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Ace Your 107
UA.IV.A.K2

During a preflight inspection, a remote pilot notices the small UA's battery casing is distorted (bulging). Per AC 107-2A's Small UAS Condition Chart, what should this prompt?

Why: AC 107-2A's Table C-1, Small UAS Condition Chart, lists "Battery casing distorted (bulging)" as a condition requiring the pilot to "further inspect to determine integrity of the battery as a reliable power source," noting that "distorted battery casings may indicate impending failure resulting in abrupt power loss and/or explosion," posing a risk to "aircraft performance characteristics, and flight duration."

  • Dismisses a condition the chart explicitly flags as a possible sign of impending battery failure.
  • Invents an unsafe response; adding payload does nothing to address a battery integrity concern and would further strain a power source that may already be failing.

UA.IV.A.K2Source: AC_107-2A.pdf, Appendix C, Table C-1, p. C-3Reviewed 2026-10-22

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