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.
Understanding Birth Weight. Birth weight can also indicate whether a baby is born prematurely. Babies born with a weight of less than 2,500 grams (about five and one-half pounds) are considered to have low birth weight. Generally, infants with a birth weight less than 2,500 grams are premature.