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Electronic Flight Bag (EFB) Hazard Assessment Study

Federal Aviation Administration's study on potential hazards of electronic flight bags (EFBs) in aircraft, testing scenarios and risks. Visit http://www.fire.tc.faa.gov for more information.

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Electronic Flight Bag (EFB) Hazard Assessment Study

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  1. Federal Aviation Administration Electronic Flight Bag (EFB) Hazard Assessment International Aircraft Systems Fire Protection Working GroupAtlantic City, NJ November 17, 2011 Steve Summer Federal Aviation AdministrationFire Safety Branch http://www.fire.tc.faa.gov

  2. Background • EFBs are electronic devices used to replace the paper materials typically found in the pilot’s Flight Bag. • They are divided into three classes: • Class I – Portable electronic device (PED), Commercial off the Shelf (COTS) equipment, used as loose equipment and stowed during portions of flight • Class II – PED, can be COTS equipment, mounted and connected to aircraft power during flight for use and charging. • Class III – Considered installed equipment, these are not PED, or COTS equipment, but rather are pieces of equipment built and tested specifically for aircraft EFB use.

  3. Background • Class I EFBs are considered portable electronic devices (PEDs) and are not subject to airworthiness standards. • Class II EFBs are also considered PEDs, and are not subject to airworthiness standards, however their mounting/charging connection hardware are. • Class III EFBs are subject to airworthiness standards, as they are considered installed equipment. • Responsibility for class I and class II EFBs falls under FAA flight standards

  4. Proposed Testing • A brief set of tests is planned to assess the potential hazard posed by class I and class II EFBs. • Laptop outfitted with a high capacity (7.2 Ah) Li-Ion battery will be installed in cockpit of FAA Fire Safety 737. • Battery has been modified, replacing one of the battery cells with a small cartridge heater, used to initiate thermal runaway. • Thermocouples placed on the cartridge heater, and one adjacent battery cell. • Smoke meter installed across pilot and co-pilot stations. • Gas sampling (CO, CO2, O2) locations at pilot and co-pilot stations.

  5. Proposed Testing • Laptop will be placed in the cockpit within a mesh cage to prevent any damage to aircraft. In addition, all flammable material (carpeting, seat cushions, etc) from the cockpit has been removed. • Two test scenarios will be conducted and documented (filmed): • Resulting fire will be extinguished immediately following first battery event. Subsequent events of adjacent batteries will be monitored. • Resulting fire will be allowed to continue for as long as possible without endangering the aircraft. • Video of test, along with smoke and gas concentration data should provide a good assessment of what hazard is being introduced into the cockpit through the use of EFBs.

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