Presented for sale is an exceptional 1980 Piper Navajo Chieftain with the Colemill Panther STC conversion — one of the most capable piston twins available at this price point. This aircraft features brand-new 4-blade Hartzell Q-tip propellers with only 2.0 hrs TSMOH, all-new 2024 fuel cells, and a fresh April 2026 annual inspection with no ADs outstanding. The Panther conversion adds intercooled engines, winglets, and upgraded nacelles for improved climb, cruise, and single-engine performance over the stock Chieftain. The exterior was freshly painted in 2023 in a striking white base with blue​/​light blue accent scheme, and the interior features light gray leather club seating with burgundy carpet and walnut cabinetry throughout. This is a turn-key, ready-to-fly twin — ideal for owner-operators, island hoppers, charter operations, or anyone stepping up into a capable multi-engine platform. Last Annual: April 8, 2026 All ADs current — No new ADs due (checked via T-Data TBX 4​/​8​/​2026) ELT battery replaced — expires December 2027 April 2026 Annual Work Performed Differential compression checks — both engines all cylinders 72–78​/​80 Oil & filter service — both engines (Aero Shell W100 ​/​ 15W50) New Tempest filters installed — both engines Air intake filter assemblies replaced Spark plugs removed, cleaned and reinstalled — both engines Both fuel pump assemblies replaced — overhauled units Right main gear down-lock spring replaced Both vacuum filters replaced Both hydraulic filters replaced ELT inspected per FAR 91.207(d) — battery replaced Both propellers serviced — Aeroshell #6 grease, 25 PSI nitrogen AD compliance checked — no new ADs outstanding Exterior: 8​/​10 — Painted 2023 Interior: 8​/​10 — Light gray leather Engines: Mid-time Props: Fresh OH Specifications subject to verification upon inspection. All times in service recorded as of last scheduled shop visit. Aircraft subject to sale or withdrawal from market at any time.

Manufacturer year

1980

Serial Number

31-8052054

Registration Number

N348GG

Make/Model

Piper navajo chieftain ​/​ panther

Airframe

Total Airframe Time: 8,809 hrs Left Engine (TIO-540-J2B) S​/​N L-2190-61A — SMOH: 1,257.5 hrs Right Engine (LTIO-540-J2B) S​/​N RL-434-68A — SMOH: 1,497.5 hrs Left Prop (HC-C4YR-2​/​FC7663DB-6Q) S​/​N FH483 — TSMOH: 2.0 hrs Right Prop (HC-C4YR-2L​/​FJC7663DB-6Q) S​/​N FH474 — TSMOH: 2.0 hrs

Avionics

Garmin GNS 530 WAAS — GPS​/​NAV​/​COMM King KFC-200 Autopilot with Yaw Damper King KI-525 Flight Director Collins AMR-350 Audio Panel with Audio​/​Marker Collins VHF-251 COM II ​/​ VIR-351 NAV I Garmin GTX330 Transponder (primary) Garmin GTX320A Transponder (secondary) Bendix​/​King Color Radar Bendix​/​King Radar Altimeter BFG Storm Scope ADF — Collins 650A DME — Collins DME

Interior/Exterior; Additional Equipment

Interior 7-place cabin with 4 club seats (tray tables), 2 aft forward-facing seats, 2 crew seats — all covered in light gray leather. Burgundy carpet with matching side walls and curtains. Forward left & right walnut cabinets plus 1 aft walnut cabinet. Exterior Overall white base with blue​/​light blue accent trim. Freshly painted in 2023. New brake discs and tires. Recent pilot windshield installed. Condition Additional Equipment Winglets Wing Lockers Cargo Door Sigtronics SPA-400 Intercom Electric Trim ELT Artex ME406 Davtron Volts Indicator Astro​/​Tech Quartz Clock EI EGT Gauges Shadin Fuel Computer with Fuel Totalizer Engine Intercoolers (Panther STC) Dual Caliper Cleveland Brakes Cold Factory A​/​C System

Aircraft Model Overview (Reference only)

The Piper PA-31-350 Navajo Chieftain is an unpressurized twin-piston aircraft produced by Piper Aircraft Corporation in Vero Beach, Florida, from 1973 through 1984. The definitive and most capable variant of Piper's PA-31 Navajo family, the Chieftain introduced a stretched fuselage and counter-rotating engines relative to the original PA-31-310 Navajo, delivering the ten-seat capacity and symmetric single-engine handling that made it the workhorse of regional commuter aviation, charter operations, and corporate transport throughout the 1970s and 1980s. More than 1,800 Chieftains were produced, and the type remains actively flown in commercial and owner-operated roles across six continents — a testament to the soundness of Piper's engineering and the depth of the type's support infrastructure. Two Lycoming TIO-540-J2BD turbocharged and fuel-injected horizontally-opposed six-cylinder engines, each rated at 350 horsepower, drive three-blade Hartzell constant-speed full-feathering propellers in a counter-rotating configuration. The turbocharging system maintains rated power to altitude, enabling efficient cruise in the low flight levels where the Chieftain finds its most practical operating regime. Fuel injection eliminates carb ice as an operational concern and provides consistent power delivery across the altitude and temperature range. The TIO-540 family is well-supported by an established Lycoming overhaul and parts network, though the turbocharger system adds maintenance complexity and inspection requirements relative to naturally aspirated alternatives. Buyers should budget for turbocharger inspections, exhaust system AD compliance, and intercooler condition as part of ongoing ownership cost. The PA-31-350 airframe represents a 24-inch fuselage stretch over the original PA-31-310, providing the additional cabin length that enables the ten-seat high-density configuration while maintaining the broad-shouldered fuselage cross-section that gives the Navajo family its practical cabin volume advantage over the Cessna 402 and Beechcraft Baron series. The all-metal low-wing construction with hydraulically-actuated retractable tricycle gear is robust and well-proven across decades of high-utilization commercial service. The airstair door on the left aft fuselage — a defining feature of the Chieftain — allows self-contained passenger loading and deplaning without ground support equipment, a practical advantage at the small regional airports and remote strips that formed the backbone of the Chieftain's commercial operating environment. The ten-seat cabin in typical commuter or charter configuration accommodates a pilot and nine passengers across a club-style forward section and a rear bench arrangement, or up to six passengers in executive club-four layouts with additional baggage space. The flat aisle floor, adequate headroom for average-build passengers, and good window placement deliver a workmanlike but functional cabin environment suited to short- and medium-haul Part 135 operations. The 1980 model year panel reflects the mature production specification of the Chieftain's mid-production run — most active examples carry updated avionics of varying configuration, and RVSM compliance, ADS-B Out, and weather radar installation should all be verified on any specific airframe. The Chieftain's commercial operational history is unmatched among piston twins of its era — the type formed the backbone of regional commuter networks in the United States, Australia, New Zealand, Africa, and South America, accumulating high-cycle utilization that tested and validated every aspect of the airframe and systems design. This heritage translates directly into a maintenance knowledge base, parts availability, and A&P familiarity that is deeper for the Chieftain than for virtually any other piston twin in the certified market. The Piper Owner Society and a global community of Chieftain operators and maintenance providers ensure that parts and expertise remain accessible across major aviation markets worldwide. In the current market, the 1980 Piper PA-31-350 Navajo Chieftain represents one of the most practical and capable entries into unpressurized twin-piston ownership for Part 135 operators, charter companies, and owner-pilots who require genuine ten-place capacity or high-utility cargo capability at an accessible acquisition cost. Engine times — both TIO-540s must be evaluated independently — turbocharger condition, exhaust system AD compliance, and avionics currency are the primary pre-purchase priorities. Type-specific training is required by most insurers and is strongly recommended regardless of the underwriter's position. For operators who know the type and maintain it properly, the Chieftain remains a durable, capable, and commercially proven platform that continues to earn its keep across a wide range of operational profiles.