This RFI is for Air Force market research to identify sources capable of modifying the MH-139A with a parallel battery relay system that enables simultaneous main and auxiliary battery use during engine starts to mitigate cold-weather hot-start issues. The Government’s known baseline is Leonardo Service Bulletin SB 139-360 Rev C, Part II, kit P/N 4G2430F00713, or an equivalent FAA-approved modification meeting the same requirement, with airworthiness data to support an FAA STC and military ECP. Respondents must address technical integration (OFP/CAS/FADEC, -40°C transient-voltage analysis, Part 145 certification), technical data packages, sustainment/tooling, training-device impacts, facility suitability, throughput, and crew/manhour assumptions. Pricing must exclude the physical batteries and include only installation hardware and retrofit work; respondents should provide ROM costs split between NRE and per-aircraft kit/installation, plus development, testing, delivery, and first-aircraft IOC timelines. Responses should demonstrate existing capability, supply-chain stability, and technical support qualifications, including business-size status and small-business utilization, with proprietary information clearly marked.

The Air Force Life Cycle Management Center’s MH-139A Program Office is conducting market research to identify sources for a Parallel Battery Relay modification enabling simultaneous main and auxiliary battery use during engine starts in austere cold-weather conditions. The baseline is Leonardo Service Bulletin SB 139-360 Rev C, Part II, or an equivalent FAA-approved modification, with vendors required to provide engineering data supporting an FAA STC and military ECP plus technical data for aircraft and training-device integration. Pricing must exclude the physical batteries and cover only installation hardware and retrofit labor, while responses should address technical capability, logistics and sustainment, facility suitability and parallel throughput, ROM costs for NRE and per-aircraft kit/installation, estimated development/testing/kit-delivery/IOC timelines, maintenance man-hour assumptions, and small-business utilization. Interested parties must demonstrate Part 145 certification, supply-chain and sustainment support, tooling and consumable requirements, and ability to support future engineering revisions and training updates.