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SA319 adjusts departure climb rate from sna to avoid previous departing B733 when sct controller crisscrosses both aircraft departure rtes.
| Attributes | |
| ACN | 498900 |
| Time | |
| Date | 200101 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sna.airport |
| State Reference | CA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : initial climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 150 flight time total : 25000 flight time type : 120 |
| ASRS Report | 498900 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 18000 vertical : 1000 |
| Supplementary | |
| Problem Areas | ATC Human Performance Airspace Structure |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure |
Narrative:
Took off from sna behind B737-300 (aircraft Y) with instructions to maintain visual separation with B737 at our 11 O'clock position. They were given a left turn across out path. Safety was not in doubt, but TCASII did activate and we did reduce our climb rate momentarily. Had departure issued our turn to the left prior to the B757's turn to the right, the distance between aircraft would never have decreased. Callback conversation with reporter revealed the following information: reporter advised this was a 'one time only' type operation that he has encountered. The reporter advised that the departure controller sounded as if the 2 aircraft were not in the place as he expected them to be.
Original NASA ASRS Text
Title: SA319 ADJUSTS DEP CLB RATE FROM SNA TO AVOID PREVIOUS DEPARTING B733 WHEN SCT CTLR CRISSCROSSES BOTH ACFT DEP RTES.
Narrative: TOOK OFF FROM SNA BEHIND B737-300 (ACFT Y) WITH INSTRUCTIONS TO MAINTAIN VISUAL SEPARATION WITH B737 AT OUR 11 O'CLOCK POS. THEY WERE GIVEN A L TURN ACROSS OUT PATH. SAFETY WAS NOT IN DOUBT, BUT TCASII DID ACTIVATE AND WE DID REDUCE OUR CLB RATE MOMENTARILY. HAD DEP ISSUED OUR TURN TO THE L PRIOR TO THE B757'S TURN TO THE R, THE DISTANCE BTWN ACFT WOULD NEVER HAVE DECREASED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR ADVISED THIS WAS A 'ONE TIME ONLY' TYPE OP THAT HE HAS ENCOUNTERED. THE RPTR ADVISED THAT THE DEP CTLR SOUNDED AS IF THE 2 ACFT WERE NOT IN THE PLACE AS HE EXPECTED THEM TO BE.
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.