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Near midair collision between large transport-air carrier and GA-twin. See and avoid situation, but with ATC involvement.
| Attributes | |
| ACN | 101123 |
| Time | |
| Date | 198812 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : gvo |
| State Reference | CA |
| Altitude | msl bound lower : 12500 msl bound upper : 12500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute airway : v27 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 2200 |
| ASRS Report | 101123 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac non adherence : far other anomaly other |
| Independent Detector | other flight crewa other other : unspecified atc |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 100 vertical : 150 |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
Our flight was cleared from FL240 to 9000' by ZLA. Passing 12800' we saw a white and black light twin at 11:30 position and approximately less than 1 NM. We immediately took evasive action by stopping the descent and turning away (to the right) from the traffic. I called center and reported the near miss and determined the aircraft was small transport Y squawking 7221, also talking to the center (frequency 119.05). The controller said something like, 'sorry I didn't call him sooner.' contributing factors: 1) no traffic call from ATC. 2) other aircraft blended into background of low scattered clouds, lightly snow covered ridge tops and brown hillsides. 3) low visibility profile of almost head on traffic. White paint with black trim hard to pick out. Both aircraft saw and were able to avoid collision by turning away from each other with correct direction of turn by both.
Original NASA ASRS Text
Title: NMAC BETWEEN LGT-ACR AND GA-TWIN. SEE AND AVOID SITUATION, BUT WITH ATC INVOLVEMENT.
Narrative: OUR FLT WAS CLRED FROM FL240 TO 9000' BY ZLA. PASSING 12800' WE SAW A WHITE AND BLACK LIGHT TWIN AT 11:30 POS AND APPROX LESS THAN 1 NM. WE IMMEDIATELY TOOK EVASIVE ACTION BY STOPPING THE DSCNT AND TURNING AWAY (TO THE RIGHT) FROM THE TFC. I CALLED CENTER AND RPTED THE NEAR MISS AND DETERMINED THE ACFT WAS SMT Y SQUAWKING 7221, ALSO TALKING TO THE CENTER (FREQ 119.05). THE CTLR SAID SOMETHING LIKE, 'SORRY I DIDN'T CALL HIM SOONER.' CONTRIBUTING FACTORS: 1) NO TFC CALL FROM ATC. 2) OTHER ACFT BLENDED INTO BACKGROUND OF LOW SCATTERED CLOUDS, LIGHTLY SNOW COVERED RIDGE TOPS AND BROWN HILLSIDES. 3) LOW VIS PROFILE OF ALMOST HEAD ON TFC. WHITE PAINT WITH BLACK TRIM HARD TO PICK OUT. BOTH ACFT SAW AND WERE ABLE TO AVOID COLLISION BY TURNING AWAY FROM EACH OTHER WITH CORRECT DIRECTION OF TURN BY BOTH.
Data retrieved from NASA's ASRS site as of August 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.