What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)During a training flight, the student was demonstrating emergency landing gear extension procedures. While using the hand pump to extend the landing gear a loud pop was heard. The subsequent landing gear retraction cycle appeared normal. Two touch and go landings were performed without any abnormal landing gear indications. Upon return home base for landing, the landing gear would not extend. The emergency extension procedures were completed, however the landing gear remained in the up and locked position. A successful gear up landing was performed by the instructor. The aircraft sustained only minor damage. Upon inspection, the hydraulic hose for the down side of the nose gear actautor had separated from its sleeve and nut assembly. The failed hose appeared to be the original hose installed at the factory in 1974.
As the FAA filed it
(-23)DURING A TRAINING FLIGHT, THE STUDENT WAS DEMONSTRATING EMERGENCY LANDING GEAR EXTENSION PROCEDURES. WHILE USING THE HAND PUMP TO EXTEND THE LANDING GEAR A LOUD POP WAS HEARD. THE SUBSEQUENT LANDING GEAR RETRACTION CYCLE APPEARED NORMAL. TWO TOUCH AND GO LANDINGS WERE PERFORMED WITHOUT ANY ABNORMAL LANDING GEAR INDICATIONS. UPON RETURN HOME BASE FOR LANDING, THE LANDING GEAR WOULD NOT EXTEND. THE EMERGENCY EXTENSION PROCEDURES WERE COMPLETED, HOWEVER THE LANDING GEAR REMAINED IN THE UP AND LOCKED POSITION. A SUCCESSFUL GEAR UP LANDING WAS PERFORMED BY THE INSTRUCTOR. THE AIRCRAFT SUSTAINED ONLY MINOR DAMAGE. UPON INSPECTION, THE HYDRAULIC HOSE FOR THE DOWN SIDE OF THE NOSE GEAR ACTAUTOR HAD SEPARATED FROM ITS SLEEVE AND NUT ASSEMBLY. THE FAILED HOSE APPEARED TO BE THE ORIGINAL HOSE INSTALLED AT THE FACTORY IN 1974.