MH-60 SLAP
Abstract
MH-60 SLAP is assessing the primary aircraft structure and subsystem condition of the MH-60 fleet in order to evaluate the airframe's ability to meet its designed service life of 10,000 hours. SLAP will determine the efforts necessary to extend the aircraft design life limits to meet Chief of Naval Operations (CNO) operational inventory requirements through FY 2040. The highest flight time MH-60S helicopters are expected to exceed the design life limit in 2026, at which time as many as 30 aircraft per year could be removed from flight status without a SLAP and follow-on Service Life Extension Program (SLEP). The highest flight time MH-60R helicopters are expected to exceed the design life in 2034. MH-60 SLAP is comprised of two distinct assessments: investigative inspections and analysis of fleet assets, which will identify current trends that either prohibit the MH-60 from reaching its design life or the required life based on operational inventory requirements; and forward-looking analysis, which will identify future risks not yet realized on fleet assets. These assessments will consider the fatigue life of airframe structure as well as the health of aircraft subsystems. The airframe structural assessment consists of investigations of the cockpit beams, main gearbox beams/frames, upper deck, engine mount, lower tub, main landing gear, tail landing gear, cargo hook, transition splice and tie-down fittings/structure, tailcone, tail gearbox, intermediate gearbox, stabilator, manufactured joints/splices, and flight controls support structure. The aircraft subsystems assessment will evaluate wiring, engines, rotor brake, hydraulic, flight controls, avionics components and infrastructure, etc., to identify over-and-above inspections, overhaul intervals or replacement schedules to fly beyond the current design limit assumption. Assessment findings will be used to determine the technical requirements for a future SLEP. FY 2025 budget requests funds to continue the SLAP analysis and engineering development that needs to occur to extend the useful life of the MH-60S and ramp the SLAP effort on the MH-60R, to include high-time fleet aircraft detailed inspections/assessments until transition to Future Vertical Lift-Maritime Strike (FVL-MS). Design and development engineering will utilize data from fatigue life assessment, inspection intervals, component replacement intervals, and other strategies to develop the Engineering Change Proposals (ECP's) for the phased MH-60S SLEP solution, and modifications to current maintenance practices.
Document Details
- Document Type
- Project
- Publication Date
- Oct 01, 2025
- Source ID
- 3384_0702207N_7_1319_PB_2025
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