there is a great article aboUt TS1400 by Ibrajim Sunnetci in aviation Turkey magazine 2019
"The conventional methodology for measuring this lifespan and one that’s used by many engine manufacturers is known as the TAC (Total Accumulated Cycles) Life. One TAC is the equivalent of one cycle of an engine (exactly: one excursion from engine start, passing intermediate power rating and back to engine stop). The average lifespan of the TS1400 is expected to be at least 2,500 cycles, while the target for the service life is 5,000 cycles (TAC). After 2,500 or 5,000 cycles the TS1400 will require a general overhaul."
so we can say 5000 TAC is achieved
Aviation Turkey
www.aviationturkey.com
