What was found
REGULATOR FAULT NR 1 LIGHT ILLUMINATED. ABNORMAL PROCEDURES ACCOMPLISHED. REGULATOR FAULT REMAINED UNCORRECTED. HP MI IN-LINE, NO PRESSURE INDICATION. PLACED NR 1 ENGINE BLEED AIR SUPPLY SYS ON DMI 4944. MEL 36-11-01 S.P. 36-11-01. ACCOMPLISHED REG LOCKOUT. CORRECTIVE ACTION; DURING TROUBLESHOOTING, FOUND OPEN AT CONNECTOR 51HA TERMINAL B. REPAIRED SAME IAW 20-53-00. PERFORMED OPERATIONAL TEST IAW 36-11-00 BLOCK 501. NO DEFECTS NOTED. THIS CLEARS DMI #4944. PLACARD REMOVED. STATUS - CLOSED.