Piper PA-31T3-500 T-1040

Overview

The Piper PA-31T3-500 T-1040 is a rare commuter turboprop developed in the early 1980s by mating the unpressurized fuselage of the Chieftain with the wings, tail, and PT6A-11 engines of the Cheyenne I. Piper certified the type in 1982 and built only 24 airframes through 1984, targeting the third-level commuter airline market that needed turbine reliability without the cost or complexity of a pressurized cabin.

The design rationale was specific: short-haul feeder routes typically run under 200 miles, where pressurization adds weight and cost without operational benefit. The result is an 11-passenger turboprop with a useful load above 3,800 lbs, capable of operating from 3,000 ft strips and burning Jet A. Most units served regional carriers like Bar Harbor Airlines and Sunbird Airlines before the deregulation era reshaped commuter aviation.

Key Features for GA Buyers

• Payload Utility: Without pressurization equipment, the T-1040 carries an exceptional useful load (3,800 lbs+), making it well suited to cargo, jump operations, or high-density passenger configurations.
• Turbine Reliability: Pratt & Whitney Canada PT6A-11 engines deliver 500 shp per side with 3,600 hr standard TBO, significantly more reliable and longer-running than the piston Chieftain’s Lycoming TIO-540s.
• Cabin Volume: The stretched Chieftain fuselage seats up to 11 in commuter configuration, or holds substantial cargo with seats removed and an optional belly pod fitted.
• Short-Field Capability: Wing loading and engine power yield landing distances under 2,200 ft, opening regional fields that jet operators cannot serve.

Trade-offs

• Unpressurized: Service ceiling is 24,000 ft but most operations run between 10,000 and 14,000 ft, leaving the aircraft below most weather rather than above it.
• Rarity: With only 24 built, type-specific parts and experienced maintenance are increasingly difficult to source. Many components are shared with the Cheyenne I and Chieftain, but unique hybrid items have no aftermarket.
• Fuel Burn: Cruise burn near 66 GPH is roughly double that of a piston Chieftain, eroding the economic case for low-utilization private operators.
• Limited Resale Market: The combination of small fleet size, commuter-spec interiors, and aging avionics keeps the secondary market narrow.

See Also

• Piper Cheyenne I – the pressurized engine sibling sharing the PT6A-11 powerplant. Compare
• Piper PA-31-350 Chieftain – the piston-powered fuselage donor, still in widespread commuter and freight service. Compare
• Beech King Air 90 – the dominant pressurized PT6A-class turboprop the T-1040 was meant to undercut. Compare
• Beech King Air 100 – a slightly larger commuter turboprop competitor with proven third-level operator support. Compare
• Piper PA-31P-350 Mojave – the pressurized piston sibling on the same PA-31 fuselage family. Compare