What was found
PILOT REPORTED HEARING A LOUD BANG WHEN LAND GEAR WAS RETRACTED. A/C LANDED WITHOUT INCIDENT. INVEST REVEALED MFG PN 1281001-3, RT MAIN GEAR ACTR BODY CRACKED THROUGH (PHOTOS). COMPLIED WITH SEB AT 5741.4 HRS. A/C TT. AD2001-06-06 HAS BEEN COMPLIED WITH. FOUND CRACK STARTING WHERE LANDING GEAR CASTING ATTACHES ONTO SPOT FACE OF BODY. COULD NOT SEE UNLESS ACTUATOR WAS REMOVED. FOUND MFG PN 9882004-1 PISTON AND 9882002-2 SECTOR GEAR SHOWS SIGNS OF GEAR GALLING. SECTOR GEAR WAS REPLACED 4011.0 HOURS PRIOR. ACTUATOR BODY MAY HAVE FAILED DUE TO FATIGUE. INSTALLED NEW ACTUATOR MFG PN 9882015-4 AND SECTOR GEAR AS REQUIRED. TEST RAN LANDING GEAR AND PERFORMED CHECKS AND TESTS, FOUND OK.