As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. BHX-JFK FLIGHT DIVERTED TO LHR ACCOUNT LEFT ENGINE HIGH STAGE WARNING INDICATION. OVERWEIGHT LANDING UNEVENTFUL. REMOVED AND REPLACED LEFT HIGH STAGE PILOT VALVE IAW AMM 36-11-08 AND LEFT HIGH PRESSURE SHUTOFF VALVE IAW AMM 36-11-07(AALA20170106005). OPERATIONAL CHECK GOOD.