Rant: old mechanic told me I was chasing false pressure readings for 2 months
Had a 727 engine with a bleed pressure issue that was driving me nuts. Kept pulling the sensor and swapping it out, thinking it was bad. Then this retired guy from Pratt & Whitney walks by, watches me for a minute, and says the problem is probably the ground wire on the harness, not the sensor itself. I checked it with a multimeter and yeah, 15 ohms of resistance where there should be zero. Two months of chasing ghosts (and $400 in parts) because I didn't check the simple stuff first. How often do you guys see wiring cause false readings like that?