As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FAILED A BLEED AIR CROSSOVER OPERATIONAL TEST. BLEED AIR PRESSURE OUT OF LIMITS AT 30% N1 AND LOWER. GROUNDED - YES. FOUND THE HIGH STAGE REGULATOR CONTROL PRESSURE SENSE LINE LOOSE AND DISCONNECTED. TIGHTENED THE SENSE LINE IAW AMM 36-11-07. ACCOMPLISHED A NR 1 ENGINE BLEED AIR CROSSOVER OPERATIONAL TEST IAW AMM 36-11-00, TEST PASSED.