As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOLLOWUP TO REPORTS OF #1 ENGINE STARTING ISSUES AROUND MAX MOTORING SPEED. GROUNDED - YES. PERFORMED TSR STEPS 1-4. STEP 2 REMOVED, INSPECTED AND REPLACED NO 1 ENG 5TH STAGE CHECK VALVE REF B737-800 AMM 36-11-02. STEP 3 START VALVE DID NOT OPEN FULLY. REMOVED AND REPLACED NO 1 ENG START VALVE REF AMM 80-11-03. ALL OTHER STEPS NFF. OPS CHECK AND LEAK CHECK GOOD. NO FURTHER ENG STARTING ISSUES AROUND MAX MOTORING.