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A C150 on initial climb from runway 19L at sna drifts into the initial climb path of a B737-400 departing runway 19R.
| Attributes | |
| ACN | 440974 |
| Time | |
| Date | 199906 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sna.airport |
| State Reference | CA |
| Altitude | agl bound lower : 0 agl bound upper : 100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sna.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : initial climbout : takeoff ground : takeoff roll |
| Route In Use | departure sid : ns |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : sna.tower |
| Operator | general aviation : personal |
| Make Model Name | Cessna 150 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | climbout : takeoff climbout : initial |
| Route In Use | departure : vfr |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 10000 flight time type : 3000 |
| ASRS Report | 440974 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 6500 flight time type : 1000 |
| ASRS Report | 441076 |
| Events | |
| Anomaly | conflict : nmac non adherence : required legal separation non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | horizontal : 50 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airport ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
A C150 was cleared for takeoff on runway 19L at sna. We were cleared for takeoff on runway 19R immediately afterwards. During our takeoff roll, the now airborne cessna began to drift right, towards over runway. As we rotated, the cessna's drift rate appeared to increase. We climbed past him correcting to the right for avoidance. Horizontal separation was gauged to be about 50 ft wingtip-to-wingtip. Supplemental information from acn 441076: the cessna, which took off before us, was flying on runway heading and drifted very close to our flight path. The surface winds on ATIS were 210 degrees at 9 KTS. I strongly believe that with large aircraft taking off or landing on such close/parallel runways that GA or other aircraft should not take off or land at such close intervals.
Original NASA ASRS Text
Title: A C150 ON INITIAL CLB FROM RWY 19L AT SNA DRIFTS INTO THE INITIAL CLB PATH OF A B737-400 DEPARTING RWY 19R.
Narrative: A C150 WAS CLRED FOR TKOF ON RWY 19L AT SNA. WE WERE CLRED FOR TKOF ON RWY 19R IMMEDIATELY AFTERWARDS. DURING OUR TKOF ROLL, THE NOW AIRBORNE CESSNA BEGAN TO DRIFT R, TOWARDS OVER RWY. AS WE ROTATED, THE CESSNA'S DRIFT RATE APPEARED TO INCREASE. WE CLBED PAST HIM CORRECTING TO THE R FOR AVOIDANCE. HORIZ SEPARATION WAS GAUGED TO BE ABOUT 50 FT WINGTIP-TO-WINGTIP. SUPPLEMENTAL INFO FROM ACN 441076: THE CESSNA, WHICH TOOK OFF BEFORE US, WAS FLYING ON RWY HDG AND DRIFTED VERY CLOSE TO OUR FLT PATH. THE SURFACE WINDS ON ATIS WERE 210 DEGS AT 9 KTS. I STRONGLY BELIEVE THAT WITH LARGE ACFT TAKING OFF OR LNDG ON SUCH CLOSE/PARALLEL RWYS THAT GA OR OTHER ACFT SHOULD NOT TAKE OFF OR LAND AT SUCH CLOSE INTERVALS.
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.