Jim Macklin wrote:
Standard climb gradients are based on 150'/ NM (if I
remember correctly) and if a departure is greater than that,
it will be noted on the chart. FAR 135 and 121 require that
the most adverse performance be considered when operating,
gross weight must be reduced to meet the performance
requirement. Often you will see airliners with half the
seats empty because the airplane can't meet the take-off
requirements.

I did not say it very well the first time.



Departures are standard if they do not exceed 200 feet per mile.

Missed approach surfaces are 40:1, which is 152 feet per mile. That is
probably the 150 per mile you're thinking of. The current FAA thinking
is that a missed approach requires 200 feet per mile, and the AIM so
states. (AIM 5-4-20 b)

One-engine climb gradient requirements apply on the commercial
operators. (121.189 for air carriers). But, the air carrier, under
121.189, is not required to look at the missed approach procedure's
entire area of protected airspace. If the carrier finds that will not
penalize them they are free to simply accept the missed approach as a
missed-approach OEI flight path.

As you know, the 121.189 issues are far more pronounced on departure
than they are on the typical missed approach.