A/T - 200C/2004R Updated Servo Cover Retaining Ring
SIL 85-23SUBJECT: 200C/200-4R
A minor redesign of the cases has eliminated the access notch for the servo snap ring. With these cases a new retaining ring is used. If the old style ring is used on a new case, problems will arise when trying to remove it.
The changes were made to provide better retention of the servo cover.