Product-Improvement Test (TBO Extension) of 42-Degree Gearbox (Part Number 204-040-003-23)
ARMY AVIATION BOARD FORT RUCKER AL
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The majority of the UH-1 dynamic components are removed for overhaul or retirement at 1,100-hour intervals. Extension of the time between overhaul TBO of major dynamic components of the UH-1 helicopters would improve the worldwide supply posture and availability rate, and would provide a substantial savings.