The hardest job on the Chinook to me was changing the fuel bladder and aquiring the knack of changing the aft transmission filter. Tracking blades at full throttle/or 85%? was also exciting. Did you ever try to get the gold dust out of a broken windshield? Stability Augmentation System ports, fexpacks on driveshafts, dogbones, swashplate, actuators, Jesus nut, multiplier to get blades on an off, I remember some of the chores after 33 years. I loved flying in the Chinook, highest we ever got as I recall was around 12,000 ft, we had to clear artillery somewhere around the An khe Pass on the way to Pleiku. We were sent to help support the forth division, around Thanksgiving 1967. Man as I sit here and recall my time in Nam, and remember the great guys I served with, especially my friends that did not make it back, I'm not ashamed to admit to you I get moist eyed. God Bless America, my home sweet home..