Incident Overview
Approximately 8 hours into his duty day and after flying for about 6 hours, a first officer experienced a 20-second episode of simple vasovagal syncope (fainting). The episode occurred as he was walking from the right seat toward the lavatory. He was revived with an ammonia inhalant.
Medical Background
Interviews conducted by Aviation Medical Examiners revealed that the first officer had been ill with influenza for three weeks prior to the incident, though he believed he had recovered. During that three-week period, he was also intentionally dieting and experienced a ten-pound weight loss.
Medical Assessment
The FAA Aeromedical Standards Division Manager diagnosed the episode as simple vasovagal syncope and stated that it is not likely to occur again. Following the incident, the first officer's first-class medical certificate was reissued with the authorization of the Federal Air Surgeon.
Outcome
The first officer's medical certificate was reinstated, allowing him to resume his duties. No further details regarding the flight or aircraft were provided.