Pacific Propeller International

Pacific Propeller International has been in continuous operation from Kent, Washington since 1946 — one of the oldest independent propeller repair-and-overhaul stations in North America, and the only commercially licensed repair station in the world authorised to overhaul the Hamilton Standard 54H60 propeller system used on the Lockheed C-130 Hercules and the Lockheed P-3 Orion. Eighty years on, the firm operates from a 64,000-square-foot repair-and-overhaul facility on the south side of Sea-Tac, holds sole-source repair contracts with the United States Air Force for foreign-military-sales support of the C-130 fleet, and works on Dowty and other propeller systems fitted to a defined roster of regional turboprop airframes.

The firm is an FAA and EASA repair station specialising in the disassembly, non-destructive inspection, component overhaul, reassembly, dynamic balance, and functional test of variable-pitch aircraft propeller assemblies. Its principal work is the 54H60 four-blade system fitted to the C-130 and P-3 (variants of which are operated by the US military and by the air arms of several dozen allied nations); its Dowty work covers metal-bladed propellers fitted to the CASA C-212, the British Aerospace Jetstream 31, and the Fairchild-Swearingen Metroliner and Merlin. Beyond the airframes named in its formal repair-station authorisations, the firm carries the parts inventory, tooling, and instrumentation that let it handle propeller work end-to-end without subcontract — a discipline the C-130 support mission specifically requires.

Two things distinguish Pacific Propeller among aerospace MRO firms: the sole-source position on the 54H60 system, and the continuity of the operation. The 54H60 is the propeller of the American strategic airlift and maritime-patrol arsenal, and having the only commercially licensed repair station for that system means the firm’s Kent facility is a single point of American industrial support for one of the most heavily depended-upon Western military airframes still in service. The eighty-year continuity of the shop — through the transition from piston to turboprop, from wartime to Cold War to modern coalition operations — is not decorative continuity but the substantive foundation of the qualification: a propeller repair station of that depth is built over decades, not started.