The Federal Aviation Administration (FAA) has issued an airworthiness notification for the Boeing 787 aircraft family and the implementation of the 5G network.
Operators of Boeing 787s must take extra measures when landing on wet or snowy runways at airports where 5G C-band service is implemented, according to the FAA’s airworthiness notification of January 14, 2022.
“The FAA determined anomalies on Boeing Model 787-8, 787-9, and 787-10 airplanes due to 5G C-Band interference which may affect multiple airplane systems using radio altimeter data, regardless of the approach type or weather,” the FAA airworthiness notification said.
“These anomalies may not be evident until the airplane is at low altitude during approach. Impacted systems include, but are not limited to: autopilot flight director system; autothrottle system; engines; thrust reversers; flight controls; flight instruments; traffic alert and collision avoidance system (TCAS); ground proximity warning system (GPWS); and configuration warnings.”
“During landing, this interference may inhibit effective transition from AIR to GROUND mode, which may have many repercussions,” the letter continued. As a result, there may be a lack of thrust reverser and speedbrake deployment, as well as increased idle thrust; brakes may be the only way to slow the plane down.
As a result of the presence of 5G C-Band interference, deceleration performance may be compromised, landing distance increased, and runway excursion increased.”
All Boeing 787-8, 787-9, and 787-10 planes have been notified.
The FAA said on January 16, 2022 that around 45 percent of the commercial fleet in the United States has been authorized to execute low-visibility landings at many of the airports where 5G C-band will be implemented on January 19, 2022.
Some Boeing 737, 747, 757, 767, MD-10/-11, and Airbus A310, A319, A320, A321, A330, and A350 types were approved by the FAA. More approvals are expected from the FAA in the coming days.
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