What was found
DURING FLIGHT, LEFT AIR VALVE LIGHT ILLUMINATED. CREW PERFORMED ALL APPROPRIATE CHECKS, STILL INOP. AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED LEFT ENGINE AIR BLEED SHUT OFF VALVE. ALL IAW GE MM, OPS CHECK GOOD ON THE GROUND.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING FLIGHT, LEFT AIR VALVE LIGHT ILLUMINATED. CREW PERFORMED ALL APPROPRIATE CHECKS, STILL INOP. AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED LEFT ENGINE AIR BLEED SHUT OFF VALVE. ALL IAW GE MM, OPS CHECK GOOD ON THE GROUND.