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FAA issues directive on Boeing 737 circuit breaker problem

Federal Aviation Administration announced on Wednesday that it has issued an airworthiness Directive for all Boeing 737 MAX 8 and 8200 aircraft to address a "circuit breaker" issue which could cause a malfunction leading to excessively high cabin temperatures.

The directive calls for the revision of the aircraft flight manual in 30 days so that the crew is aware of the?operational procedures' if an air conditioner malfunctions due to a circuit breaker trip. The FAA stated that the directive applies to 2,119 aircraft worldwide, including 771 U.S. registered airplanes.

Boeing said it supported the directive it issued last week that mandated guidance. Boeing said that it was working on an engineering solution to eliminate this possibility.

FAA reported that two incidents in flight where temperatures onboard the aircraft increased dramatically were recently reported. Boeing has said that the fault is in the ground wire of the air conditioning system.

The FAA stated that the malfunctioning air conditioning system could lead to an "uncontrollable" excessively high temperature. This could result in injury or incapacitation to flight crew and passengers.

Boeing stated that it expects a fix for the 737 MAX 7 or 10 to be available before certification.

Southwest Airlines, the airline that was involved in one of the reported incidents said they are in close contact with the FAA and Boeing regarding the issue. They have also informed their flight crews on the correct steps to take to address the electrical fault.

(source: Reuters)