AC No: 120-91
17. MISSED APPROACHES, REJECTED LANDINGS, AND BALKED LANDINGS.
a. General.
(1) Parts 121 and 135 do not specifically require an obstacle clearance analysis for one-engine-inoperative missed approaches or rejected landings. While it is not necessary to perform such an analysis for each flight, dispatch, or landing weight limitation, it is appropriate to provide information to the flightcrews on the safest way to perform such a maneuver should it be required. The intent is to identify the best option or options for a safe lateral ground track and flightpath to follow in the event that a missed approach, balked landing, rejected landing, or go-around is necessary. To accomplish this, the operator may develop the methods and criteria for the analysis of one-engine-inoperative procedures which best reflect that operator’s operational procedures.
(2) Generally, published missed approach procedures provide adequate terrain clearance. However, further analysis may be required in the following circumstances:
(a) Published missed approach has a climb gradient requirement;
(b) Departure procedure for the runway has a published minimum climb gradient;
(c) A special one-engine-inoperative takeoff procedure is required; or
(d) There are runways that are used for landing but not for takeoff.
NOTE: Operators should incorporate procedures for converting required climb gradients to required climb rates in pilot and dispatcher airplane performance sections of their approved training programs.
Gents. This tells me that OEI climb gradients are considered.
Also one can refer to FCOM 3.05.35 Approach Climb Gradient (%) to determine any odd %, other than the standard 2.5%.