WASHINGTON, March 15 (Reuters) - Boeing ( BA ) said Friday it

told airlines operating 787 Dreamliners to check flight deck

switches after a sudden mid-air dive by a LATAM Airlines

787 plane left more than 50 people injured.

The Air Current, an aviation industry publication, reported

Wednesday the movement of a flight deck seat is a key focus of

the probe of Monday's flight. Boeing ( BA ) said Friday it took the

precautionary measure of reminding operators of a 2017 service

bulletin detailing instructions for inspecting and maintaining

flight deck seat switches. "We are recommending operators

perform an inspection at the next maintenance opportunity,"

Boeing ( BA ) said Friday.