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Multi-Engine Piston

1977 CESSNA 421C

🕒 Listed 2 months ago
$297,000
fyiEstimate $404,500–$415,000 ⓘ How this estimate is built

Starts from the median asking price of 64 comparable Cessna 421C listings ($440,000), then adjusts for:

  • Year -2 vs comparable listings -3.0%
  • Airframe time -1,402 hr vs comps +2.8%
  • Engine time +284 hr vs comps -4.0%
  • Modern GPS navigator (75% of comps) +3.5%
  • No Autopilot (69% of comps have one) -2.1%
  • ADS-B (61% of comps) +1.0%
  • Market supply: 68 for sale of 497 FAA-registered -5.0%

Shown as a range. An estimate from asking-price comparables and FAA supply data — not an appraisal.

1977
4,805 hrs
N878DM ✈ Flight Tracking
Sep 02, 2026 (47 days ago)
421C-0413
CONTINENTAL GTSIO520L
2
MCCAULEY
KLGB
★ 4.8 (17 Google reviews)
Fly North 421 LLC
Per the FAA aircraft registry (public record)
📍 Helena, MT

Overview

Make / ModelCessna 421C
TypeMulti-Engine Piston
Airframe time4,805 hrs
Engine time1,424 SFRM
Prop blades3
Avionics / GPSGarmin GNS 530, GNS 430
Avionics / TransponderGarmin GTX 330ES
Avionics / GPS / navGNS 530W, GNS 430W
ADS-BYes
Garmin GPS FIKI / known ice ADS-B

Description

Turnkey 421C with a new paint job and professionally flown. Aircraft will be sold with a fresh annual. Documents: - W&B N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960711&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYL8pdlm35385eSqoMI3D0Oj7lW6cND5t6392fbZne9rv5yWPRfZOm1a18YlUBcYFiM%3d - Airframe 4 N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960710&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYLcmz9AKRhis4a6TNmeRIwHvp3kISpoJJxqn1SpEu%2b7blMi5WtWGqB2cymDRlI7jbA%3d - Airframe 3 N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960674&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYLJbo4TTgYfkWm02Dl3fXFqPEY0xuM1A9jPGCQyKo1UBOvAZn%2b3ecOV17QRA1lsrTk%3d - Airframe 2 N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960598&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYKkc3zgmACTS%2fZK%2bs9q2LzexwwM9k9Lic7yL6rlfSYSE%2bR1pCBWm0PdXAhlt%2b2JCug%3d - Airframe 1 N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960492&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYJhT7NMpFY%2fceiauSUa93M7NcA6z9hZooFF0YneL4G6%2fsp%2fIkXdq86CcSiP5nmxXCI%3d - RH Prop N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960441&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYKH4YzpXip9t1ulBJH%2bgq%2fdWKa9HUF37OZiEaxD7ssEXH4XrGvhUvelTgEDZkPs8Gc%3d - RH Engine N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960424&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYI0FViDE%2b4U8bKpGZXDbSGalEAhozWwR3aG7BW3l2NGEzX2%2b2lIobg5rSUDsz9n8BA%3d - LH Prop N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960388&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYIoj%2fpFS0zL6o7LHnV2q%2bN%2b3BufZgCSeLPdkCqTbIAiTibF79qNgIlF2v9ZkiF%2f%2b%2fs%3d - LH Engine N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960332&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYJueWqMnptdTWsu2M0F2zyXLarK3%2fv4UPvm7w8sd1qxgSvC43pv79%2bxeuDTMcbJGvE%3d - Airframe 5 N878DM.pdf: https://media.sandhills.com/doc.axd?id=10006960247&p=&ext=.pdf&dl=False&wt=False&checksum=2GeMQvxmpYIzF5Ja3zi5kmDZUasp%2fIfXB2%2ffKeiiPoPFs0%2fzuDoA9hs9f4e559xdKnHionGWBO4%3d

Avionics

Garmin GNS 530W Garmin GNS 430W Garmin GTX 345R Transponder Garmin GTX 330ES Transponder Cessna 800B Navomatic Auto-pilot Terrain Weather Shading Fuel Flow JPI EDM 760

Recommended avionics upgrades

Garmin GTN 750Xi

A GNS 530 is a drop-in upgrade to the GTN 750Xi — bigger touchscreen, WAAS/LPV, and modern nav/comm/MFD.

See prices & suppliers ›
Garmin GFC 500 autopilot

No autopilot is listed — a GFC 500 (or S-TEC 3100 / Trio Pro Pilot where the GFC isn't STC'd) adds a modern digital autopilot with envelope protection, subject to model approval.

See prices & suppliers ›

Suggestions are based on the panel described in this listing; verify STC approval for this make/model before any installation.

Service Difficulty Reports (SDRs)

Checking FAA service difficulty reports…

Airworthiness Directives (ADs)

Checking airworthiness directives…

How this aircraft compares

Where this Cessna 421C lands versus other Cessna 421C listings on fyiAero.

Price

17th pct
$130k$825kThis aircraft · $297k

$297k · 17th percentile of 64 listings

Airframe time

22nd pct
2,56010,050This aircraft · 4,805

4,805 hours total (TTAF) · 22nd percentile of 67 listings

Engine time (Engine 1)

92nd pct
14,120This aircraft · 1,424

1,424 hours since factory reman · 92nd percentile of 65 listings

Engine time (Engine 2)

51st pct
18,328This aircraft · 625

625 hours since major overhaul · 51st percentile of 65 listings

Percentile = share of comparable listings at or below this value. Lower airframe/engine hours are generally fresher; price reflects the asking price only.

Documents

General

Year1977
ManufacturerCESSNA
Model421C
Serial Number421C-0413
Registration #N878DM
ConditionUsed
FlightRulesIFR
Based atKLGB

Airframe

Total Time4,805
Max Takeoff Weight7,450 lb
Basic Empty Weight5,350 lb
Fuel Capacity Volume234 gal
Auxiliary Fuel TankYes
Complete LogsYes

Engine 1

Engine 1 Make/ModelCONTINENTAL GTSIO520L
Engine 1 Serial Number245908-R
Engine 1 Horsepower375 HP
Engine 1 Time1,424 SFRM
Engine 1 TBO1600
Engine 1 TurbochargedYes

Engine 2

Engine 2 Make/ModelCONTINENTAL GTSIO520L
Engine 2 Serial Number292188-R
Engine 2 Horsepower375 HP
Engine 2 Time625 SMOH
Engine 2 TurbochargedYes

Props

Prop 1 ManufacturerMCCAULEY
Prop 1 Model3FF32C501
Prop 1 Time197 SOH
Prop 2 ManufacturerMCCAULEY
Prop 2 Model3FF32C501
Prop 2 Time197 SOH
Number of Blades3
Props SyncYes

Avionics

ADS-B EquippedYes
WAASYes
LPVYes
Yaw DamperYes
Avionics/RadiosGarmin GNS 530W Garmin GNS 430W Garmin GTX 345R Transponder Garmin GTX 330ES Transponder Cessna 800B Navomatic Auto-pilot Terrain Weather Shading Fuel Flow JPI EDM 760

Additional Equipment

PressurizedYes
Oxygen SystemYes
Flight Into Known Icing (FIKI)Yes
A/CYes

Modifications/Conversions

Dual Aft Body StrakesYes

Interior

Number of Seats7
LavatoryYes

Exterior

Year Painted2023

Service Logs

MiscellaneousW&B N878DM.pdf Airframe 4 N878DM.pdf Airframe 3 N878DM.pdf Airframe 2 N878DM.pdf Airframe 1 N878DM.pdf RH Prop N878DM.pdf RH Engine N878DM.pdf LH Prop N878DM.pdf LH Engine N878DM.pdf Airframe 5 N878DM.pdf

Operating costs & specifications — Cessna 421

Typical model-level figures for the Cessna 421 (not this specific airframe).

$59,467annual budget · 72 hrs/yr
$475variable cost / hour
$2.14cost per nm
47.0gph fuel burn
$274,332avg pre-owned asking fyiEstimate  $404,500–$415,000

Performance & dimensions

Range826 nm
Cruise speed222 kts · 255 mph
Takeoff / landing2012.0 / 1045.0

About this plane

Twin engine piston aircraft with retractable landing gear. The 421 seats up to 6 passengers plus 1 pilot.

Range from base

Still-air range ring — type an aircraft to change it. Compare aircraft on the Range tool ›

Last flight

Actual flight path from FlightAware for N878DM. More flight tracking ›