What was found
WHILE FLYING AT FL400 A LOUD (THUNK) WAS HEARD COMING FROM THE BACK. THE GEAR UNSAFE LIGHT ILLUMINATED WITH HYD PRESS STEADY. ADJUSTED NOSE GEAR UPLOCK HOOK AND UP LOCK SWITCH IAW MM 32-30-05 GEAR SWING OPERATIONAL CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE FLYING AT FL400 A LOUD (THUNK) WAS HEARD COMING FROM THE BACK. THE GEAR UNSAFE LIGHT ILLUMINATED WITH HYD PRESS STEADY. ADJUSTED NOSE GEAR UPLOCK HOOK AND UP LOCK SWITCH IAW MM 32-30-05 GEAR SWING OPERATIONAL CHECK GOOD.