What was found
RETURNED TO RAMP DUE PRIOR TO TAKE OFF - LOUD POP ASSOCIATED WITH SMOKE IN CABIN - SHUTDOWN NR 1 ENG. REMOVED NR 1 ENGINE IAW HALM144-717 INSTALLED NR 1 ENGINE IAW HALM143-717 GRD OPER & LEAK CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURNED TO RAMP DUE PRIOR TO TAKE OFF - LOUD POP ASSOCIATED WITH SMOKE IN CABIN - SHUTDOWN NR 1 ENG. REMOVED NR 1 ENGINE IAW HALM144-717 INSTALLED NR 1 ENGINE IAW HALM143-717 GRD OPER & LEAK CHECK GOOD.