Hundreds of employees at Big Apple airports are in constant fear for their lives due to disastrously unsafe working conditions, according to a bombshell complaint. Fed-up Alliance Ground International workers rallied outside John F. Kennedy Airport Friday to share horror stories about their time at the runway and tarmac service company they claim has little regard for its staff. “Every single day I come to work, wondering if I’m going to make it home safe at the end of my shift. A lot of the equipment we use is old, broken down, and honestly unsafe,” said John Mosquera, who has worked as an AGI ramp agent with Frontier Airlines at LGA for nearly two years. AGI workers rallied at JFK to expose unsafe working conditions within the company. Kevin C. Downs for NY Post Mosquera, of the Bronx, told the crowd he passed out on the job during last summer’s record heat wave after he was forced to load bags into the unairconditioned belly of a plane.…