NION LLC· ICAO24 a70451· last seen Jun 2026

N551NC is a Cessna Citation II/SP, a twin-engine jet operated by NION LLC. SkyMeter has tracked 70 flights totalling 82 hours of airtime via ADS-B. The most frequent segment is KIXD to KLWC. Service window in our records spans 373 days. Of those flights, 6 (8.6%) carry at least one detected incident: a go-around, unstable approach, stall warning, or runway excursion. The Cessna Citation II/SP has a 52 ft wingspan, a maximum takeoff weight of 14,800 lb.

About the Cessna Citation II/SP

The Cessna Citation II is a light business jet that became one of the most successful corporate aircraft of the 1980s, building on the original Citation's reputation for economy and simplicity while adding meaningful performance improvements. Introduced in 1977 as the Model 550, it stretched the fuselage to seat up to eight passengers, added more powerful Pratt & Whitney JT15D-4 engines, and increased range to roughly 1,500 nautical miles, making it viable for true coast-to-coast missions in the United States. Cessna produced more than 650 Citation IIs and the improved Citation II/SP variant before transitioning to the Bravo in the mid-1990s, and the type remains popular in the owner-flown and charter markets for its straightforward systems, modest operating costs, and forgiving handling characteristics.

The aircraft cruises at around 400 knots and reaches a service ceiling of 43,000 feet, respectable figures for a light jet that prioritized reliability and dispatch availability over raw speed. Its straight wing and docile stall behavior made it a favorite among pilots stepping up from piston twins, while its relatively short runway performance allowed access to smaller airports that larger jets couldn't serve. SkyMeter has tracked flights across airframes and operators, with among the most active observed operators.

FLIGHTS
70
all time
FLOWN HOURS
82
tracked time
📍
AIRPORTS VISITED
18
unique
📡
CALLSIGNS
1
28 routes
📅
SERVICE PERIOD
06/03/2025 → 06/11/2026
first → last
INCIDENT RATE
8.6%
6 flagged

Top routes

By flight count

10
3
2
2
2
1
1
1
1
1
1

Flight numbers

Most-flown by this airframe

1

Aircraft specifications

Cessna Citation II/SP

Engines
Twin Jet
Vref (approach)
100 kt
Vmo
270 kt
MTOW
14,800 lb
Wingspan
52 ft
Length
48 ft
Wake category
Light

Recent flights

Newest 39 operations of N551NC

39
05/16/2026
42m
△ Low approach-stability score
02/24/2026
48m
△ Low approach-stability score
10/08/2025
10m
△ Low approach-stability score
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