What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot was on final approach to Chino Airport (cno). The pilot established a 100 foot descent rate and noticed the engine RPM was slightly above 2900 rpm's. the pilot reduced the throttle slightly to bring the engine rpm's back to 2900 RPM and keep the descent rate. The pilot observed the manifold pressure to be approximately 10 inches hg and then heard a sound louder than normal from the engine. The pilot observed the engine rpms to be 3300 to 3500 RPM. To reduce the RPM and avoid reducing the manifold pressure the pilot raised the collective. The engine RPM remained high and descent rate increased. Pilot realzed he would not make it back to the airport and radioed Chino tower that he was going to land north of the airport. The aircraft made a hard landing and sustained substantial damage.
As the FAA filed it
THE PILOT WAS ON FINAL APPROACH TO CHINO AIRPORT (CNO). THE PILOT ESTABLISHED A 100 FOOT DESCENT RATE AND NOTICED THE ENGINE RPM WAS SLIGHTLY ABOVE 2900 RPM'S. THE PILOT REDUCED THE THROTTLE SLIGHTLY TO BRING THE ENGINE RPM'S BACK TO 2900 RPM AND KEEP THE DESCENT RATE. THE PILOT OBSERVED THE MANIFOLD PRESSURE TO BE APPROXIMATELY 10 INCHES HG AND THEN HEARD A SOUND LOUDER THAN NORMAL FROM THE ENGINE. THE PILOT OBSERVED THE ENGINE RPMS TO BE 3300 TO 3500 RPM. TO REDUCE THE RPM AND AVOID REDUCING THE MANIFOLD PRESSURE THE PILOT RAISED THE COLLECTIVE. THE ENGINE RPM REMAINED HIGH AND DESCENT RATE INCREASED. PILOT REALZED HE WOULD NOT MAKE IT BACK TO THE AIRPORT AND RADIOED CHINO TOWER THAT HE WAS GOING TO LAND NORTH OF THE AIRPORT. THE AIRCRAFT MADE A HARD LANDING AND SUSTAINED SUBSTANTIAL DAMAGE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N5697B · 2
Matched to the same aircraft by N-number and date.