What was found
LEFT ENGINE BLEED PRESSURE INDICATES 7PSI IN CLIMB & CRUISE, OPENED NR 1 ENGINE & TR FOUND NO OBVIOUS VISIAL DESCREPENCIES. OPENED & CLOSED NR 1 ENGINE. PERFORMED HIGH POWER RUN REF FIM 36-10 TASK 804. ZERO DUCT PRESSURE ON ENG NR 1 AT ALL POWER LEVELS. PERFORMED ENG BLEED AIR SYS HEALTH CHK IAW AMM 36-11-00-700-801 UP TO STEP G.5(D).2, PRSOV FAILED. R & R PRSOV REF AMM 36-11-04. CONTINUED ENG HEALTH CHK. R & R BLEED AIR REGULATOR REF AMM 36-11-03. NO FIX. CONTINUED HEALTH CHK AMM 36-11-00-700-801 UP TO BUT NOT INCLUDING STEP G.6(E)9. R & R THE BLEED AIR REGULATOR REF AMM:36-11-03, ATTEMPTED HEALTH CHK FROM PREVIOUS STEP, COULD NOT GET ANY SUPPLY AIR THROUGH BAR. BENCHED CHKD BAR, & FOUND OPEN NR 1 ENG, ACCOMPLISHED ENG BLEED AIR CROSSOVER OPS TEST PER MM 36-11-00-710-801. ALL DUCT PRESSURES WITHIN MM LIMITS.