LegiStorm

Summary:
What GAO Found

Twenty-four of the 30 commercial service airports that responded to GAO's survey and interviews reported experiencing a total of 321 electrical power outages—i.e., an unplanned loss of power lasting 5 minutes or longer—from 2015 through 2022. Eleven of these airports reported having six or more outages over this 8 year period. Airports reported that these outages affected a range of airport operations and equipment (see table). Not all responding airports were able to provide detailed information about their outages, and some provided estimates about affected activities.

Reported Effects of a Portion of Electrical Power Outages on Selected Airport Activities and Equipment, 2015-2022 (percentage of outages)


Airport activity or equipment affected


Yes


No


Don't know


Baggage handling


34%


30%


35%


Concessions


22%


26%


50%


Other (e.g., automated people movers, escalators)


18%


9%


15%


Gate/boarding


16%


34%


49%


Check-in/ticketing


16%


33%


50%


Parking


14%


34%


52%


Communications


13%


32%


54%


Flight delays & cancellations


11%


30%


59%

Source: GAO analysis of airport survey responses. | GAO-23-105203

Note: Airports provided responses on whether outages affected specific airport activities or equipment for 114 of the 321 electrical power outages, with the exception of flight delays and cancellations, for which information was provided for 119 outages. Percentages may not add up to 100 due to rounding or missing responses. For more details, see table 1 in GAO-23-105203.

Selected airports reported taking several actions to improve the electrical power resilience of their airports, including (1) conducting electrical infrastructure assessments, (2) undertaking projects to improve electrical infrastructure, and (3) installing equipment to generate additional backup power. For example, 40 of the 41 airports GAO interviewed reported planning or completing an infrastructure project to increase electrical power resilience. Of these, four airports reported installing microgrids. Such microgrid systems are capable of independently generating, distributing, and storing power.

The Federal Aviation Administration (FAA) is administering new and expanded grant programs and issuing guidance to support airports' electrical resilience efforts. For example:

Airport Improvement Program funding eligibility was expanded to include the Energy Supply, Redundancy, and Microgrids Program projects, which may include certain electrical power resilience projects.
The new Airport Terminal Program provides funding for airport terminal development projects, including those that may strengthen resilience.
FAA issued program guidance and conducted airport outreach to help increase airports' awareness of available federal funding for resilience projects.
Why GAO Did This Study

The nation's commercial service airports require continuous, reliable electricity to power airfield operations and airport facilities. FAA and airports are responsible for ensuring the resilience of airports' electrical power systems—including the ability to withstand and recover rapidly from electrical power disruptions.

GAO was asked to review major power outages at airports and steps federal agencies and airports are taking to minimize future disruptions. This report describes (1) the extent to which selected airports reported they had experienced electrical power outages since 2015, (2) actions selected airports have taken to improve the resilience of their electrical power systems, and (3) actions FAA has taken to help airports develop and maintain resilient electrical power systems.

GAO conducted semi-structured interviews with officials from 41 selected airports of varying sizes, representing 72 percent of passenger enplanements. GAO administered a follow-up survey to these 41 airports, focusing on the extent to which they had experienced electrical outages; 30 responded to the survey, representing 53 percent of total enplanements. GAO also reviewed applicable statutes and regulations and analyzed funding data to identify examples of electrical power projects. Further, GAO interviewed FAA officials and airport, academia, state government, and energy stakeholders.

For more information, contact Heather Krause at (202) 512-2834 or KrauseH@gao.gov.