1971 Cessna 421B
Multi Engine Piston
Aircraft Details
Seller reportedAvionics & Equipment
IFRDescription
Reduced! Very well maintained C421B. PS Engineering Audio Panel, Garmin 530W, GTX 330 ES, KX155, STEC 55X auto pilot, May 24 annual. Electric 134 converted Air Conditioning (you can run on the ground without engines) We have known this plane for 20 years. It has served 3 different owners very well. All original logbooks since new. Might consider single engine in trade.
Engine
Compression at July 25 annual; 74, 74, 73, 73, 72, 72.
Interior
New seats and side panels. Excellent condition.
Exterior
Paint is in overall great shape. The aircraft has a clear coat. There a few paint chips which could be touched up.
Inspection
Annual due August 1, 2026 IFR 411/413 due May 1, 2026
Modifications / STCs
• Electric Air Works great!
• JPI Engine Monitor
• Hoskins 2,000 fuel flow totalizer
Description and equipment details provided by the seller. AeroGurus does not verify seller-provided information.
Price Comparison 1 active offer
| Source | Price | Location | Listed | Days on Market | Status | Action |
|---|---|---|---|---|---|---|
|
Optisky
controller.com
|
$150,000
|
Addison, TX | Mar 25, 2026 | — | Active | |
|
Optisky
aviationtrader.com.au
|
$154,668
|
Addison, Texas, Australia | Apr 04, 2026 | — | Active | |
|
Optisky
controlleremea.co.uk
|
$152,695 *
GBP £113,404
|
Addison, TX | Apr 04, 2026 | — | Active |
* Converted to USD at daily European Central Bank (ECB) exchange rates
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AeroGurus Data & Analysis
Independent data from FAA, NTSB, and market analysis
About This Cessna 421B
This 1971 Cessna 421B (N234DA) is a 8-seat multi engine piston with 3,560 hours on the airframe. There are currently 17 421B aircraft listed for sale with asking prices ranging from $129,500 to $399,999. This aircraft is priced below the market average at $150,000.
The 421B cruises at 230 kts (426 km/h) with a range of 1,385 nm (2,565 km) — suitable for regional and medium-distance travel.
Operating costs: Fuel burn is 34 GPH (129 L/h), which at current Jet-A prices (~$5.50/gal) means approximately $187/hr in fuel alone. Total variable cost including maintenance reserves is approximately $420/hr. Annual fixed costs (hangar, insurance, crew, annual inspection) average $42,000. With 3,560 hours on the airframe, this aircraft has exceeded TBO (1,600 hrs) — verify engine status and overhaul reserve.
NTSB records show 0 incidents for this airframe — a clean safety record. There are 1 airworthiness directive applicable to this aircraft type — review AD compliance carefully before purchase. Mechanics have filed 10 service difficulty reports for this type — common maintenance items to discuss during pre-buy.
Pre-Purchase Checklist
Cessna 421B — Model Specs
Model specificationStandard specs for this model. Actual aircraft may differ.
Estimated Cost of Ownership
AeroGurus estimateCESSNA 421B
AeroGurus estimates based on industry averages for the CESSNA 421B. Actual costs vary by location, usage, maintenance history, and configuration. Not a financial quote.
Ownership & Registration
FAA registration data pending for N234DA.
Location & Ownership
Title Status
No FAA title records
Available for US-registered aircraft only
Source: FAA Aircraft Registry, FAA Civil Aviation Registry (DocIndex). Title data may be delayed. Always verify with an aviation attorney before purchase.
Safety Record
NTSB safety data coming soon.
We'll check N234DA against the NTSB accident database.
Airworthiness Directives — Cessna 421B
ADs are mandatory safety instructions issued by the FAA. 1 recent AD found for this aircraft type.
The Cessna Aircraft Company Models 401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425, and 441 Airplanes
View full AD →Source: FAA Airworthiness Directives database. Showing most recent ADs for this aircraft type.
Service Difficulty Reports — Cessna 421B
SDRs are reports filed by mechanics about problems found during maintenance. 10 recent reports for this aircraft type.
LOSS OF 5 INCHES OF MP AT FL 240 AND INFLIGHT INVESTIGATION SHOWED A ROUGH RUNNING RH MAGNETO. DISCOVERY OF A DEFECTIVE SPARK PLUG LEAD (SEE OTHER SDR) ON A 25 HR TTSN CHAMPION SPARK PLUG HARNESS LED WITH 25 HRS TTSN SPARK CHAMPION RHB32E SPARK PLU...
CRUISE FLIGHT FL 240, 25 HRS SINCE NEW CHAMPION IGNITION HARNESS, BLUE LABEL TCM/CAT BENDIX S6LN-1205 MAGNETO, AND CHAMPION RHB32E SPARK PLUGS AT ENGINE OVERHAUL (25 HRS TTSMOH OF ENGINE). IN CRUISE FLIGHT LOST 5 INCHES OF MP PRESSURE ON NEWLY OVER...
A CRACK ON THE SKIN AT THE RIGHT WING REAR SPAR AND TRAILING EDGE. THE LOCATION IS AT THE MAIN FUEL TANK REAR SPAR ATTACH POINT. THE CRACK IS CAUSED BY VIBRATION OR LOOSE REAR MAIN FUEL TANK ATTACH BOLT. RECOMMENDED AT EACH ANNUAL INSPECTION, INSP...
PERFORMED REPAIR WORK ON THE AIRCRAFT FOR LOW CABIN DIFFERENTIAL/PRESSURIZATION. FOUND MANY LEAKS AND REPAIRED. DIFFERENTIAL WAS REPAIRED TO BOOK VALUES. CUSTOMER TOOK POSSESSION OF THE AIRCRAFT AND AFTER SEVERAL FLIGHT HOURS HEARD A POP AND LOST SOM...
(CAN) AIRCRAFT SUFFERED AN UNCOMMANDED RIGHT ENGINE SHUT DOWN APPROXIMATELY 10 MINUTES INTO THE FLIGHT, PILOT EXECUTED AND ENGINE OUT SHUT DOWN AND FEATHERED THE PROPELLER, THEN DIVERTED. ON OPENING THE RIGHT ENGINE COWLS THE FOLLOWING WAS FOUND: TH...
HAD ONE ROUGH MAG CHECK AND 2 GOOD MAG CHECKS PRIOR TO FLIGHT. REDUCED POWER IN CLIMB AND MAG CHECK REVEALED NO SPARK ON LT MAGNETO. RETURNED TO AIRPORT. REMOVED IGNITION HARNESS FROM MAG AND NOTICED LOTS OF METAL FLAKES UNDER THE COVER OF THE MAG...
FOUND PILOTS SEAT LT PIVOT ARM BROKEN. REPLACED PIVOT ARM IAW SERVICE MANUAL (REV 15) SECTION 3.
WHEN OIL FILTER WAS SECTIONED FOR CHECK FOR CONTAMINATION, LARGE CHIPS OF ALUMINUM WERE NOTED. SENT OIL FILTER TO AVIATION OIL ANALYSIS LABS AND CONTACTED ENGINE MFG FOR GUIDANCE. REMOVED AND INSPECTED OIL PUMP, NO DEFECTS FOUND. REMOVED VALVE TRA...
WHILE REPAIRING RUDDER DUE TO WIND DAMAGE, FOUND RUDDER TORQUE TUBE, PN 5133011-9 TO BE BADLY CORRODED. REPLACED WITH NEW.
RPM AND MANIFOLD PRESSURE STARTED FLUCTUATING FOR THE RT ENGINE. WHITE SMOKE FROM TURBO CHARGER VENTS WAS NOTED AS WELL AS OIL STREAKS NOTED. OIL PRESSURE DROPPED TO BOTTOM OF GREEN ARC ON THE OIL PRESSURE GAGE. EMERGENCY PROCEDURE CHECKLIST CALLE...
Source: FAA Service Difficulty Reporting System. Shows maintenance issues reported by mechanics for this aircraft type.
Price History
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