What do you get when you take the fuselage and powerplants of a Lear 35, incorporate the modern wing of the Lear 60, and add delta fins under the tail? If you guessed a Lear 31, you're right. The first Lear 31 jet flew in May of 1987 with development in August of 1988. The Lear 31 for sale quickly became a "must have" for many corporations. Modifications from previous models give the Learjet 31 for sale increased performance which is rarely equaled by other jets. Delta fins were added at the bottom of the empennage to not only improve performance and directional stability, but also eliminated the need for a stick pusher stall avoidance devise. After building 38 straight Learjet 31s, the Learjet 31A was announced as a replacement. When comparing a Lear 31A for sale with a Lear 31 for sale, most will quickly notice the changes on the flight deck. These changes include a Bendix King Electronic Flight Information System 50 with Universal 1M, 1B and 1C flight management system, a dual KFC 3100 two-axis autopilot and flight director with yaw damper, and dual Bendix King -40A com units, VN-411B Series III navigation receivers. If looking at a Lear 31A for sale, keep in mind that in the year 2000, the Lear 31A was revised again and came standard with thrust reversers and the engine control was replaced with an N1 DEEC. The air conditioning system was also upgraded to a two zone system. Also note that there are a few after market modifications on some of the Lear 31 for sale. The Raisbeck Engineering Aft Fuselage Locker offers additional storage mounted at the rear fuselage that can accommodate an extra 300 lbs of baggage with no performance penalties on the aircraft. You may also find a Lear 31 for sale with a ZR LITE performance mod (also from Raisbeck Engineering), that reduces drag, increasing speed and range. If you have found a Lear 31 for sale that you are interested in, make sure you are working with a broker who specializes in Learjets for sale. They will also connect you with a specialized Learjet mechanic to perform a pre purchase inspection, and make sure you get the right Lear for you