Electronic Flight Bag

Electronic flight bag (EFB) is an electronic information management device that helps flight crews perform flight management tasks more easily and efficiently with less paper. It is a general purpose computing platform intended to reduce, or replace, paper-based reference material often found in the pilot's carry-on flight bag, including the aircraft operating manual, flight-crew operating manual, and navigational charts (including moving map for air and ground operations). In addition, the EFB can host purpose-built software applications to automate other functions normally conducted by hand, such as performance take-off calculations.

The EFB gets its name from the traditional pilot's flight bag, which is typically a heavy (up to 40 lb/18 kg or more) documents bag that pilots carry to the cockpit. The electronic flight bag is the replacement of those documents in a digital format. EFB weights are typically 1 to 5 pounds (0.5 to 2.2 kg), about the same as a laptop computer, and a fraction of the weight and volume of the paper publications. There are numerous benefits for using an EFB but specific benefits vary depending on the size of the operation, type of applications used, the existing content management and distribution system, the type of applications deployed. Some common benefits include: weight savings by replacing the traditional flight bag, reduced medical claims from handling traditional flight bags, reduced cost, and increased efficiency by reducing or eliminating paper processes. There are also claims of increased safety and reducing pilot workload.

According to the FAA's Advisory Circular (AC No. 120-76A), an Electronic Flight Bag is an electronic display system intended primarily for cockpit/flightdeck or cabin use.

There are also militarized variants, with secure data storage, night vision goggle compatible lighting, environmental hardening, and military specific applications and data.

EFB devices can display a variety of aviation data or perform basic calculations (including performance data and fuel calculations.). In the past, some of these functions were traditionally accomplished using paper references or were based on data provided to the flight crew by an airline's "flight dispatch" crew.

For large and turbine aircraft, FAR 91.503 requires the presence of navigational charts on the airplane. If an operator's sole source of navigational chart information is contained on an EFB, the operator must demonstrate the EFB will continue to operate throughout a decompression event, and thereafter, regardless of altitude. The only way to achieve this capability is by using a solid state disk drive or a standard rotating mass drive in a sealed enclosure.