Depot Maintenance (NON-IF)
Abstract
3030: A significant portion of the F/A-18 and EA-18G airframe is believed to have additional inherent capability and a life extension may be possible for many portions of the airframe. The F/A-18 Service Life Assessment Program (SLAP) is assessing the structural and subsystem conditions of the F/A-18 fleet in order to determine what modifications are necessary to extend the aircraft designed life limits to allow it to achieve Chief of Naval Operations (CNO) inventory requirements. Without SLAP and the follow on Service Life Extension Program (SLEP), aircraft are retired from the USN inventory when a design service life metric is reached. RDTE funds will support aircraft teardown to validate SLAP analysis, identify unknown fatigue areas and assess the aircraft's material condition. 3182: The T-45 aircraft structure is currently fatigue limited to 14,400 flight hours based on initial full-scale fatigue tests. This service life limit prevents the T-45 fleet from meeting Integrated Production Plan (IPP) past 2025. Studies demonstrate that the 14,400 flight hour service life can be extended, with a Service Life Extension Program (SLEP), to 21,600 flight hours, which will support meeting IPP until 2035. A T-45 Structural Service Life Assessment Program (SLAP) was completed in February 2012. In order for the T-45 to meet IPP until 2035, it is also necessary to assess the subsystems of the T-45 in their ability to remain viable. In FY13 an initial subsystem assessment, based on the updated fleet aircraft usage spectrum and future predicted training missions of the T-45 aircraft, found 79 dispositions requiring further analysis, teardowns, age explorations, recertification and/or testing . The assessment of the subsystems that make up these 79 dispositions will address all critical subsystems required and their ability to maintain IPP/NTR until 2035, analysis and studies will be conducted to outline improvements, assess manufacturing capabilities, prototype redesign and test of subsystems for trainer aircraft. 3384: The MH-60 SLAP is assessing the primary aircraft structure and subsystem condition of the MH-60S fleet in order to assess the airframe's ability to meet its designed service life of 10,000 hours and to determine what efforts are necessary to extend the aircraft design life limits to allow it to meet Chief of Naval Operations (CNO) operational inventory requirements through FY 2035. Without SLAP, aircraft are retired from the USN inventory when design service life limits are reached directly impacting fleet surface warfare, mine countermeasures, search and rescue, and vertical replenishment operational capabilities. FY 2020 budget request funds the completion of external loads analysis, continuation of fatigue analysis, and development of initial dispositions for safety critical items. This initial analysis, assessment and disposition will be further refined throughout the SLAP effort, augmented with specific system teardown, inspection and test, culminating in a follow-on SLEP recommendation, which will design and implement the solutions resulting from the SLAP findings. 9999: FY 2019 Congressional Add funds MH-60S analysis and development of the 401D engine; the procurement of MH-60 alignment, tail cone, and pylon fixtures to support SLAP analysis, development of engineering technical data, drawings/models and associated lists from the Original Equipment Manufacturer (OEM) in support of SLAP deep look inspections. JUSTIFICATION FOR BUDGET ACTIVITY: This program is funded under OPERATIONAL SYSTEMS DEVELOPMENT because it includes development efforts to upgrade systems that have been fielded or have received approval for full rate production and anticipate funding in the current or subsequent fiscal year. The FY 2020 funding request was increased by $1.668 million to add EA-18G SLAP tasking to the budget.
Document Details
- Document Type
- R2 Budgetary Justification
- Publication Date
- Oct 01, 2020
- Source ID
- 0702207N_7_1319_PB_2020
- Change Summary Explanation
- Technical: PU 3182: Increase from FY2018 to FY2019 due to the T-45 SLAP Aviation Technical Corrections. PU 3030: Funding increase of $1.668 million from FY 2019 to FY 2020 for addition of EA-18G SLAP tasking. PU 3384: Decrease from FY 2019 to FY 2020 due to the completion of Subsystem Life Assessment. PU 9999: Decrease from FY 2019 to FY 2020 due to the T-700-401D Software development and MH-60 alignment tool to support SLAP analysis being a one time FY19 Congressional add. Schedule: PU 3030: Changes to the schedule to reflect the addition of EA-18G SLAP. PU 3182: Changes support product development beginning in FY19 for Subsystem SLAP C to include teardown, inspection, detailed analysis and recertification testing required to safely extend the service life of critical subsystems. PU 9999: Changes to the schedule to reflect the addition of T-700-401D Software development and MH-60 alignment tool.
- Service Agency Name
- Navy
Entities
Organizations
- United States Navy
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