What was found
INSTALLED OIL COOLER AT ZERO TSO TO REPLACE A LEAKING COOLER. DURING FIRST RUN-UP, TRANSMISSION OIL PRESSURE IMMEDIATELY EXCEEDED MAXIMUM ALLOWABLE LIMITS. BY PERFORMING A BORESCOPE INSPECTION, LOOSE AND BUILT UP CARBON WAS DISCOVERED IN THE COOLER. RELEASED CARBON ALSO CONTAMINATED THE TRANSMISSION CLOGGING UP THE OIL JETS AND DRIVING UP THE PRESSURE. FURTHER INVESTIGATION REVEALED ALL ENGINE AND TRANSMISSION FITTINGS AND LINES WERE CONTAMINATED WITH CARBON PARTICLES. TRANSMISSION WAS SUBSEQUENTLY TORN DOWN, CLEANED AND INSPECTED, AND ALL LINES. FILTERS AND OIL TANKS HAD TO BE CLEANED, FLUSHED, INSPECTED AND RE-INSTALLED.