SEP 2011 R66 Maintenance Manual Chapter 4 Airworthiness Limitations Page 4.1
4-10 Airworthiness Limitations
The Airworthiness Limitations Section is FAA approved and specifies inspections and other
maintenance required under 14 CFR §§ 43.16 and 91.403, unless an alternative program has
been FAA approved.
A. Fatigue Life-Limited Parts
Part Number Description Maximum Service Life
C023-21, -34, & -35 Tailcone Assembly . . . . . . . . . . . . . . 2000 Hours
C044-1 Horizontal Stabilizer . . . . . . . . . . . . . . 2000 Hours
C154-1 Main Rotor Hub . . . . . . . . . . . . . . . . . 2000 Hours
C158-1 Main Rotor Spindle . . . . . . . . . . . . . . 2000 Hours
C251-3 Main Rotor Shaft . . . . . . . . . . . . . . . . 2000 Hours
C545-1 Gear Set, Tail Gearbox . . . . . . . . . . . . 2000 Hours
C647-12 Bearing Set, Swashplate . . . . . . . . . . 2000 Hours
D079-1 Tail Rotor Guard . . . . . . . . . . . . . . . . 2000 Hours
D196-1 Tail Rotor Drive Shaft . . . . . . . . . . . . 2000 Hours
F016-2 Main Rotor Blade . . . . . . . . . . . . . . . 2000 Hours or 12 years*
F020-1 Upper Frame . . . . . . . . . . . . . . . . . . 2000 Hours
F029-1 Tail Rotor Blade . . . . . . . . . . . . . . . . 2000 Hours or 12 years*
F143-1 Pinion, Main Gearbox . . . . . . . . . . . . . 2000 Hours
F146-1 Pinion, Main Gearbox . . . . . . . . . . . . . 2000 Hours
F195-1 Yoke, Tail Rotor Drive Shaft . . . . . . . . 2000 Hours
F235-13 Strut, Upper Frame . . . . . . . . . . . . . . 2000 Hours
F252-1 Strut, Upper Frame . . . . . . . . . . . . . . 2000 Hours
F263-1 Housing, Main Gearbox . . . . . . . . . . . 2000 Hours
F270-1 Cartridge, Main Gearbox . . . . . . . . . . 2000 Hours
G062-2 Tail Rotor Hub . . . . . . . . . . . . . . . . . 2000 Hours
G201-1 Frame, Servo Support . . . . . . . . . . . . 2000 Hours
* Whichever limit occurs first.
FAA Approved: This page constitutes the Airworthiness Limitations Section in its entirety,
is considered segregated from the rest of the document, and sets forth the FAA approved
mandatory replacement times for the fatigue life-limited parts listed above.
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