As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO. 1 ENGINE WILL NOT START DURING PUSH BACK. ACCOMPLISHED QRH ITEMS AND STILL NO SUCCESS. DID NOT HAVE START VALVE OPEN LIGHT DURING ENGINE START PROCESS. GROUNDED - YES. FOUND #1 ENG. START VALE CONNECTOR WAS LOOSE. TIGHTENED CONNECTOR. OPS CK IS GOOD. REF B737-800 AMM 80-11-03.