Anybody can write a service letter, and you could argue both ways as to whether
a service letter is a part of the current o/h manual.

An approved supplement is, by definition, part of the manual.

My opinion only, YFSDOMV.

Jim





-And what is the current overhaul manual? Do service letters constitute
-supplements, as well as the supplements themselves?

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com