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Major changes beyond the authority of the service bulletins require amendments to the type certificate. For example, increasing (or decreasing) an aircraft's flight performance, range and load carrying capacity by altering its systems, fuselage, wings or engines resulting in a new variant may require re-certification.
As of July 1, 2016, these restrictions were lifted for "most Jabiru-powered aircraft in Australia. Stock Jabiru engines that are maintained in strict accordance with Jabiru service bulletins and maintenance instructions are no longer affected by the limitations, which were issued in late 2014." [19]
The aircraft involved was a Boeing 737-7H4 [b] with manufacturer's serial number 27880, fuselage line number 601, and registered as N772SW. [3] The aircraft had been in service with Southwest Airlines for nearly 18 years since its manufacture in 2000. [4] It was powered by two CFM International CFM56-7B24 engines. [2] [5]
The Limbach L1700 is a series of type certified German aircraft engines, designed and produced by Limbach Flugmotoren of Königswinter for use in light aircraft and motorgliders. [1] The series were originally designated as the SL1700 under its former certification and was changed to L1700 by company Service Bulletin no. 17. [2]
An airworthiness directive (commonly abbreviated as AD) is a notification to owners and operators of certified aircraft that a known safety deficiency with a particular model of aircraft, engine, avionics or other system exists and must be corrected.
As of July 1, 2016, these restrictions were lifted for "most Jabiru-powered aircraft in Australia. Stock Jabiru engines that are maintained in strict accordance with Jabiru service bulletins and maintenance instructions are no longer affected by the limitations, which were issued in late 2014." [11]
In November 2012, Cessna issued a Mandatory Service Bulletin (MSB) as a result of cracks found on its cyclic test aircraft. The MSB requires addition of new wing ribs and modifications to the wing attachment structure for the first 228 Cessna 162s built. The modification was extensive, required 32 man-hours to complete and was required to be ...
In July 2017, GE Aviation issued a Service Bulletin recommending that airlines perform regular inspections of first- and second-stage disks of all CF6 engines built before 2000. [ 12 ] On January 30, 2018, the National Transportation Safety Board (NTSB) issued its final report on the accident involving American 383. [ 1 ]