Engineering Study on Interchangeability of Dowty R391 Propellers between C 27J and HC 130J

The U.S. Coast Guard Aviation Logistics Center is issuing a Sources‑Sought notice (Solicitation 70Z03826IE0000005) to obtain independent engineering input on whether Dowty R391 propellers accumulated on the C‑27J (part R391/6‑132‑F/10) can be overhauled and placed into service on the HC‑130J (part R391/6‑132‑F/3). Respondents must evaluate the technical, airworthiness, and sustainment implications of an OEM‑supported versus a government‑only acceptance path, develop a go/no‑go recommendation with defined conditions and required mitigations, and provide a data package for airworthiness review and ACMS updates. The study must include a detailed engine‑mount compatibility analysis, hazard assessments (FHA, FMEA, FTA), mapping to MIL‑HDBK‑516C, MIL‑STD‑1530C, and MIL‑STD‑882, and a risk register defining acceptance thresholds for fatigue margins, dynamic stability, inspection intervals, and supportability. The Government will supply applicable TCTOs, life‑limit documents, maintenance manuals, overhaul instructions, service‑bulletin histories, mission usage data, serialized propeller histories, and OEM points of contact; however, no aircraft modifications are preferred and any required changes must be clearly identified with cost, schedule, and airworthiness impacts. Respondents must submit the attached “70Z03826IE0000005 Sources Sought Notice Response” form, including company name, address, telephone, point of contact, and answers to questions on product specifications, weight and dimensions, required modifications, estimated lead‑time, and small‑business status (including any 8(a), HUBZone, women‑owned, SDVOSB, or disadvantaged certifications). Additional information on GSA schedule listings, existing government users, and civilian points of contact is also requested. This Sources‑Sought response will inform the USCG’s market research and may lead to a future solicitation on SAM.gov.

Notice ID

38843d69ca4a4869bc1249bb50036aaf

Solicitation Number

70Z03826IE0000005

NAICS Code

541330

Classification Code

N/A