May 27 (Reuters) - Striking workers at RTX's

Pratt & Whitney approved the company's second contract offer on

Tuesday, ending a three-week-long strike, according to a

spokesperson for the International Association of Machinists and

Aerospace Workers.

Union representatives have previously said the roughly 3,000

striking workers' top priority is getting Pratt to commit to

keep work for Lockheed Martin's ( LMT ) F-35 fighters in the

state.

The strike is the first in more than 20 years at the

enginemaker's Connecticut sites, where it produces engines for

the F-35 and about 70% of the company's geared turbofan engine,

which is used in European planemaker Airbus'

strong-selling A320 neo family.