UPDATE Continental reveals engine problem grounding some Cirrus aircraft

Continental IO-520 engine
An IO-520 engine from Continental. Photo: Continental

UPDATE Continental Aerospace Technologies has explained the engine problem that caused Cirrus Aircraft to ‘pause’ flying some of its company SR piston singles.

The aircraft affected are SR22 and SR22T models produced between June 2021 and February 2023 – estimated by Flight Global at around 700 aircraft worldwide. Cirrus continues to operate its SR20 aircraft.

See also: Cirrus grounds company aircraft after engine problem revealed

A detailed statement issued by Continental said:

“Continental has identified a potential safety of flight issue for aircraft equipped with Continental 360, 470, 520, [and] 550 series engines and replacement crankshaft assemblies. Consequently, Continental is preemptively advising that an inspection should be performed to confirm that the crankshaft counterweight retaining ring was properly installed in new and rebuilt engines assembled between June 1, 2021, and February 7, 2023. This advice also applies to replacement crankshaft assemblies manufactured between June 1, 2021, through February 7, 2023.

“Continental proactively recommends that all flights powered by the aforementioned engines with less than 200 operating hours be limited to 5 additional flight hours with the essential crew to position the aircraft at a maintenance facility. To further clarify, Continental engines with over 200 hours may continue normal flight operations. A service bulletin with affected serial numbers will be forthcoming.”

UPDATE: The Mandatory Service Bulletin has now been issued and can be downloaded here. There’s also a list of Frequently Asked Questions (and answers).


Crankshaft image from Continental

We understand that no aircraft has had an engine failure. The issue was discovered during an inspection, AOPA reports.

Continental Aerospace Technologies


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