Oct 23 (Reuters) - U.S. supplier Spirit AeroSystems ( SPR )

will implement a 21-day furlough for approximately 700

employees working on the 767 and 777 programs, effective Oct.

28, the company said on Wednesday.

The financial pressures may require the company to implement

layoffs and additional furloughs, Spirit added.

The company also released results on Wednesday, reporting

third-quarter revenue of $1.47 billion and a loss of $4.07 per

share.