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A helicopter student and instructor reported a near midair collision when they were overtaken on short final by a NORDO aircraft.
| Attributes | |
| ACN | 1651225 |
| Time | |
| Date | 201906 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | BJC.Tower |
| State Reference | CO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Robinson R44 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | VFR Route |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | PA-28 Cherokee/Archer/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Flight Plan | VFR |
| Person 1 | |
| Function | Pilot Not Flying Instructor |
| Qualification | Flight Crew Instrument Flight Crew Commercial Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 1020 Flight Crew Type 800 |
| Person 2 | |
| Function | Pilot Flying |
| Qualification | Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Student |
| Experience | Flight Crew Last 90 Days 17 Flight Crew Total 305 Flight Crew Type 93 |
| Events | |
| Anomaly | Conflict NMAC |
| Miss Distance | Horizontal 100 Vertical 50 |
Narrative:
Near miss. We were in a helicopter cleared to land on a practice ILS approach. A piper cut in front of helicopter 0.5 miles off of the arrival end. Instructor came on controls to perform evasive action. The helicopter proceeded to ask tower about the aircraft. Tower informed us the other aircraft did not have a transponder and was not making radio calls. After shut-down; the helicopter pilots talked to the piper pilot to find out cause. It was determined that the piper had an electrical failure. The piper pilot squawked 7600; but tower did not give him light gun signals. He made his own judgement call to land without clearance. It is unclear if he had the helicopter in sight.
Original NASA ASRS Text
Title: A helicopter Student and Instructor reported a NMAC when they were overtaken on short final by a NORDO aircraft.
Narrative: Near miss. We were in a helicopter cleared to land on a practice ILS approach. A Piper cut in front of helicopter 0.5 miles off of the arrival end. Instructor came on controls to perform evasive action. The helicopter proceeded to ask Tower about the aircraft. Tower informed us the other aircraft did not have a transponder and was not making radio calls. After shut-down; the helicopter pilots talked to the Piper pilot to find out cause. It was determined that the Piper had an electrical failure. The Piper pilot squawked 7600; but Tower did not give him light gun signals. He made his own judgement call to land without clearance. It is unclear if he had the helicopter in sight.
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.