Pratt & Whitney JT4A-3&5 series
1 aircraft on the U.S. register carry a Pratt & Whitney JT4A-3&5 series engine, rated at about 15,800 pounds of thrust. The Cessna 550 Citation II is the model most often fitted with it (1 aircraft).
The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Pratt & Whitney JT4A-3&5 series. FAA spelling: JT4A-3&5SER.
Where they are owner's state
Kind of aircraft
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Pratt & Whitney JT4A-3&5 series the component layer
The design is held under 1 type certificate (E-291, held by Pratt & Whitney Division). The FAA has issued 9 airworthiness directives (orders that owners must comply with) that name this engine series.
FAA orders 9 airworthiness directives · newest first
Certificates and bulletins
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how this engine series links to the rest of the register
- Cessna 550 Citation II 1 with this engine series
- Tennessee 1 of these aircraft
- Dialysis Clinic INC 1 of these aircraft
- FAA orders naming the Pratt & Whitney JT4A-3&5 series 9 airworthiness directives
These connections as data: /graph/engine/pratt-whitney-jt4a-3-5-series.json · about the eFlight graph.
Aircraft newest certificates first · 1
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.