FAA Part 107 Remote Pilot (UAG)OperationsMedium
A remote pilot is conducting a sUAS aerial survey near a high-voltage power line corridor. The sUAS begins to exhibit erratic control inputs and GPS signal loss, despite clear weather and a healthy battery. What is the most likely cause of this behavior?
- AA software glitch requiring a firmware update.
- BElectromagnetic interference (EMI) from the power lines.
- CPropeller imbalance causing excessive vibration.
- DA sudden change in wind shear conditions.
Show answer & explanationAnswer & explanation
Correct answer: B. Electromagnetic interference (EMI) from the power lines.
High-voltage power lines generate strong electromagnetic fields that can interfere with a sUAS's electronic components, including its GPS receiver and control systems, leading to erratic behavior and signal loss.
Why the other options are wrong
- A. While possible, a sudden software glitch manifesting exactly at the power lines is less likely than EMI, which is a common hazard in such environments.
- C. Propeller imbalance would typically cause vibration and potentially affect flight stability, but not directly lead to GPS signal loss or erratic control inputs across the board in this specific scenario.
- D. Wind shear affects flight stability and control, but does not typically cause GPS signal loss or the specific type of erratic control associated with EMI.
Electromagnetic Interference (EMI)
Disruption of operation of an electronic device when it is in the vicinity of an electromagnetic field (EM field) in the radio frequency spectrum that is generated by another electronic device.
- Can affect sUAS GPS, compass, and control signals.
- Common sources include power lines, radio towers, and industrial equipment.
- Can cause erratic flight, signal loss, and flyaways.
Memory trick: Electronic noise makes drones lose their poise.