As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE THRUST REVERSER HAS INTERMITTENT HISTORY OF LIGHT ON AND NOT DEPLOYING AND SETTING NO EAU FAULTS. GROUNDED - YES. PERFORMED B737-800 FIM 78-32 TASK 814. NO FAULTS FOUND. REMOVED AND REPLACED THE AUTOTHROTTLE SWITCHPACK IAW B737-800 AMM 76-11-07. GROUND VERIFICATION TEST CHECKS GOOD. NO FAULTS ON EAU.