Test of T53-L-13 Engine (S/N LE-14083).
ARMY AVIATION TEST BOARD FORT RUCKER ALA
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Development of the T53-L-13 engine is a major product improvement effort for UH-1 helicopters. Phase F logistical evaluation test of production models of these engines was directed by US Army Test and Evaluation Command USATECOM on 8 February 1966. Testing of this engine was initiated by the US Army Aviation Test Board USAAVNTBD in January 1967 and has been continuous since that time. Subject engine was the high-time test engine in the program when in July 1968, a fourth-state compressor disc failure occurred at 1,946 flight hours. At 1,199.3 operating hours, the 36-blade second-stage compressor disc was removed due to cracks in the disc tenons. A 34-blade second-stage compressor disc was then installed and operated 747.4 hours prior to engine failure. Inspections of fourth-stage discs which have operated beyond the 1,200-hour level in test engines are required to prior to consideration of an increase in TBO of T53-L-13 engines. Further testing is required on the 34-blade second-stage disc configuration prior to consideration of an increase in TBO of T53-L-13 engines. Major improvements in the compressor discs are required to increase their service life.
- Jet and Gas Turbine Engines