Cessna 414

This page describes the original Cessna 414, 1970-1977 — the tip-tank airplane with 100 usable gallons and a 6,350 lb gross weight. The 1978-1985 414A Chancellor is a substantially different machine and is at Cessna 414A Chancellor.

The 414 was Cessna's answer to a specific question: how do you sell a pressurized cabin-class twin to an owner who wants the Cessna 340A's simple, direct-drive engines but needs more cabin than the 340 has? The answer was to put the 421's fuselage on the 401/402's tip-tank wing with direct-drive TSIO-520s. It worked, and it is still the cheapest way into a pressurized cabin-class twin.

Pressurized, and the certificate's own paperwork records it — the 414 Owner's Manual warns that using heated alternate air requires the pressurization switches in DUMP and that "if the flight is above 10,000 feet, all occupants should use oxygen or an emergency descent procedure should be initiated". That is the line that separates this airplane from the 402B it shares a wing with.

The tip tanks are the catch. 100 usable gallons on two 310 hp turbocharged engines is not much endurance, and it is the single reason the 414A exists: the 1978 redesign more than doubled usable fuel to 206 gallons and added four and a half feet of span to do it. If you are comparing a 414 against a 414A, that is the comparison — not the panel, not the paint.

Inside the 414 the certificate records four separate serial splits, which is more than any other section of A7CE.

Airspeed limits — three blocks, none a majority:

The largest block is only 47%, which the catalogue's rules treat as a thin majority, and the rule for a thin majority is to store the lower figure. Here the lowest block is also the largest, so both tests agree. A late 414 from S/N 414-0801 is a slightly faster-limited airplane than this page shows — 5 knots more Va, 5 more Vno, 5 more Vne — and those limits are stated in indicated rather than calibrated airspeed.

Engines: TSIO-520-J or -JB to S/N 414-0800 (800 airframes); TSIO-520-N or -NB from 414-0801 (165 airframes). Both blocks are 310 hp. A late 414 therefore carries the same engine family as a 414A, which is worth knowing for parts and for shop familiarity.

Manifold pressure: 36.0 in. Hg to S/N 414-0800, 38.0 in. Hg after — with no change in rated power.

Seats and baggage: 6 or 7 to S/N 414-0350 with baggage stations summing to 930 lb; 6, or 7 with the toilet option, from 414-0351 with stations summing to 1,090 lb. The page stores the later, larger block (615 airframes, 64%).

See Maintenance Ecosystem.

Parts: fair, and leaning on the used market. Textron does not support these airplanes directly. The direct-drive TSIO-520 is well supported; tip-tank-specific airframe parts are not.

Mechanics: specialist. Pressurization plus turbocharged Continentals is not general A&P work, though the direct-drive engine widens the pool considerably compared with a 421.

Engine reserve: $58,000 per engine at overhaul, multiplied by two by the cost model. At the 1,700-hour TBO carried on this page that is roughly $34 per engine per hour and $68 per hour for the airplane, before removal and installation.

Other recurring items: turbochargers, propeller overhauls, exhaust components, pressurization consumables, gear overhauls, and the spar inspection cycle.

Wing carry-through spar cap. The 400-series spar AD campaign is the highest-consequence item on any of these airplanes, and the 414 is named in it. A spar replacement can exceed the value of the airframe. Verify documented compliance against the AD's own applicability list before anything else.

Exhaust systems. Turbocharged Cessna twin exhaust failures put exhaust gas into the engine compartment and the cabin. Pressure checks and V-band coupling inspections are recurring items and the parts are consumables.

Pressurization. Door seals, outflow valves and the cabin pressure controller are wear items on an airplane now around fifty years old, and a leaking seal usually points at deferred maintenance elsewhere.

Structural retirement lives — TCDS A7CE NOTE 3. The certificate assigns mandatory retirement lives "which may not be changed without FAA Engineering approval" to windshields on the 414 at 13,200 hours, with the part number depending on serial range (there are separate entries for S/N 414-0001 thru 414-0600 and 414-0601 and On). On a pressurized airplane the windshield is a pressure-vessel component.

Ice protection. A7CE records demonstrated compliance with FAR 23.1419 for the 414 from S/N 414-0601 and On when equipped per Cessna Drawing 5114400 and Factory Kit No. 194. Earlier 414s are not covered by that finding. Verify by drawing and kit number rather than by a de-ice boot's presence.

Corrosion. Wing lower surfaces, gear wells, bulkheads. Coastal or unheated-hangar history warrants a structural look.

See GA Insurance Underwriting.

A pressurized cabin-class piston twin, which is among the hardest general aviation classes to insure. Expect four figures of total time with several hundred hours multi-engine, dual in type before solo PIC, and annual recurrent training. Hull values on a 414 are lower than on a 414A or 421C, so liability is a larger share of the premium, but the pilot requirements are the same.