As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L ENG BLEED OFF CAS AFTER ENG START BLEED PSI PULSING UP AND DO WN 15 PSI DEBRIEF CREW. LEFT ENG BLEED PULSING AT ENG START WITH BLEED OFF INDICATION. EVEN WHEN ADDING POWER STILL PULSING. EVENTUALLY BLEED OFF INDICATION EXTINGUISHED BUT ENGINE BLEED STILL FLUCTUATING. FOUND NO EICAS MESS , RUN # 1 ENGINE AND PNEUMATIC SYSTEM PER AMM 36-11-00/501 PERFORMED FIM TASK 36-10 FAULT TREE 805 , NO FLUCTUATION NOTED ALL TEST PASSED OK TO CONTINUE.