FAA Part 107 Remote Pilot (UAG)OperationsEasy
During a preflight inspection, a remote pilot in command identifies a small crack on one of the sUAS's propeller blades. The sUAS is otherwise fully functional. What is the most appropriate course of action, according to FAA regulations and best practices?
- ASand down the edges of the crack to minimize aerodynamic interference and then proceed with the flight.
- BReplace the damaged propeller with a new, undamaged propeller before conducting any flight operations.
- CApply a small piece of electrical tape over the crack and monitor it during the flight.
- DProceed with the flight, but reduce the maximum operating altitude to compensate for potential instability.
Show answer & explanationAnswer & explanation
Correct answer: B. Replace the damaged propeller with a new, undamaged propeller before conducting any flight operations.
Any damage to a propeller, including a small crack, can lead to imbalance, increased vibration, and potential catastrophic failure during flight. FAA regulations and best practices require that a sUAS be in a condition for safe operation. The only safe and acceptable action is to replace the damaged propeller before flight.
Why the other options are wrong
- A. Sanding down a crack further weakens the propeller's structure and is not an approved repair method.
- C. Tape is not a structural repair and will not withstand the forces on a propeller, making this an unsafe option.
- D. Operating with a damaged propeller is inherently unsafe and risks loss of control or component failure, regardless of altitude.
sUAS Propeller Damage
Any visible crack, chip, bend, or deformation on a sUAS propeller blade that compromises its structural integrity or balance.
- Can cause severe vibration and instability.
- Increases risk of in-flight failure.
- Requires immediate replacement, not repair.
Memory trick: A 'Cracked' prop equals 'Crash' risk; 'Change' it first!