 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Near midair collision and less than standard separation between air carrier and small aircraft in traffic pattern. Operational error and or pilot deviation.
| Attributes | |
| ACN | 96192 |
| Time | |
| Date | 198810 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dal |
| State Reference | TX |
| Altitude | agl bound lower : 600 agl bound upper : 700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw tower : dal |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | landing other other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | landing other 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 : 14000 flight time type : 8000 |
| ASRS Report | 96192 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : nmac non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Operational Error Pilot Deviation |
Narrative:
Descending through 700' AGL on visual/ILS runway 31L love field saw blue/white small aircraft Y go under left side of aircraft. I immediately added power to level off until I saw small aircraft Y on right side of aircraft, then continued descent to landing. Tower was using 2 frequencys at the time. He was on the other frequency. Apparently had been told to go above and behind us. Maybe he didn't see us. I estimated him to be 50-100' below us. We were descending at 700 FPM. I leveled off as he appeared to be level. I saw him approximately 2 seconds before I took action. I think the tower got confused on approach due to unusual 2 frequency operation, everyone thinking somebody else was in control. I landed on runway 31L, he on 31R, although he approached from west side through runway 31L localizer.
Original NASA ASRS Text
Title: NMAC AND LESS THAN STANDARD SEPARATION BETWEEN ACR AND SMA IN TRAFFIC PATTERN. OPERATIONAL ERROR AND OR PLT DEVIATION.
Narrative: DSNDING THROUGH 700' AGL ON VISUAL/ILS RWY 31L LOVE FIELD SAW BLUE/WHITE SMA Y GO UNDER LEFT SIDE OF ACFT. I IMMEDIATELY ADDED PWR TO LEVEL OFF UNTIL I SAW SMA Y ON RIGHT SIDE OF ACFT, THEN CONTINUED DSCNT TO LNDG. TWR WAS USING 2 FREQS AT THE TIME. HE WAS ON THE OTHER FREQ. APPARENTLY HAD BEEN TOLD TO GO ABOVE AND BEHIND US. MAYBE HE DIDN'T SEE US. I ESTIMATED HIM TO BE 50-100' BELOW US. WE WERE DSNDING AT 700 FPM. I LEVELED OFF AS HE APPEARED TO BE LEVEL. I SAW HIM APPROX 2 SECS BEFORE I TOOK ACTION. I THINK THE TWR GOT CONFUSED ON APCH DUE TO UNUSUAL 2 FREQ OPERATION, EVERYONE THINKING SOMEBODY ELSE WAS IN CTL. I LANDED ON RWY 31L, HE ON 31R, ALTHOUGH HE APCHED FROM W SIDE THROUGH RWY 31L LOC.
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.