As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENGINE START NR 2 ENGINE, N2 REACHED 23 PERCENT THEN FELL BACK TO 16 PERCENT. GROUND CREW NOTED SMOKE AND SPARKS COMING FROM NR 2 ENGINE. ACCOMPLISHED ABORTED START CHECK LIST, RETURNED TO GATE. ACFT GROUNDED. R & R NR 2 ENG STARTER IAW MM 8-11-01-000-801-F00 AND 8-11-400-801-F00. RAN NR 2 ENG, STARTER OPS AND LEAK CHECKS GOOD. CHECKED SURROUNDING AREA NO DEFECTS NOTED.