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An large transport air carrier had less than standard separation with another unspecified aircraft after takeoff navigating on a SID. Potential conflict.
| Attributes | |
| ACN | 223263 |
| Time | |
| Date | 199210 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sea |
| State Reference | WA |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| 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 | climbout : intermediate altitude cruise other |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 14000 flight time type : 210 |
| ASRS Report | 223263 |
| 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 |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were departing seattle for dulles on flight X. Discussion was held at the gate between me and the first officer on how best to program the departure in the CDU. We decided to program the latitude and longitude of the turn point for departures from runway 16 in the CDU and use LNAV after takeoff to direct us to the turning point and then heading select for the required turn to 070 degrees. Takeoff was uneventful from runway 16R and the first officer called for and I initiated LNAV and VNAV at the proper points. At the turn point, the first officer called for and was given heading select to a heading of 070 degrees. As we entered the turn, I observed an aircraft at 10 O'clock to our position and slightly below us also in a left turn. I pointed out the traffic to the first officer and he shallowed out his bank. I then called departure control and inquired about the other aircraft. Departure gave us a heading of 100 degrees and the departure was completed uneventfully. We were at all times above and outside the turn of the other aircraft. Possibly this departure could better be flown in the VOR mode, however the CDU and present position were checked per SOP prior to engine start and SOP was followed during the departure.
Original NASA ASRS Text
Title: AN LGT ACR HAD LTSS WITH ANOTHER UNSPECIFIED ACFT AFTER TKOF NAVING ON A SID. POTENTIAL CONFLICT.
Narrative: WE WERE DEPARTING SEATTLE FOR DULLES ON FLT X. DISCUSSION WAS HELD AT THE GATE BTWN ME AND THE FO ON HOW BEST TO PROGRAM THE DEP IN THE CDU. WE DECIDED TO PROGRAM THE LATITUDE AND LONGITUDE OF THE TURN POINT FOR DEPS FROM RWY 16 IN THE CDU AND USE LNAV AFTER TKOF TO DIRECT US TO THE TURNING POINT AND THEN HDG SELECT FOR THE REQUIRED TURN TO 070 DEGS. TKOF WAS UNEVENTFUL FROM RWY 16R AND THE FO CALLED FOR AND I INITIATED LNAV AND VNAV AT THE PROPER POINTS. AT THE TURN POINT, THE FO CALLED FOR AND WAS GIVEN HDG SELECT TO A HDG OF 070 DEGS. AS WE ENTERED THE TURN, I OBSERVED AN ACFT AT 10 O'CLOCK TO OUR POS AND SLIGHTLY BELOW US ALSO IN A L TURN. I POINTED OUT THE TFC TO THE FO AND HE SHALLOWED OUT HIS BANK. I THEN CALLED DEP CTL AND INQUIRED ABOUT THE OTHER ACFT. DEP GAVE US A HDG OF 100 DEGS AND THE DEP WAS COMPLETED UNEVENTFULLY. WE WERE AT ALL TIMES ABOVE AND OUTSIDE THE TURN OF THE OTHER ACFT. POSSIBLY THIS DEP COULD BETTER BE FLOWN IN THE VOR MODE, HOWEVER THE CDU AND PRESENT POS WERE CHKED PER SOP PRIOR TO ENG START AND SOP WAS FOLLOWED DURING THE DEP.
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.