Background HH-60G Service Life
Joint Aircraft Condition Evaluations: Airframe cracks on USAF 1981/82 lot 1 HH-60Gs with 6,000+ flying hours
Only appeared only on UH-60As with far more flying time
USAF operates HH-60G helicopters heavier and faster
WR-ALC, the SPO sent ACC a memo on 5 Nov 97
“A conservative estimate has the aircraft structural becoming increasingly maintenance intensive at around 7,000 hours of operations.”
Service life estimate from US Army specification of 8,000 hours
Structural enhancements could extend life to 10,000 hours.