What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Aircraft was flying enroute from marana airport (avq) to Casa Grande (cgz) giving a student a fam. Ride. The engine blew up short of the runway at Casa Grande. The instructor set the aircraft down short of the runway, sustaining no damage or injuries. Further investigation revealed that the #1 connecting rod bearing had spun and blocked oil pressure to the bearing. The rod let go of the crank and caused the #2 connecting rod to let go and come thru the top of the case. The engine had 1500 hours on it since a major overhaul. Suspect that the bearing rod had worn enough to allow it to spin.
As the FAA filed it
(-23) AIRCRAFT WAS FLYING ENROUTE FROM MARANA AIRPORT (AVQ) TO CASA GRANDE (CGZ) GIVING A STUDENT A FAM. RIDE. THE ENGINE BLEW UP SHORT OF THE RUNWAY AT CASA GRANDE. THE INSTRUCTOR SET THE AIRCRAFT DOWN SHORT OF THE RUNWAY, SUSTAINING NO DAMAGE OR INJURIES. FURTHER INVESTIGATION REVEALED THAT THE #1 CONNECTING ROD BEARING HAD SPUN AND BLOCKED OIL PRESSURE TO THE BEARING. THE ROD LET GO OF THE CRANK AND CAUSED THE #2 CONNECTING ROD TO LET GO AND COME THRU THE TOP OF THE CASE. THE ENGINE HAD 1500 HOURS ON IT SINCE A MAJOR OVERHAUL. SUSPECT THAT THE BEARING ROD HAD WORN ENOUGH TO ALLOW IT TO SPIN.
Other reports on N9903G · 2
Matched to the same aircraft by N-number and date.