A Basic “MCAS” System was installed in the Boeing 707 in the 1960s. Read...
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November 1, 2019 - by Oliver Stuart Menteth for leehamnews.com
It was simplistic in design, had a graduated and limited input into the pitch control system and details were included in the relevant training, operational and maintenance manuals.
It worked seamlessly and because of this its existence, and reason for installation, has eluded most people in the industry. The system was installed not as a result of a recommendation or regulation imposed by the FAA but at the insistence of the Air Registration Board (now the Civil Aviation Authority) of the United Kingdom.
Prior to the introduction of the European Aviation Safety Agency (EASA) each country, should it elect to, was responsible for approving each model and variant destined to be operated by their own domiciled carriers.
As a result of its own aircraft manufacturing industry the United Kingdom (UK) was in reality the only other country in the world that could effectively complete an independent airworthiness review of an aircraft.
Each foreign aircraft that was to be registered with the UK authorities underwent a review of its design and, equally important, was also subject to rigorous flight tests.
In his book Handling the Big Jets (first published in 1967) D. P. Davies, formally head of the flight test department of the UK Air Registration Board (ARB), now the CAA, describes at length the different stalling characteristics exhibited by aircraft with different wing and tail configurations.
He personally test-flew every new jet aircraft model that was destined to fly with UK operators, such as BOAC and BEA.
Davies also describes the various control systems that were incorporated on both British and American aircraft that reduced the possibility of a line pilot entering a stall. Details of flying characteristics and the use of automated control systems at high angles of attack are also included.
Davies is best known for mandating the fin of the Boeing 707 be lengthened by approximately 36 inches in order to achieve published...
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