N633AT

The airframe bearing tail number N633AT is a 1985-built Cessna Citation S/II (S550) with serial number S550-0066. It is recorded as owned by AIR AMBULANCE BY AIR TREK INC, a corporation based in Wilmington, DE, US, and is registered in the US civil registry. The airframe’s history is characterized by its role in specialized transport operations, with the current ownership indicating dedicated air‑ambulance employment rather than standard corporate shuttle use. No public valuation or notable registry actions beyond the recorded ownership are published for this specific serial.

The aircraft is fitted in a model-typical cabin offering a typical 7–8-place executive/air‑ambulance layout, enabling flexible reconfiguration between patient litters and passenger seating depending on mission requirements. Operated by AIR AMBULANCE BY AIR TREK INC from its Wilmington, Delaware location, the airframe’s endurance and high cruise speed support medium‑to‑long single-leg patient transfers across a broad regional footprint. Routine missions for this configuration typically prioritize rapid point‑to‑point transfers, on‑board medical access, and interior systems that accommodate medical equipment and attendant seating; specific avionics fit and maintenance records for this serial are not published. Maintenance considerations for this airframe follow the S/II family’s twin‑jet patterns, emphasizing JT15D series engine support and aging‑airframe inspections appropriate to a 1985 build.

The Cessna Citation S/II (S550) occupies a mid‑sized light business jet niche suitable for high‑speed regional missions where single‑stop ranges near 1,430 nm and cruise speeds around 386 kts are valued. Competing models in this performance bracket typically include other light twin‑engine business jets of the 1980s and early 1990s; demand among niche buyers often stems from corporate, charter, and medevac operators seeking reliable short‑field performance and economical twin‑jet operation. Resale and maintenance considerations hinge on JT15D engine support, airframe fatigue inspections given the 1985 build year, and the degree of mission‑specific interior modifications common to air‑ambulance conversions.