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Flight crew of a B737 on departure climb from lgb stops climb and descended in response to a TCASII RA and departure controller instructions due to potential conflict with an observed low wing small aircraft.
| Attributes | |
| ACN | 477970 |
| Time | |
| Date | 200007 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : sli.vortac |
| State Reference | CA |
| Altitude | msl bound lower : 2200 msl bound upper : 2800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure : other published ifr departure departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : personal |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 12000 flight time type : 8000 |
| ASRS Report | 477970 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | conflict : airborne critical |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued advisory controller : separated traffic flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 2000 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We departed lgb on the afternoon of jul/xa/00. There were numerous small aircraft in the area. Our TCASII was full of targets before we even took off. Our departure calls for us to make a right left turn out of 1500 ft MSL. We were handed off to departure control (socal) in the turn. Socal issued a traffic alert and suggested we stop our climb (the airspace is under lax class B, so there were numerous aircraft to whom he was not talking). We stopped our climb at 2200 ft for about 30 seconds and were then issued a climb to 4000 ft. Through 2800 ft, ATC and TCASII issued a 'descend' command. We complied. The aircraft that triggered the alert was 200 ft above us and passed directly over us, after we descended. We stopped the descent at 2200 ft. ATC told us we were clear of the conflict and could resume our climb. The rest of the flight was uneventful. My own conclusion is that flying in VFR conditions, under a TCASII (class B) is a dangerous thing to do.
Original NASA ASRS Text
Title: FLC OF A B737 ON DEP CLB FROM LGB STOPS CLB AND DSNDED IN RESPONSE TO A TCASII RA AND DEP CTLR INSTRUCTIONS DUE TO POTENTIAL CONFLICT WITH AN OBSERVED LOW WING SMA.
Narrative: WE DEPARTED LGB ON THE AFTERNOON OF JUL/XA/00. THERE WERE NUMEROUS SMALL ACFT IN THE AREA. OUR TCASII WAS FULL OF TARGETS BEFORE WE EVEN TOOK OFF. OUR DEP CALLS FOR US TO MAKE A RIGHT L TURN OUT OF 1500 FT MSL. WE WERE HANDED OFF TO DEP CTL (SOCAL) IN THE TURN. SOCAL ISSUED A TFC ALERT AND SUGGESTED WE STOP OUR CLB (THE AIRSPACE IS UNDER LAX CLASS B, SO THERE WERE NUMEROUS ACFT TO WHOM HE WAS NOT TALKING). WE STOPPED OUR CLB AT 2200 FT FOR ABOUT 30 SECONDS AND WERE THEN ISSUED A CLB TO 4000 FT. THROUGH 2800 FT, ATC AND TCASII ISSUED A 'DSND' COMMAND. WE COMPLIED. THE ACFT THAT TRIGGERED THE ALERT WAS 200 FT ABOVE US AND PASSED DIRECTLY OVER US, AFTER WE DSNDED. WE STOPPED THE DSCNT AT 2200 FT. ATC TOLD US WE WERE CLR OF THE CONFLICT AND COULD RESUME OUR CLB. THE REST OF THE FLT WAS UNEVENTFUL. MY OWN CONCLUSION IS THAT FLYING IN VFR CONDITIONS, UNDER A TCASII (CLASS B) IS A DANGEROUS THING TO DO.
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.