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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Near midair collision between a B737 descending on arrival and a twin engine aircraft level at a VFR altitude. ARTCC radar controller issued a TA just prior to turning the B737 over to approach control and a required routing turn which caused a turn toward the other aircraft.
| Attributes | |
| ACN | 414176 |
| Time | |
| Date | 199809 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : fim airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 14000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zla |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| 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 : 250 flight time total : 20000 flight time type : 10000 |
| ASRS Report | 414176 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were issued VFR traffic at 14500 ft (or 16500 ft). We acknowledged traffic. We were then given a frequency change. During this time we made a turn on the arrival. It was hard - - I realized that we were on what appeared to be a collision course with the traffic. I was the PF and took evasive action. We missed the twin engine aircraft by just a few hundred ft it seemed. We were descending at the time.
Original NASA ASRS Text
Title: NMAC BTWN A B737 DSNDING ON ARR AND A TWIN ENG ACFT LEVEL AT A VFR ALT. ARTCC RADAR CTLR ISSUED A TA JUST PRIOR TO TURNING THE B737 OVER TO APCH CTL AND A REQUIRED ROUTING TURN WHICH CAUSED A TURN TOWARD THE OTHER ACFT.
Narrative: WE WERE ISSUED VFR TFC AT 14500 FT (OR 16500 FT). WE ACKNOWLEDGED TFC. WE WERE THEN GIVEN A FREQ CHANGE. DURING THIS TIME WE MADE A TURN ON THE ARR. IT WAS HARD - - I REALIZED THAT WE WERE ON WHAT APPEARED TO BE A COLLISION COURSE WITH THE TFC. I WAS THE PF AND TOOK EVASIVE ACTION. WE MISSED THE TWIN ENG ACFT BY JUST A FEW HUNDRED FT IT SEEMED. WE WERE DSNDING AT THE TIME.
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.