DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: 
APPROVED SECTIONPAGE 45
MAINTENANCE MANUAL STEMME S12
4.4 STRUCTURAL LIMITATIONS
The airframe composite structure of the STEMME S12 (including various STEMME P/N’s) is currently
life limited to 6000 hours of ight time.
Extension of service life above 6000 hours can be achieved only by alteration from replace-
ment (TBR) to TBO and introduction of an additional overhaul at 6000 hours and a subsequent
mandated overhaul interval (TBO) for continuing airworthiness. The TBO change will be notied
by a revision of this chapter.
The additional overhaul will include a comprehensive inspection of the airframe carried out in
accordance with approved data based on an agency approved TBO program.