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GA pilot reported a near midair collision on climbout from stl class B while not communicating with ATC. He did not reset the transponder code to 1200 from a previous flight.
| Attributes | |
| ACN | 1475124 |
| Time | |
| Date | 201708 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | STL.Airport |
| State Reference | MO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Aircraft |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Climb |
| Route In Use | Direct |
| Flight Plan | None |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Climb |
| Component | |
| Aircraft Component | Transponder |
| Person 1 | |
| Function | Single Pilot |
| Qualification | Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 30 Flight Crew Total 2200 Flight Crew Type 170 |
| Events | |
| Anomaly | Conflict NMAC Deviation - Procedural Published Material / Policy |
| Miss Distance | Horizontal 2000 Vertical 100 |
Narrative:
Forgot to reset transponder after an IFR flight while flying home VFR. Flew out from under stl class B with incorrect code. Was not on a flight plan or talking to ATC. Noticed on ads-B that I was either ghosting or getting very close to an airplane indicating a climb and heading the same direction and within 100 feet. I was climbing. Decided to descend and see if the image changed. It did. Never saw the airplane; but evidently came very close to it. I slightly changed course; as did the other plane; which appeared to stop climbing at 7;000 feet. I continued my climb to 11;500 without further incident. Unfortunately still squawking the code given earlier in the day; eventually changing code to 1200 about 3/4 the way home.
Original NASA ASRS Text
Title: GA pilot reported a NMAC on climbout from STL class B while not communicating with ATC. He did not reset the transponder code to 1200 from a previous flight.
Narrative: Forgot to reset transponder after an IFR flight while flying home VFR. Flew out from under STL Class B with incorrect code. Was not on a flight plan or talking to ATC. Noticed on ADS-B that I was either ghosting or getting very close to an airplane indicating a climb and heading the same direction and within 100 feet. I was climbing. Decided to descend and see if the image changed. It did. Never saw the airplane; but evidently came very close to it. I slightly changed course; as did the other plane; which appeared to stop climbing at 7;000 feet. I continued my climb to 11;500 without further incident. Unfortunately still squawking the code given earlier in the day; eventually changing code to 1200 about 3/4 the way home.
Data retrieved from NASA's ASRS site 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.