As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A BI-LEVEL FLOW CONTROL VALVE REPLACEMENT WHILE PERFORMING A BLEED AIR LEAK TEST A LARGE LEAK WAS FOUND ON THE RH ENGINE LOWER Y-TUBE. THE LEAK WAS ON THE INSIDE FACING THE ENGINE ALONG A WELD. THE LEAK WAS LARGE ENOUGH IT COULD BE FELT AT ENGINE IDLE SPEED.