EASA grounds R-R Tay for checks..

[Smudger98]

Rolls-Royce Tay 611-8 engines, mostly installed on Gulfstream IV series business jets, are grounded subject to a European Aviation Safety Agency emergency airworthiness directive until a modification solution is found.

EASA says: "These engines are known to be installed on, but not limited to, Gulfstream Aerospace G-IV, GIV-SP and GIV-X aeroplanes." Fokker 70s and Fokker 100s are also Tay-engined, but a different variant.

The airworthiness directive says: "A recent quality investigation by Rolls-Royce Deutschland has identified that certain Stage 2 high pressure turbine (HPT) disc spanner retaining nuts did not receive the proper heat treatment after application of silver plating. This condition, if not corrected, could result in a Stage 2 HPT disc failure, possibly leading to release of high energy debris, resulting in damage to the aeroplane and/or injury to occupants. For the reason described above, this Emergency AD requires the removal of the affected engines from service." EASA adds: "This AD is considered to be an interim action, pending availability of approved instructions for corrective action, which would allow these engines to be released to service."
c/o - http://www.flightglobal.com/news/articles/easa-grounds-r-r-tay-for-checks-369341/