As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT PRESS SPLIT IN CLIMB AND CRUISE 18L 42 R. GROUNDED - YES. ACCOMPLISHED NR 1 ENG BLEED AIR SYSTEM HEALTH CHECK REF T/C NG-36WC-00001. REMOVED & REPLACED NR 1 ENG PRECOOLER CTRL VALVE & NR 1 ENG BAR REF MM 36-12-02 & 36-11-03. LEAK & OPS CHECKED GOOD REF MM 36-11-00-710-801.