Lockheed P38E Lightning "" Aleutian""

First major production version for the USAAF was the P-38E. It differed from the D-version in having a 37mm cannon with the 15round magazine replaced by a 20mm with 150 rounds. It also had a revised nose section with double the ammunition capacity of earlier versions, improved instrumentation and a revised hydraulic and electrical systems, and a SCR-274N radio.
Operating in the Aleutians, the 54FS was the first unit to see combat in the Lightning, and the first kills scored by the P-38 were made by pilots in this unit.