Pratt & Whitney JT3D-3B
A Pratt & Whitney JT3D turbofan model approved for Boeing 707-300B and related 707 applications; the -3B is retained as an exact model rather than collapsed into the JT3D/TF33 family.
Identity
- Aliases
- JT3D-3BJT3D-3B turbofan
- Domains
- aviation
- Identity Level
- model
- Kind
- turbofan
- Name
- Pratt & Whitney JT3D-3B
- Status
- unknown
Details
- Air Breathing Specs
- Max Thrust Kn
- 80.1
- Description
- A Pratt & Whitney JT3D turbofan model approved for Boeing 707-300B and related 707 applications; the -3B is retained as an exact model rather than collapsed into the JT3D/TF33 family.
- Developers
- Family
- Manufacturers
Links
Assets & Meta
- Creation Time
- July 31, 2026 at 06:43:55 UTC
- Updated Time
- July 31, 2026 at 06:43:55 UTC
Other
- Sources
- Accessed Date
- 2026-07-31
- Note
- FAA AC 20-76 identifies the JT3D-3B as an approved engine for the Boeing 707-300B and records four-engine installations across the 707 type-certificate variants.
- Publisher
- Federal Aviation Administration
- Title
- AC 20-76 — Maintenance Inspection Notes for Boeing 707/720
- Accessed Date
- 2026-07-31
- Note
- Boeing's historical 707 specification identifies four 18,000-pound-thrust P&W JT3D turbofans for the 707-320; 18,000 lbf is represented as approximately 80.1 kN.
- Publisher
- Boeing
- Title
- Boeing Products — 707 historical specifications
- Accessed Date
- 2026-07-31
- Note
- Provides the JT3D turbofan model context and its place in the JT3D family.
- Publisher
- Smithsonian National Air and Space Museum
- Title
- Pratt & Whitney JT3D-1 Production Prototype Turbofan Engine