As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LOST NR1 BLEED AIR DUE TO DUCT OVERTEMP. RAPID DESCENT TO FLIGHT LEVEL 190 CARRIED OUT AT WHICH TIME A.P.U. BLEED AIR WAS USED. MAINTENANCE INVESTIGATION REVEALED NR1 ENGINE TOLERANCE TAKE-UP DUCT BETWEEN IP AND H.P. BLEED VALVE LOOSE. TOLERANCE TAKE-UP DUCT TIGHTENED AND SYSTEM CHECKED SERVICEABLE.