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Reporter stated that while conducting a power line patrol; a helicopter had a near midair collision with an agricultural aircraft that was not observed on the TCAS unit in the helicopter.
| Attributes | |
| ACN | 1711230 |
| Time | |
| Date | 201911 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Helicopter |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Route In Use | Other Inspecting powerlines |
| Flight Plan | VFR |
| Component | |
| Aircraft Component | Traffic Collision Avoidance System (TCAS) |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Commercial Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 51 Flight Crew Total 2027 Flight Crew Type 54.6 |
| Events | |
| Anomaly | Conflict NMAC Deviation - Procedural Published Material / Policy |
| Miss Distance | Horizontal 200 Vertical 200 |
Narrative:
On the morning of [date]; a [helicopter] that was conducting a power line patrol for [company] incurred a mid-air near miss with an agriculture aircraft. It is unknown what the crop duster mission was but comments from crew are that it appeared to be flying enroute along the same power line as the [helicopter] crew and not engaged with any spraying operations. When the aircraft was observed; the crew made an abrupt flight control input to avoid contact and then returned to base once clear of traffic.it should be noted that the TCAS on [the helicopter] was installed and operational but did not go off so we suspect the air tractor had no transponder or if equipped; it was not turned on.
Original NASA ASRS Text
Title: Reporter stated that while conducting a power line patrol; a helicopter had a near midair collision with an agricultural aircraft that was not observed on the TCAS unit in the helicopter.
Narrative: On the morning of [Date]; a [helicopter] that was conducting a power line patrol for [company] incurred a mid-air near miss with an Agriculture Aircraft. It is unknown what the crop duster mission was but comments from crew are that it appeared to be flying enroute along the same power line as the [helicopter] crew and not engaged with any spraying operations. When the aircraft was observed; the crew made an abrupt flight control input to avoid contact and then returned to base once clear of traffic.It should be noted that the TCAS on [the helicopter] was installed and operational but did not go off so we suspect the air tractor had no transponder or if equipped; it was not turned on.
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.