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Air carrier medium large transport delays resuming climb in response to TCASII RA.
| Attributes | |
| ACN | 175454 |
| Time | |
| Date | 199104 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sna |
| State Reference | CA |
| Altitude | msl bound lower : 6000 msl bound upper : 6500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sna |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 6300 |
| ASRS Report | 175454 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
We departed runway 19R and just went to departure control. We were flying 175 degree heading climbing to 3000'. The controller issued climb to 6000', turn left to 125 degrees. We had just leveled off when the TCASII issued a traffic advisory. The captain was flying. We both looked down at the TCAS and saw an aircraft converging at 12:30 and 5 mi. The TCAS indicated the aircraft was 6500'. The controller had issued this traffic earlier. The controller then issued a clearance turn right to 145 degrees and climb to 10000'. Immediately after the clearance the TCAS unit issued a RA, 'descend, descend.' the target on the TCAS went from white to yellow to red. The aircraft was approaching our aircraft. His position was at 1:30-2 O'clock, 2 mi. The captain maintained 6000' and within 2 seconds he called traffic in sight. Shortly after the conflict was over. I had delayed my clearance readback to the controller. He once again reissued the clearance. I then told the controller we had received a TCAS alert. His statement was, 'I issued that traffic and the aircraft wasn't even close.' my opinion is the traffic did have the legal 500' sep, but the controller definitely issued the clearance too soon. I am glad we had TCAS on board that day, and I think TCAS should be mandatory for all airlines flying in sna.
Original NASA ASRS Text
Title: ACR MLG DELAYS RESUMING CLIMB IN RESPONSE TO TCASII RA.
Narrative: WE DEPARTED RWY 19R AND JUST WENT TO DEP CTL. WE WERE FLYING 175 DEG HDG CLBING TO 3000'. THE CTLR ISSUED CLB TO 6000', TURN LEFT TO 125 DEGS. WE HAD JUST LEVELED OFF WHEN THE TCASII ISSUED A TFC ADVISORY. THE CAPT WAS FLYING. WE BOTH LOOKED DOWN AT THE TCAS AND SAW AN ACFT CONVERGING AT 12:30 AND 5 MI. THE TCAS INDICATED THE ACFT WAS 6500'. THE CTLR HAD ISSUED THIS TFC EARLIER. THE CTLR THEN ISSUED A CLRNC TURN RIGHT TO 145 DEGS AND CLB TO 10000'. IMMEDIATELY AFTER THE CLRNC THE TCAS UNIT ISSUED A RA, 'DSND, DSND.' THE TARGET ON THE TCAS WENT FROM WHITE TO YELLOW TO RED. THE ACFT WAS APCHING OUR ACFT. HIS POS WAS AT 1:30-2 O'CLOCK, 2 MI. THE CAPT MAINTAINED 6000' AND WITHIN 2 SECS HE CALLED TFC IN SIGHT. SHORTLY AFTER THE CONFLICT WAS OVER. I HAD DELAYED MY CLRNC READBACK TO THE CTLR. HE ONCE AGAIN REISSUED THE CLRNC. I THEN TOLD THE CTLR WE HAD RECEIVED A TCAS ALERT. HIS STATEMENT WAS, 'I ISSUED THAT TFC AND THE ACFT WASN'T EVEN CLOSE.' MY OPINION IS THE TFC DID HAVE THE LEGAL 500' SEP, BUT THE CTLR DEFINITELY ISSUED THE CLRNC TOO SOON. I AM GLAD WE HAD TCAS ON BOARD THAT DAY, AND I THINK TCAS SHOULD BE MANDATORY FOR ALL AIRLINES FLYING IN SNA.
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.