FAA regulators will enforce mandatory repairs on commercial aircraft to prevent ice accumulation from unexpectedly shutting down widely-used General Electric (GE) engines on Boeing and Airbus aircraft, a move from the agency that was revealed in Thursday’s Federal Register, covering some 700 GE engines after the company believed they had eliminated the hazard nearly four years ago.

Beginning around 2007, the FAA ordered airlines to change high-altitude flight procedures and install new software on over 1,000 wide-body jetliners globally, which included Boeing 747s, according news reports.

The icing issue wasn’t heard of before government and industry experts documented the occurrences of single- or dual- engine shutdowns affecting some 100 aircraft worldwide from the mid-1990s to 2008.

Amid a 2007 safety directive issued by the agency, those aircraft equip with GE’s CF6-80 have experienced approximately 14 instances of flameouts, or unanticipated malfunction, 10 of which, according the agency, occurred during flight while four took place on the ground.

A proposal to replace electronic engine-control systems will be formally proposed next Monday by the agency, with new hardware to thwart said shutdowns.