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Preflight check of available power

Remote Pilot (Part 107) practice question 12 of 19 on Operations / Emergency Procedures. ACS element UA.V.C.K2c · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONUnder § 107.49, what must the remote pilot in command ensure before flight regarding the power supply of a powered small unmanned aircraft?

  1. AThat enough power is available for the intended operational time
  2. BThat the battery is fully charged to 100 percent before every takeoff
  3. CThat a spare battery is carried on board the aircraft
Show the answer and explanation

Correct answer: A. That enough power is available for the intended operational time

  • A — correct § 107.49(d) requires the remote pilot in command to ensure there is enough available power for the small UAS to operate for the intended operational time.
  • B — incorrect The regulation sets no specific charge percentage; it requires enough power for the intended operational time.
  • C — incorrect Part 107 does not require a spare battery to be carried; the requirement concerns sufficient power for the planned operation.

BACKGROUND

Section 107.49 lists the actions a remote pilot in command must take before each flight. Among them, paragraph (d) states that if the small unmanned aircraft is powered, the pilot must ensure there is enough available power for the small unmanned aircraft system (UAS) to operate for the intended operational time. Because most small UAS run on lithium batteries, this check is a core part of safe battery usage. Running out of power in flight can lead to an uncontrolled descent, so the check is a preventive emergency measure. The same section also requires checking the control links and securing any attached objects.

STUDY TIP

Tie battery usage to § 107.49(d): the preflight standard is enough power for the intended operational time, not a fixed percentage.

KEY POINTS

  • § 107.49(d) requires enough available power for the intended operational time.
  • The rule applies whenever the small unmanned aircraft is powered.
  • No specific charge percentage or spare battery is mandated by part 107.

SOURCES

  • 14 CFR 107.49(d)
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MORE ON OPERATIONS / EMERGENCY PROCEDURES

SkyDrill is not affiliated with the FAA. This is an original practice item based on 14 CFR part 107, 14 CFR part 89, and the FAA Remote Pilot – Small UAS Study Guide (FAA-G-8082-22). Regulations and handbooks are revised; confirm details against the current edition.