What was found
UNSAFE NOSE GEAR INDICATION UPON EXTENSION. EXTENDED GEAR WITH ALTERNATE EXTENSION HANDLE. HEARD LOUD BANG ON RT SIDE ON TAKEOFF. NOTE: UPON CREW DEBRIEF. CAPT STATED THEY DID NOT FEEL THE NOSE GEAR EXTEND (AS THEY NORMALLY WOULD) WHEN SELECTED DOWN. RT PSEU SHOWED NO NOSE GEAR CURRENT OR PREVIOUS FAULT. JACKED AND RETRACTED NOSE GEAR, ON EXTENSION NOSE GEAR DID NOT EXTEND, WITH UNSAFE INDICATION ON PRIMARY AND SECONDARY. EXTENDED NOSE GEAR USING ALTERNATE MODE. FURTHER INSP FOUND THE NOSE GEAR UNLOCK CYLINDER MOUNT STRUCTURE BROKEN. BRACKET INSTALLED IAW EO 8-5340-7-5000. COMPLIED WITH SB DC10-53-155 R02 AND NR N00001. OPS CHECKED GOOD.