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Air carrier pilot hears only the last 2 digits of call sign from ATC with instruction to turn. Pilot does not turn and receives a TCASII RA.
| Attributes | |
| ACN | 229625 |
| Time | |
| Date | 199212 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ont |
| State Reference | CA |
| Altitude | msl bound lower : 6800 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ont tower : hou |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : initial |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| 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 : 7000 flight time type : 2000 |
| ASRS Report | 229625 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Departing ont on prado 2 departure approximately over pdz VOR passing 6000 ft for 7000 ft, we heard ont approach say 'yz, turn left to heading 100 degrees.' I heard this call 2 or 3 times in the space of 1 min or so and never figured out that the call was intended for my aircraft, air carrier xyz, until I received a TA then RA on TCASII to which I responded and descended from about 7000 ft to 6800 ft. We then turned left to 100 degrees and continued our climb. This is my second near miss in approximately 2 yrs in the same geographic area. This frequency, 135.0, is frequently overloaded causing the controllers to rush their xmissions and add to the confusion.
Original NASA ASRS Text
Title: ACR PLT HEARS ONLY THE LAST 2 DIGITS OF CALL SIGN FROM ATC WITH INSTRUCTION TO TURN. PLT DOES NOT TURN AND RECEIVES A TCASII RA.
Narrative: DEPARTING ONT ON PRADO 2 DEP APPROX OVER PDZ VOR PASSING 6000 FT FOR 7000 FT, WE HEARD ONT APCH SAY 'YZ, TURN L TO HDG 100 DEGS.' I HEARD THIS CALL 2 OR 3 TIMES IN THE SPACE OF 1 MIN OR SO AND NEVER FIGURED OUT THAT THE CALL WAS INTENDED FOR MY ACFT, ACR XYZ, UNTIL I RECEIVED A TA THEN RA ON TCASII TO WHICH I RESPONDED AND DSNDED FROM ABOUT 7000 FT TO 6800 FT. WE THEN TURNED L TO 100 DEGS AND CONTINUED OUR CLB. THIS IS MY SECOND NEAR MISS IN APPROX 2 YRS IN THE SAME GEOGRAPHIC AREA. THIS FREQ, 135.0, IS FREQUENTLY OVERLOADED CAUSING THE CTLRS TO RUSH THEIR XMISSIONS AND ADD TO THE CONFUSION.
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.