Operational History
Eight LB-6s and all operational LB-7s were delivered to the 20th and 96th Bomb Squadrons of the 2nd Bomb Group at Langley Field, Virginia, and the 11th Bomb Squadron of the 7th Bomb Group at Rockwell Field, California, between January and September 1929. The nine remaining LB-6s were sent to the 23rd and 72nd Bomb Squadrons, attached to 5th Composite Group at Luke Field, Hawaii, between July and September 1929. In May 1930 three LB-6s were re-engined to become LB-7s and transferred to the 25th Bomb Squadron of the 6th Composite Group based at France Field in the Panama Canal Zone, where they were all written off in 1931.
Beginning in March 1931 the surviving bombers in the Continental United States were taken out of front-line service, redesignated the ZLB-6 and ZLB-7, and sent to the 40th School Squadron at Kelly Field, Texas, where all were wrecked or surveyed by April 1935. The Hawaiian LB-6s served until 1934, when they too were surveyed in place.
Read more about this topic: Keystone LB-6
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