As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURN TO BLOCKS. FLIGHT NR 7757 MAF TO LBB. DURING TAXI OUT TO THE RUNWAY, THE RT ENG OIL PRESSURE GAGE BEGAN TO FLUCTUATE THEN DROPPED INTO THE RED. ACFT WAS SAFELY TAXIED BACK TO BLOCKS. MX FOUND THE CONNECTIONS AT THE OIL PRESS TRANSMITTER DIRTY. CLEANED CONNECTIONS AT THE RT ENGINE OIL PRESSURE TRANSMITTER.