCASII equipped.
Original NASA ASRS Text
Title: ACR X TCASII RA FROM ACFT IN VFR TFC PATTERN AT ADJACENT ARPT EXECUTED A MISSED APCH. EVASIVE ACTION TAKEN.
Narrative: ACR X ON FINAL APCH TO RWY 16R. AT THE OM, (THE N END OF BOEING FIELD), ACR X INDICATED THAT HE WAS CLBING. THE ACFT REQUESTED A 360 DEGS TO GET DOWN AND LAND, BUT DUE TO NOISE RESTRICTIONS, WAS ISSUED ALTERNATE MISSED APCH AND WENT AROUND. THERE WERE 4 ACFT IN THE VFR TFC PATTERN AT BOEING, NONE ABOVE 1400 FT. CONTACTED LATER, THE PLT INDICATED THAT HE HAD RECEIVED AN RA ON AN UNIDENTED ACFT AND FOLLOWED IT. THIS SIT IS A DAILY OCCURRENCE (SEA LNDG TFC OVER ACFT IN THE BOEING TFC PATTERN). TCASII IS A HINDRANCE IN THE TFC PATTERN. TCASII SHOULD BE IN TFC MODE ONLY. THERE WAS NO INDICATION ON THE FLT STRIP THAT THE ACFT WAS TCASII EQUIPPED.
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.