ISLIP - Many Long Islanders bound for spring vacation destinations are wondering just how well the pilots on their next flight have been vetted after a JetBlue captain was tackled following an in-flight outburst today. Experts say that before a pilot gets certified, he or she must undergo a strict medical exam. Every six months after that, pilots must be re-examined to have their certificates renewed. However, pilots do not undergo formal psychiatric screenings, according to experts. The Federal Aviation Administration (FAA) has its own medical guidelines and each airline follows up with its own screening, which may include psychological questions. Two years ago, the FAA changed a policy to let pilots fly while taking anti-depressants.Passengers: Captain flips out on Vegas-bound flight