As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: BLEED 1 AND 2 FAULT AFTER TAKEOFF. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO PHL LANDING SAFELY. FOUND INCORRECT PROCEDURE ON MODIFICATION 3619Y005 (REMOVAL OF SENSE LINE BETWEEN PRESSURE REGULATING VALVE AND GIMBAL DUCT, ON BOTH ENGINES) ITEM 2A5 WITCH INDUCED BLEED 1 AND 2 FAULT ON BOTH ENGINES. CORRECTED PROCEDURE 2A5 AS REQUIRED.