Lynn Mighell, 73 who was district manager in Washington for the Carrier Corporation for 20 Years before retiring in 1967, died of euremic poisoning Thursday in the Prince William Hospital in Manassas.

During his years as district manager, he helped direct air-conditioning projects at the Pentagon, the White House , Dulles International Airport, and at several leading area hotels and shopping centers.

Mr. Mighell, a native of Holstein, Iowa, came to Washington after World War II. He lived in the District and McLean before retiring to Manassas.

He joined the Carrier Corporation in 1935 and worked for them in Philadelphia before coming here.He was a graduate of the University of Iowa. During World War II he helped designs and was chief engineer at two snthetic rubber plants in Texas.

Mr. Mighell was a member of the Exchange Club. He also had belonged to the Building Owners and Management Association and the American Society of Heating, Refrigeration and Air-conditioning Engineers.

He was a member of St. John's Episcopal Church in McLean.

Survivors include his wife, Marjorie Holmes of Manassas; two sons, Mark of Allentown, Pa., and Mallory of District Heights; two daugthers, Marjorie Croner of Mendocino, calif., and Melanie Mighell of Manassas; two sisters, Yula Parker of Lampasas, Tex., and Margaret Rosendahl of Portland, Ore., and four grandchildren.