The Boeing 737 MAX affected by a new problem, this time with anti-icing

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After the FAA, Transport Canada issued a new directive for Boeing 737 MAX aircraft in Canada, requiring airlines to limit use of the system anti-icing motor for safety reasons.

The directive was prompted by a similar directive from the Federal Aviation Administration (FAA) of the United States, which concluded that prolonged use of the anti-icing system, designed to prevent the formation of ice in the engine during operation, under conditions ofdry air could cause damage to the engine inlet cover.

The US aviation regulator has warned airlines operating Boeing 737 MAX aircraft to limit engine anti-icing because under certain circumstances the engine’s outer casing could overheat beyond its design limit and detach in flight. . The broken part could damage the plane or injure passengers seated near the windows and in the rear section of the plane, according to the Federal Aviation Administration (FAA) airworthiness directive issued last Tuesday.

Under the directive, by August 25, airlines operating Boeing 737s equipped with series turbofans CFM LEAP-1B will have to revise their flight manual to limit the use of engine anti-icing in dry air to less than five minutes. The relevant part of the minimum equipment list should also be revised.

The decision by Transport Canada was also motivated by the results of in-flight evaluations which indicated that prolonged use of the engine anti-icing system in dry air under specific conditions could lead to excessive heating and “serious damage to the engine inlet cowl”. The resulting damage could potentially cause sections of the engine cowling to detach, posing a risk to the aircraft’s fuselage and windows.

The Canadian directive concerns 108 Boeing 737 MAX aircraft operated in Canada and comes into force on August 25. Airlines like Air Canada, WestJet And Flair Airlines acknowledged the directive, saying it will not affect passenger service.

It should be remembered that recurring problems with the engine Pratt and Whitney PW1100G, which powers theA320neo, are pushing airlines towards LEAP engines. In India, for example, Air India operates approximately 24 A320neo and 5 A321neo aircraft powered by LEAP-1A engines. The recent directive only applies to the engine LEAP-1B, which largely powers the Boeing 737 MAX. The LEAP-1B entered service in May 2017.


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