N311MS

This airframe, registered as N311MS, is a Boeing 737-800 (designation 737-8Q8) built in 2004 with manufacturer serial number 30670. The aircraft is owned by US MARSHALS SERVICE JUSTICE PRISONER & (government) based in Oklahoma City, OK, US, and is registered in the US. It entered service as a standard production 737-800 and was subsequently operated and modified in a high-density configuration for prisoner and transport missions by the Justice Prisoner and Alien Transportation System (JPATS). Registry records emphasize its government ownership and mission-specific interior, with condition and valuation notes typically reflecting government-maintained maintenance standards rather than commercial market comparables.

The airframe is fitted in a high-density 189-seat passenger configuration that has been operated and modified specifically for prisoner and transport missions by JPATS, reflecting restraint and security adaptations rather than typical commercial cabin amenities. Typical mission profiles include medium- to long-range federal prisoner movements and inter‑jurisdictional transfers conducted from its government base in Oklahoma City, OK; routings exploit the airframe’s 3,060 nm range and cruise speed around 450 kts to connect regional hub airports and federal facilities. Avionics and systems are consistent with Boeing 737-800 certification standards, and maintenance is carried out under government contracting arrangements with an emphasis on security-related modifications and continuity of state operational readiness.

The Boeing 737-800 (NG family) occupies a performance niche as a single-aisle, medium-range airliner well suited for dense seating and frequent short-to-medium sectors; this example’s high-density fit emphasizes capacity over passenger comfort. Competing models in similar roles include variants of the Airbus A320 family and other 737 Next Generation types. For government-operated, mission-modified airframes like N311MS, resale and commercial market demand are affected by interior configuration and security fittings, and maintenance considerations typically follow government maintenance cycles rather than standard commercial lease returns.