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Controller gives air carrier handoff frequency but before changeover air carrier comes back on frequency to say he had TCASII alert. Controller attempts TA but unreadable.
| Attributes | |
| ACN | 200010 |
| Time | |
| Date | 199201 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : psp |
| State Reference | CA |
| Altitude | msl bound lower : 14000 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 23 |
| ASRS Report | 200010 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
There was no real problem with the aircraft's maneuver this time. My biggest concern comes from the fact he had to take TCASII evasive action because he couldn't hear my radio transmission clearly to know the traffic was not a factor for him. Air carrier was given cross bands at 140, handed off to hemet sector and given frequency change. A min or so later air carrier advised on my frequency he was receiving a TCASII alert on traffic. I issued the traffic but air carrier said I was unreadable and he was taking TCASII evasive action and climbing. He was at 14200 and climbed to 15000. Fortunately I had traffic near him. This put air carrier over bands at 15000 versus 14000. I again gave air carrier ont approach frequency and he went over to them descending back to 140. All this caused no problem for ZLA.
Original NASA ASRS Text
Title: CTLR GIVES ACR HDOF FREQ BUT BEFORE CHANGEOVER ACR COMES BACK ON FREQ TO SAY HE HAD TCASII ALERT. CTLR ATTEMPTS TA BUT UNREADABLE.
Narrative: THERE WAS NO REAL PROBLEM WITH THE ACFT'S MANEUVER THIS TIME. MY BIGGEST CONCERN COMES FROM THE FACT HE HAD TO TAKE TCASII EVASIVE ACTION BECAUSE HE COULDN'T HEAR MY RADIO XMISSION CLRLY TO KNOW THE TFC WAS NOT A FACTOR FOR HIM. ACR WAS GIVEN CROSS BANDS AT 140, HANDED OFF TO HEMET SECTOR AND GIVEN FREQ CHANGE. A MIN OR SO LATER ACR ADVISED ON MY FREQ HE WAS RECEIVING A TCASII ALERT ON TFC. I ISSUED THE TFC BUT ACR SAID I WAS UNREADABLE AND HE WAS TAKING TCASII EVASIVE ACTION AND CLBING. HE WAS AT 14200 AND CLBED TO 15000. FORTUNATELY I HAD TFC NEAR HIM. THIS PUT ACR OVER BANDS AT 15000 VERSUS 14000. I AGAIN GAVE ACR ONT APCH FREQ AND HE WENT OVER TO THEM DSNDING BACK TO 140. ALL THIS CAUSED NO PROBLEM FOR ZLA.
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.