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Air carrier Y TCASII RA with air carrier X caused less than standard separation with air carrier Z. Pilot deviation.
| Attributes | |
| ACN | 238265 |
| Time | |
| Date | 199304 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : sea |
| State Reference | WA |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sea |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 25 |
| ASRS Report | 238265 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X swbound level 9000 ft. Air carrier Y nebound leaving 10300 ft for 10000 ft. Air carrier Z nebound above air carrier Y 11500 ft for 11000 ft. Traffic issued to air carrier Y as '1 O'clock, 6 mi, level 9000 ft.' air carrier Y acknowledged traffic, leveled at 10000 ft. Air carrier Z leveled above and slightly behind air carrier Y at 11000 ft. Air carrier Y advised 'I have RA and climbing.' I instructed air carrier Y to 'stop climb, traffic overhead at 11000 ft!' I informed supervisor of loss of separation.
Original NASA ASRS Text
Title: ACR Y TCASII RA WITH ACR X CAUSED LTSS WITH ACR Z. PLTDEV.
Narrative: ACR X SWBOUND LEVEL 9000 FT. ACR Y NEBOUND LEAVING 10300 FT FOR 10000 FT. ACR Z NEBOUND ABOVE ACR Y 11500 FT FOR 11000 FT. TFC ISSUED TO ACR Y AS '1 O'CLOCK, 6 MI, LEVEL 9000 FT.' ACR Y ACKNOWLEDGED TFC, LEVELED AT 10000 FT. ACR Z LEVELED ABOVE AND SLIGHTLY BEHIND ACR Y AT 11000 FT. ACR Y ADVISED 'I HAVE RA AND CLBING.' I INSTRUCTED ACR Y TO 'STOP CLB, TFC OVERHEAD AT 11000 FT!' I INFORMED SUPVR OF LOSS OF SEPARATION.
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.