As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG SMOKE (ELECTRICAL) SMELL OCCURRED IN COCKPIT AND FIRST CLASS WHEN POWER PUSHED UP TO TAXI AFTER ENGINE START. T/S PER M/M 05-50-01-101 INSPECTED FWD AND AFT E/E COMPT I RLY R2-51. INSP BEHIND COCKPIT OVERHEAD PANEL AND RLYS AND C/BS BEHIND FWD FLT ATTENDANT SEAT. CKD APU INLET NO CONTAMINATION CKD C/BS IN OVERHEAD IN F/C CKD OPN OF PACKS USING ENG AND APU OK, RAN ENGS ALL OPN OK. NO SMOKE OR ELECTRICAL SMELL.