As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLEED FAN AIR MODULATING VALVE RT ENGINE BLEED FAN AIR MODULATING VALVE FAILED OPEN OR CLOSED, OR RT AIR SUPPLY & CABIN PRESSURE CONTROLLER FAILURE. FOUND CONTROL PRESSURE SENSE LINE ELBOW NUT LOOSE & O-RING DAMAGED. REPLACED O-RING & TIGHTENED ELBOW NUT, RAN ENGINE, NO HELP. REPLACED RT FAN AIR MODULATING VALVE IAW MM 36-11-1 6. PERFORMED TEST ON MAT & RAN ENGINE & PERFORMED TASK 36-10 -00-700-804. OPERATIONS CHECKED NORMAL.