U.S. Marine Corps AH-1Z Zulu
Congratulations to the United States Marine Corps helicopter flight crews for fifteen years (5475 days) of mishap / accident free operation of their AH-1Z Viper Helo with original design main rotor. 
First Flight: 10 December 2000
Reported Accidents: 0
Main Rotor Redesigns: One (1) initiated & worked on for approximately ten years. Zero completed, implemented or incorporated. 
OORAH!, MerryChristmas and Happy New Year.
Last edited by Otterotor; 10th Dec 2015 at 12:46.
Reason: typo