N421MD V

This aircraft — FAA registration facts

N421MD is a 1978 Cessna 421C (serial 421C0516), registered to Boss Contract Services LLC (LLC) in Terry, MT. Its FAA registration is recorded as v and expires July 2033; the airworthiness certificate dates from May 1999 (27 years ago). It carries 2 Cont Motor GTSIO-520 SER engines rated at 300 hp each (600 hp total), the engine on 18% of registered Cessna 421Cs. Its Mode-S transponder broadcasts the ICAO 24-bit address A5006D. It is one of 501 Cessna 421C aircraft on the FAA registry. Boss Contract Services LLC holds 2 aircraft on the registry.

Registered owner

Boss Contract Services LLC

Owner type

LLC

Based in

Terry, MT

Serial number

421C0516

Year built

1978 · 48 yrs old

Airworthiness class

Standard – Normal

FAA status

V

Mode-S / ICAO24

A5006D · 51200155 octal

Certificate issued

Jul 28, 2026

Airworthiness date

May 23, 1999

Last FAA activity

Jul 28, 2026

Registration expires

Jul 31, 2033

FAA region

S

Source: FAA aircraft registry (public record). Community reviews and photos below.

Engine on this aircraft

Engine

Cont Motor GTSIO-520 SER

Engine type

Reciprocating (Piston)

Rated power

300 hp × 2 (600 hp total)

Power per seat

75 hp

FAA engine code

17046

64 of the 352 registered Cessna 421C carry this engine (18%), across 15 engine variants on the type.

Source: FAA engine reference (ENGINE.txt), matched on this registration's engine code.

Runway requirement (estimate)

A Cessna 421C needs roughly 4,500 ft of runway for takeoff at sea level (takeoff distance ~3,900 ft plus a 15% safety margin). Check it against a destination airport →

Planning estimate for takeoff only — excludes landing distance, wind, density altitude, and contamination. Verify against the aircraft's POH/AFM.

Community facts about N421MD

Reported by pilots, owners and enthusiasts — community-reported and admin-checked before they publish. Always verify anything important against the aircraft's records.