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An air carrier large transport climbed in response to a TCASII command. It was in the traffic pattern, about to land in IMC.
| Attributes | |
| ACN | 253052 |
| Time | |
| Date | 199309 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dca |
| State Reference | DC |
| Altitude | agl bound lower : 1000 agl bound upper : 1000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Helicopter |
| Flight Phase | cruise other descent : approach |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time total : 14000 |
| ASRS Report | 253032 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
During ILS approach, sbound, helicopter coming down potomac river about 500 ft MSL, traffic called by tower, we didn't see it. We got an RA on TCASII -- had to follow RA instructions. Then we were high above GS, had to descend more rapidly than we wanted to in order to land. This helicopter conflict around dca is a daily problem! Going to TA only on TCASII would defeat purpose of TCASII. Landing aircraft should not have to accommodate helicopter's. This is an accident waiting to happen.
Original NASA ASRS Text
Title: AN ACR LGT CLBED IN RESPONSE TO A TCASII COMMAND. IT WAS IN THE TFC PATTERN, ABOUT TO LAND IN IMC.
Narrative: DURING ILS APCH, SBOUND, HELI COMING DOWN POTOMAC RIVER ABOUT 500 FT MSL, TFC CALLED BY TWR, WE DIDN'T SEE IT. WE GOT AN RA ON TCASII -- HAD TO FOLLOW RA INSTRUCTIONS. THEN WE WERE HIGH ABOVE GS, HAD TO DSND MORE RAPIDLY THAN WE WANTED TO IN ORDER TO LAND. THIS HELI CONFLICT AROUND DCA IS A DAILY PROB! GOING TO TA ONLY ON TCASII WOULD DEFEAT PURPOSE OF TCASII. LNDG ACFT SHOULD NOT HAVE TO ACCOMMODATE HELI'S. THIS IS AN ACCIDENT WAITING TO HAPPEN.
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.