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A lancair 4 pilot at 6500 ft reports an near midair collision with a B737 after the air carrier aircraft departed sna and did not level at its assigned 5000 ft.
| Attributes | |
| ACN | 708900 |
| Time | |
| Date | 200608 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sct.tracon |
| State Reference | CA |
| Altitude | msl single value : 6500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : personal |
| Make Model Name | LA-4 A/B Buccaneer |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | None |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 6500 flight time type : 250 |
| ASRS Report | 708900 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 500 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
VFR transituationion through lax class B airspace; south to north; VFR; according to approach control clearance. Cruise climbing through approximately 6500 ft; 8500 ft assigned. B737 departed orange county to the west and began left climbing turn. The B737 was approximately 1 mi ahead and below (more than 1 mi down) and off our l-hand side. The boeing was kept in sight and observed 100% of the time; no clouds. The boeing continued its climb and continued its left turn. Once a nose on aspect was realized; with a relatively high rate of closure; I began a nose down pitch as an avoidance maneuver; copilot and I commented to each other throughout the evolution. Boeing rolled wings level about 1000 ft out and passed to our rear at approximately 500 ft/same altitude. Approach controller then queried the boeing as to what altitude it was at. The boeing replied 6500 ft (or thereabout). Approach control stated that the assigned altitude was 5000 ft. Boeing replied something like; 'well; I guess so....' approach controller then queried me as to what altitude I was at. I replied 6.5 and climbing. Approach controller then asserted that I was breaking up and unreadable. All clear a couple of xmissions later (same radio). Boeing crew asked controller for a time hack after the event. Continued transituationion uneventfully.
Original NASA ASRS Text
Title: A LANCAIR 4 PLT AT 6500 FT RPTS AN NMAC WITH A B737 AFTER THE ACR ACFT DEPARTED SNA AND DID NOT LEVEL AT ITS ASSIGNED 5000 FT.
Narrative: VFR TRANSITUATIONION THROUGH LAX CLASS B AIRSPACE; S TO N; VFR; ACCORDING TO APCH CTL CLRNC. CRUISE CLBING THROUGH APPROX 6500 FT; 8500 FT ASSIGNED. B737 DEPARTED ORANGE COUNTY TO THE W AND BEGAN L CLBING TURN. THE B737 WAS APPROX 1 MI AHEAD AND BELOW (MORE THAN 1 MI DOWN) AND OFF OUR L-HAND SIDE. THE BOEING WAS KEPT IN SIGHT AND OBSERVED 100% OF THE TIME; NO CLOUDS. THE BOEING CONTINUED ITS CLB AND CONTINUED ITS L TURN. ONCE A NOSE ON ASPECT WAS REALIZED; WITH A RELATIVELY HIGH RATE OF CLOSURE; I BEGAN A NOSE DOWN PITCH AS AN AVOIDANCE MANEUVER; COPLT AND I COMMENTED TO EACH OTHER THROUGHOUT THE EVOLUTION. BOEING ROLLED WINGS LEVEL ABOUT 1000 FT OUT AND PASSED TO OUR REAR AT APPROX 500 FT/SAME ALT. APCH CTLR THEN QUERIED THE BOEING AS TO WHAT ALT IT WAS AT. THE BOEING REPLIED 6500 FT (OR THEREABOUT). APCH CTL STATED THAT THE ASSIGNED ALT WAS 5000 FT. BOEING REPLIED SOMETHING LIKE; 'WELL; I GUESS SO....' APCH CTLR THEN QUERIED ME AS TO WHAT ALT I WAS AT. I REPLIED 6.5 AND CLBING. APCH CTLR THEN ASSERTED THAT I WAS BREAKING UP AND UNREADABLE. ALL CLR A COUPLE OF XMISSIONS LATER (SAME RADIO). BOEING CREW ASKED CTLR FOR A TIME HACK AFTER THE EVENT. CONTINUED TRANSITUATIONION UNEVENTFULLY.
Data retrieved from NASA's ASRS site as of January 2009 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.