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.
According to the CDC growth charts the 50th weight-for-age percentile for a 4-month-old baby boy is approximately 15 Ibs., and for infant girls about 13.5 Ibs. Concerns Four-month-old babies who display short stature, underweight, overweight or at risk for overweight may require further evaluation or have an underlying health problem.