Aircraft technician reported insufficient repair information in the 767-400 Boeing Structural Repair Manual.

Narrative

In the recent weeks 2; 767 aircraft have been removed from svc due to wear noted on the flap support fittings upper aft wheel well area. It appears that the blade seal attached to the landing gear door has been rubbing (vibrating) on the casting of the flap support fitting causing material loss. While evaluating damage as per SRM (Structural Repair Manual) the gate technicians were unsure of the limits provided .06 or just under a 1/16th of an inch. damage is across the casting lug. Detail illustration mentions edge limits; but the illustration is not clear is edge the meeting point of the horizontal and vertical faces of the material or the horizontal face of the material. a better illustration needs to be included in the SRM. both ac were promptly removed from svc due to clean up and rework times would take too long on the gate and a different ac was swapped for the trip. On a separate observation of this specific srm; it states No typical repair to landing gear beam; FLAP SUPPORT FITTING; support link; upper and lower stabilizer support fitting AVAILABLE. Specific repairs will be provided based on service experience. this may be confusing as some amount of rework is allowed.I would like a clearer procedure inserted in the srm. this will make decisions quicker in the future on the serviceability of future damage noticed at this location.