TLD offers industry-leading Air Start and Ground Power Units to meet 21st century aircraft. Available in a variety of sizes to accommodate all commercial aircraft, TLD's Model 600 ASU Series now offer even more operational and performance data feedback to operators and maintenance personnel as well a rugged galvanized chassis with total-access to all maintenance-critical areas. The Model 4000 Series Ground Power Units have been one of TLD's fastest growing product lines in recent years. TLD innovative Generator Control Module assures engine and generator output immediately supply the aircraft with clean, consistent power regardless of changes in demand. TLD Ground Power Units electrical characteristics meet or exceed the industry's highest standards.