What Common Issues Affect A Piper Comanche For Sale?

As a pilot considering a classic aircraft purchase, what problems should I inspect for in a Piper Comanche during pre-buy? Fuel tanks, corrosion, gear mechanisms?
2026-02-02 03:18:55
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Coda
Coda
Bibliophile Editor
For a used Comanche, you'd want a thorough pre-purchase inspection focusing on corrosion in the steel tube fuselage structure, especially around the landing gear and tail, plus the condition of the fuel tanks which can develop leaks. AD compliance logs for the wing spar are critical too. On a lighter note, if you're dealing with mechanical headaches, I was recently reading 'Trouble in Paradise', which features a protagonist whose vacation goes completely sideways after a series of bizarre and frustrating mechanical failures with his supposedly reliable transport, capturing that specific feeling of plans crumbling due to unexpected breakdowns.
2026-07-18 22:33:34
40
Bennett
Bennett
Novel Fan Doctor
I like to nerd out on the systems, so when I look at a Comanche for sale I scan the electrical and avionics list first. Many Comanches were born before glass panels and modern redundancy, so outdated wiring, single alternator setups, legacy gyro systems driven by vacuum pumps, and tired batteries are common. That vacuum pump thing matters — when pumps start failing you lose your attitude indicator and heading gyro unless the panel has been upgraded. On the engine side, watch for signs of oil leaks around valve covers and the sump, odd smoked exhaust, or a pattern of frequent top-end jobs; those are red flags that maintenance might have been deferred. Fuel system issues also pop up: corroded fuel lines, sticky selector valves, and unreliable fuel quantity senders that throw off range planning.

If the plane has an STC engine or prop conversion, get the paperwork and inspect the installation closely; some conversions are brilliant, others less tasteful. Finally, don’t underestimate the cost and benefit of avionics modernization — fitting ADS-B, WAAS GPS, and a digital transponder may be necessary and isn’t cheap, but it makes flying the Comanche far more pleasant and legal in many airspaces. I get a kick out of keeping older birds flying, but I tally those upgrade costs before I sign any offer.
2026-02-03 05:25:32
18
Finn
Finn
Honest Reviewer Mechanic
I tend to get sentimental about classics but keep my wallet realistic. Many Comanches for sale have tasteful owner upgrades — engine STCs, modern props, or updated avionics — but those mods bring paperwork headaches and sometimes weight-and-balance or certification quirks. Common items I see listed: AD compliance entries that are incomplete, patched floors from past interior work, and tired upholstery. Owners also often underestimate recurring costs like annual inspections, prop overhauls, and insurance for older single-engine retractables.

Part scarcity isn’t usually a deal-breaker — communities and suppliers keep Comanche parts moving — but expect to hunt for specific trim or gear components. A good sign is detailed, chronological logs and recent major items (recent top overhaul, gear overhaul, or avionics install). I love chatting with other owners about creative STCs and long trips, and a well-maintained Comanche can be a joy for cross-country flying; I’d just budget for surprises and enjoy the ride while it lasts.
2026-02-04 11:11:43
14
Hazel
Hazel
Insight Sharer Police Officer
Every time I walk past a Comanche sitting in a hangar it hits me how much character these planes bundle into a single Airframe — and that character comes with a handful of predictable issues buyers should expect. Older Comanches tend to show corrosion in hidden places: wing roots, flap channels, and around inspection plates where moisture collects. That often means expensive sheet-metal work or unexpected time in the shop. The retractable gear is another recurring headache; seals, hydraulic hoses, and actuators age, and owners frequently report sticky gear, slow cycling, and the odd hydraulic leak that looks small until you start tearing panels apart.

Engine-wise, high-time Lycomings are common, so compression checks, oil-consumption history, and evidence of cylinder work are crucial. Carburetor or fuel-injection quirks, leaky fuel tanks or bad senders, and magneto/ignition service are typical. Avionics can be ancient — expect vacuum pump issues for the gyros, obsolescent radios, and the need for ADS-B/modern GPS retrofits. Always comb through the logs for AD compliance and past damage history; a cosmetically nice paint job can hide deeper structural or engine problems. I still love the way a Comanche handles in the pattern, but if you buy one, budget for a thorough prebuy and a realistic maintenance plan — it’ll save tears and dollars down the line.
2026-02-05 10:09:55
4
Reagan
Reagan
Longtime Reader Mechanic
A hangar-buddy tone: I talk like someone who’s spent long nights troubleshooting stubborn systems and I’ve learned to look at aircraft like stories with chapters. For Comanches, the structural chapter often brings up old repairs that were never fully documented — patch panels, rivet patterns that don’t match factory drawings, or primer showing through where paint has flaked. Those whisper 'open up the panels.' Landing gear parts — bushings, actuator seals, and the retraction motor — tend to show age in ways you won’t notice from a glossy exterior photo. Operationally, pilots report fuel selector headaches and inaccurate tanks, so I always open the wings and verify the tanks, senders, and selector positions.

Maintenance diaries matter: if you find spotty entries or big gaps, question fuel storage practices (water in tanks accelerates corrosion) and whether the plane was hangared. Finally, be mindful of the ongoing cost of keeping a vintage panel flying: vacuum pumps, radio replacements, and occasional engine work are part of the Comanche lifestyle. I still get a kick out of the clean lines and solid cruise speed, so with the right expectations it’s a rewarding airplane to own.
2026-02-06 02:51:59
29
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How do I inspect a piper comanche for sale before buying?

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5 Answers2026-02-02 15:21:48
Crunching the numbers and listings over the past year, I’d peg the average asking price for a Piper Comanche in flying condition right around $100k to $150k, with a market median usually near $120k. That’s a loose average because those airplanes span a wide spectrum: early low-horsepower PA-24s and well-used airframes can be down in the $50k–$80k range, while upgraded 250/260 models with modern avionics and fresh engines push into the $150k–$250k territory. What really moves the needle are engine time and avionics. A Comanche with an engine near TBO, fresh logs, autopilot, and a Garmin retrofit will command a premium, whereas one needing an engine overhaul, corrosion repair, or a paint and interior job drops the price a lot. Don’t forget location: hangar availability and local demand can swing asking prices by thousands. Personally, I love hunting for the ones that have character but only need avionics to shine. If I were buying, I’d budget beyond the purchase price for an inspection, possible ADS-B/GPS upgrades, and a contingency for an engine shop visit—those costs change the effective price a surprising amount, and that’s part of the thrill for me.

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