I was flying a Huey for the Mexican Gov. down in the state of Sinaloa when I got the dreaded chip light . (Shares with the 42 & 90) I pulled the plug in the field and it didn't look too bad, so I cleaned it off an flew back to base (light came on right at landing). Mex. mechanics climbed up, peeked in thru the oil filler, and there was a toothless grin, just like yours, to greet them. Just was overhauled by this bloody bugger in San Diego. I pulled it off and opened her up and dam if I could find the broken half of the tooth. And it was big enough to carry a part number so no way it came out the drain and no smaller pieces in there either. Flew back and showed it to the "Sleazy" who overhauled it. His answer "sneaky Mexicans pulled it apart in the middle of the night and swapped shafts" Only problem with that was the sealant had the original paint from overhaul that was never broken before I opened it. Guess 'Sleazy" just had no respect for the mexicans!