All of the newer edition UH-1H flight manuals I know of contain a lot of OCR errors. Even the one I bought on amazon (http://www.amazon.de/Iroquois-Pilots-Flight-Operating-Instructions/dp/1935700650/ref=sr_1_2?ie=UTF8&qid=1363595705&sr=8-2, change 18 ) is so full of OCR errors, it's ridiculous.
A few examples:
p. 2-7: IGMTION -> IGNITION
p. 2-9: Main Dnveshaft -> Driveshaft
p. 2-23: 14. Position fights -> lights
p. 2-23: 16. Oil cook -> cooler
everywhere: m -> in
If anyone has the latest manual (change 19 I think) without OCR errors, please let me know.