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Uncontrolled airport with heavy traffic in pattern. Near midair collision with aircraft on ILS straight in approach.
| Attributes | |
| ACN | 114066 |
| Time | |
| Date | 198906 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : cxy airport : gxy |
| State Reference | CO |
| Altitude | agl bound lower : 300 agl bound upper : 600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | descent : approach descent other |
| Flight Plan | None |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 170 flight time total : 850 flight time type : 75 |
| ASRS Report | 114066 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 50 |
| Supplementary | |
| Primary Problem | Airport |
| Situations | |
| Airport | other physical facility |
Narrative:
While in traffic pattern #3 on downwind aircraft #1 diverted to avoid aircraft on final starting ILS missed approach. #2 turned base in front of #2 on ILS causing that aircraft to slow. Observing and avoiding 2 aircraft deviating from the pattern, I did not see the 3RD on ILS short final. See drawing on back. Correction and prevention: this airport is by far too busy to remain uncontrolled. Callback conversation with reporter revealed the following: reporter states he did a go around and so did other pilot with whom he had near midair collision. Reporter stayed low over taxiway until determined what other aircraft was planning to do. Says field has about 4 FBO's on field, an ILS, VOR and NDB approach so many instructors use as a training area. Many instructors and students do not use CTAF because just too busy. He may contact FAA to see if traffic warrants a tower. Says they have more traffic than stapleton.
Original NASA ASRS Text
Title: UNCONTROLLED ARPT WITH HEAVY TRAFFIC IN PATTERN. NMAC WITH ACFT ON ILS STRAIGHT IN APCH.
Narrative: WHILE IN TFC PATTERN #3 ON DOWNWIND ACFT #1 DIVERTED TO AVOID ACFT ON FINAL STARTING ILS MISSED APCH. #2 TURNED BASE IN FRONT OF #2 ON ILS CAUSING THAT ACFT TO SLOW. OBSERVING AND AVOIDING 2 ACFT DEVIATING FROM THE PATTERN, I DID NOT SEE THE 3RD ON ILS SHORT FINAL. SEE DRAWING ON BACK. CORRECTION AND PREVENTION: THIS ARPT IS BY FAR TOO BUSY TO REMAIN UNCONTROLLED. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: REPORTER STATES HE DID A GO AROUND AND SO DID OTHER PLT WITH WHOM HE HAD NMAC. REPORTER STAYED LOW OVER TXWY UNTIL DETERMINED WHAT OTHER ACFT WAS PLANNING TO DO. SAYS FIELD HAS ABOUT 4 FBO'S ON FIELD, AN ILS, VOR AND NDB APCH SO MANY INSTRUCTORS USE AS A TRAINING AREA. MANY INSTRUCTORS AND STUDENTS DO NOT USE CTAF BECAUSE JUST TOO BUSY. HE MAY CONTACT FAA TO SEE IF TFC WARRANTS A TWR. SAYS THEY HAVE MORE TFC THAN STAPLETON.
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.