FAA Part 107 Remote Pilot (UAG)OperationsMedium
A remote pilot is preparing to launch a sUAS from a rooftop landing pad. The preflight inspection reveals that one of the propellers has a minor chip on the leading edge and appears slightly bent compared to the others. What is the most appropriate action for the remote pilot?
- AConduct a brief test hover to assess flight stability before proceeding.
- BProceed with the flight, but limit the sUAS's speed and altitude.
- CAttempt to straighten the bent propeller and smooth the chip with sandpaper.
- DReplace the damaged propeller with a new, balanced one before flight.
Show answer & explanationAnswer & explanation
Correct answer: D. Replace the damaged propeller with a new, balanced one before flight.
Any damage, chip, or bend to a propeller can cause imbalance, leading to excessive vibrations, reduced efficiency, increased stress on motors/bearings, and potential catastrophic failure. Replacing it with a new, balanced propeller is critical for safe operation.
Why the other options are wrong
- A. A test hover might not reveal all issues and could still lead to problems during a full flight, especially if the damage is significant.
- B. Operating with a damaged propeller is unsafe and can lead to further damage or loss of control.
- C. Attempting to repair a propeller in the field is not recommended as it's difficult to ensure proper balance and structural integrity.
Propeller Damage/Balance
Any physical damage (chips, bends, cracks) or imbalance in sUAS propellers can lead to unsafe flight conditions, vibrations, and potential system failure.
- Crucial for stable and efficient flight.
- Damage causes imbalance and vibrations.
- Always replace damaged propellers with new, balanced ones.
Memory trick: Propellers are 'perfect' or 'problem' – no in-between.