What was found
ONE OF THE TWO NOSE GEAR EXTEND COMPENSATORS INSTALLED ON THIS AIRCRAFT LOST ITS AIR CHARGE. THE NOSE GEAR WOULD NOT EXTEND PROPERLY DURING AN EMERGENCY GEAR EXTENSION RESULTING FROM A FAILURE DURING NORMAL EXTENSION. THE AIRCRAFT HAD JUST RECEIVED AN ANNUAL INSPECTION, BUT THE COMPENSATORS HAD NOT BEEN CHECKED. SUBMITTER STATED THE CURRENT MANUFACTURER'S MM PROCEDURES FOR EXTENSION/RETRACTION DID NOT SPECIFY THE NEED TO CHECK THEM, THOUGH IT WAS ON THEIR CHECKLIST, WHICH HAD NOT BEEN USED.