This is a usual scenario especially where the aircraft owner feels that the aircraft is safer even without compliance. In fact, if a service bulletin doesnât have an airworthiness directive, the FAA doesnât deem its recommendations to be mandatory or necessary.
Photo Credit OtmarW/iStock/Getty Images. If the weight-for-length calculation on your baby's growth chart drops below the fifth percentile, he is considered underweight. This means that more than 95 percent of babies his age weigh more than he does.
Kids ages 2 to 19 fall into one of four categories: 1  underweight: BMI below the 5th percentile. 2  normal weight: BMI at the 5th and less than the 85th percentile. 3  overweight: BMI at the 85th and below 95th percentiles. 4  obese: BMI at or above 95th percentile.