Battery & Equipment Maintenance Flashcards

What is the recommended action when a LiPo battery's capacity has dropped to 80% of its original rated capacity?

Answer: Retire the battery from flight operations — it has degraded beyond safe use limits

A LiPo battery that has lost 20% or more of its rated capacity should be retired from active flight use. Degraded batteries are more susceptible to voltage sag under load, which can cause a sudden power cut mid-flight. Manufacturers typically specify 80% remaining capacity as the service limit.

Why should LiPo batteries never be charged on or near flammable materials?

Answer: LiPo batteries can catch fire or explode if they fail during charging — a LiPo-safe bag or fireproof charging container should always be used

LiPo batteries can experience thermal runaway — a self-reinforcing overheating reaction that can result in fire or explosion. Charging on a flammable surface dramatically increases the risk of fire damage. LiPo-safe bags or fireproof charging cases contain the hazard if a fire occurs.

What should a commercial drone operator record in their equipment maintenance log?

Answer: All flights, battery cycle counts, repairs, firmware updates, propeller replacements, and any incidents or anomalies

A comprehensive maintenance log tracks the entire service history of the drone and its components. This is essential for detecting patterns of wear, knowing when to replace components proactively, providing evidence of airworthiness if challenged, and supporting warranty claims or incident investigations.

What is the significance of a drone manufacturer's specified 'maximum wind speed rating' for a commercial operator?

Answer: Operations must not take place when wind speeds exceed this rating — it defines the aircraft's safe operating envelope

The manufacturer's maximum wind speed rating defines the operational envelope for which the aircraft was designed and tested. Exceeding this limit risks loss of control because the drone's motors cannot maintain stable flight against stronger winds. Commercial operators must check forecast and actual wind conditions before and during flight.

How should a drone operator manage firmware updates before a commercial assignment?

Answer: Update firmware before the assignment and allow time for a test flight to verify correct operation before the commercial flight

Firmware updates should be applied well in advance of a commercial assignment to allow time for testing. A test flight after any firmware update verifies that all systems function correctly with the new software. Updating immediately before a critical flight risks discovering unforeseen issues during a commercial operation.

What pre-flight equipment check should a commercial operator perform on the remote controller?

Answer: Check battery charge level, antenna condition, control input response, and confirm correct pairing with the drone

The remote controller is the pilot's primary means of controlling the drone. Pre-flight checks should confirm it is fully charged, all antennas are undamaged and correctly oriented, control inputs produce the expected aircraft responses, and the controller is correctly paired and communicating with the drone.