Aviation English
Emergencies

What is Battery-Only Power?

Battery-Only Power A condition where the aircraft’s electrical system is operating solely on battery power, typically due to the failure of all generators or external power sources.

Source: ICAO Doc 9432, FAA PCG

How is “Battery-Only Power” Used in Practice?

ATC, be advised we are on battery-only power, all generators offline, requesting priority landing.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

Related Aviation English Terms

Hydraulic System FailureLanding Gear MalfunctionDouble Engine FailureAvionics Bay Smoke

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Frequently Asked Questions

What is Battery-Only Power?

A condition where the aircraft’s electrical system is operating solely on battery power, typically due to the failure of all generators or external power sources.

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