As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABOUT 5 SECONDS AFTER GEAR HANDLE TO DOWN POSITION HEARD LOUD BANG IN VICINITY OF NOSE GEAR. ABOUT 2 SECONDS LATER GOT NORMAL GEAR DOWN INDICATION. *S/D* FOUND STRUT PRESS-EXTENSION LOW. NO FLUID LEAKS. REPLACED NOSE GEAR PRESSURE SWITCH SYSTEM CHECKED NORMALLY. A/C RETURNED TO SERVICE.