Model PT6B-67A

The initial models in the PT6B Series was derived directly from the legendary PT6T Twin-Pac®, benefiting from its renowned dependability and performance. The 1,000 shaft horsepower class PT6B series, a single engine configuration, has been produced in 6 models and its versatility has been demonstrated in a wide variety of applications. More recently, the PT6B-67A engine was developed with the PT6C-67A and PT6C-67C engine models providing the basis. More than 350 PT6B series engines power aircraft in service with 63 operators in 17 countries, having accumulated more than one million flying hours in such applications as emergency medical service, business and utility operations.

Operators of PT6B series engines are supported by P&WC’s industry-leading global customer support. This includes over 30 P&WC-owned and designated service facilities around the world, more than 100 field support representatives on all major continents, a 24/7 Customer First Centre for rapid expert support, the most advanced diagnostic capabilities for this market and the largest pool of P&WC rental and exchange engines in the industry. P&WC’s helicopter engine support has also been consistently ranked No. 1 by operators in Pro Pilot magazine’s annual powerplant support survey.

PT6B Series engines incorporate the latest technologies in the drive to exceed our customers’ expectations in performance, reliability, durability, fuel consumption and environmental friendliness. Six PT6B models have been produced ranging in shaft horsepower power from 900 to over 1,000 shaft horsepower. Key innovative design features have been introduced to the PT6B Series over the years to further increase its appeal in the market. The PT6B-37A features an automatic fuel control and an electronic power turbine governor with a manual back-up – a feature unique for single engine operations.

The PT6B Series is derived directly from the PT6T-3D power section with an offset output gearbox, including clutch system. The basic engine configuration is exactly the same as that of the PT6T and PT6A turboprop, i.e. a two-shaft configuration consisting of a multi-stage compressor driven by a single-stage compressor turbine and an independent shaft coupling the power turbine to the output shaft through the offset reduction gearbox. In fact, the base engine hot section is very similar to the PT6A-34 airline turboprop, thus continuing the heritage of airline-level dependability in P&WC’s helicopter engines.

Single-PT6 power section with output gearbox

• Integral clutch system

Multi- stage axial and single-stage centrifugal compressor

• Reverse flow, radial inlet with screen for FOD (Foreign Object Damage) protection
• 3-stage axial and 1-stage centrifugal

Reverse flow combustor

• Low emissions, high stability, easy starting, durable

Single-stage compressor turbine

• Cooled vanes to maintain high durability

Independent ‘free’ power turbine with shrouded blades

• Forward facing output for fast hot section refurbishment

Automatic fuel control and electronic power turbine governor with a manual back-up

	Thermodynamic Power Class?* (Shaft Horsepower)	Mechanical Power Class?* (Shaft Horsepower)	Output Shaft Speed (RPM)	Height** (Inches)	Width** (Inches)	Length** (Inches)
PT6B-37A	1,000	900	4,373	35	19.5	64.5
PT6B-36 Series			6,409	32	19.5	59.2

*Powers are approximate values at take-off. Available at sea level, standard day, static conditions, uninstalled.

** Dimensions are approximate values.

• Agusta AW119 Koala