What was found
TROUBLESHOT INOPERATIVE THRUST REVERSER DEPLOYMENT. FOUND LT, RT REVERSERS MECHANICALLY STIFF AND DIFFICULT TO OPERATE. THRUST REVERSER LINKS AND PIVOTS FOUND DRY, INITIAL 400 HR LUBRICATION NOT DUE FOR 55 HRS. LUBED REVERSERS IAW MM. 12-20-00, VERIFIED OPERATIONS OK. FOUND LT REVERSER NOT DEPLOYING UNTIL AFTER RT DEPLOYED. REPLACED LT CONTROL VALVE, OPERATIONAL CHECKS NORMAL. SUGGEST ALL THRUST REVERSER LUBES BE COMPLIED WITH AT 200 HR INITIAL INSPECTION. SUGGEST MFG INVESTIGATE CNTRL VALVE FOR POSSIBLE QUALITY CONTROL OR SYSTEM CONTAMINATION ISSUES. (K)