Sukhoi Civil Aircraft has ordered the inspection of 48 Superjets for cracks in uncertified titanium that may have been used in about 50 SSJ100 aircraft. Russian sources report the potential for micro cracks in landing gear, engine, and flap attachment points allegedly made with uncertified titanium. An airworthiness directive from Rossaviatsiya date 29 December 2018 may support those claims.
Sukhoi indicated earlier this week that it had addressed the concerns about the questionable titanium in Superjet
parts, and refers to a February 6th Rossaviatsiya AD confirming that SCAC had inspected all of the suspect parts and confirmed their quality, as well as tests performed on the chemical composition the titanium ingots by VSMPO-Avisma, confirming compliance.
Analysis
The SSJ100 was intended to be the first Russian aircraft that would be competitive with Western product, using a number of western suppliers and aiming at levels of reliability comparable to products from Airbus and Boeing. Unfortunately, that did not happen, and Brussels Airlines ended planned SSJ100 operations earlier this year to aircraft complexity and long downtimes. Sukhoi has failed to deliver the western levels of reliability that it needs to effectively compete internationally.
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