As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 CYLINDER INTAKE ROCKER ARM CRACKED/SPLIT INTO 2 PIECES. CRACK/ SPLIT RUNS CROSS-WAYS NEAR ROCKER BOSS ON VALVE STEM SIDE OF ROCKER ARM. AGGRESSIVE MACHINING OF ROCKER ARM AND OR ROCKER ARM INCORRECTLY CONTACTING KEEPER SPRING ASSEMBLY. (K)