N400GP

This article covers a specific airframe, N400GP, an Israel Aircraft Industries-built IAI 1124 Westwind I completed in 1986 with manufacturer's serial number 423. The airframe is owned by Icmc Idaho LLC, an LLC based in Salinas, CA, US, and is registered in the US. Notable registry activity includes its presence on the U.S. civil register under the current LLC owner. The airframe's market valuation is recorded at $395,000, reflecting its age, configuration, and legacy avionics condition.

The subject aircraft is outfitted in an executive cabin configured for 7–10 passenger seating with an operator-dependent forward galley and an enclosed lavatory, providing a standard corporate layout for mid-size business missions. The installed avionics are the legacy Collins/Honeywell-era integrated flight deck, with operator-dependent upgrades possible, meaning retrofit potential exists but has not been uniformly applied to this airframe. Typical operations for this airframe, given its performance and range, would include medium- to long-range business travel and charter legs from its base in Salinas, CA, US to regional or transcontinental points, leveraging a high cruise speed and long-range capability. Maintenance considerations reflect the age of the airframe and powerplants—two TFE731-series turbofans—alongside potential avionics modernization costs that influence operational availability and mission flexibility.

The IAI 1124 Westwind I occupies a niche for compact, long-range twinjets offering higher cruise speeds and altitudes compared with light twins while remaining cost-competitive against larger midsize jets. Competing models typically include earlier light to midsize business jets from American and European manufacturers. Buyer and charter demand for a 1986 Westwind I like N400GP is influenced by its solid range and cruise performance but tempered by airframe age, legacy avionics, and maintenance history; these factors drive resale valuation and the likelihood of avionics or interior refurbishment when preparing the aircraft for continued business or charter use.