SDR HYIA20160711001

Service difficulty report · Cylinder · Bnorm BN2B20

Difficulty date: July 5, 2016
Submitted: July 11, 2016
Operation: Air carrier
Aircraft: N530BN
Make and model: Bnorm BN2B20
Aircraft serial: 2209
Aircraft time: 13,864 hours, 38,184 cycles
Engine: Lyc IO540K1B5
Engine time: 2 hours, 2 cycles
System (JASC): 8500 · Engine (Reciprocating)
Part: Cylinder
Condition: Failed
Location: Engine
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING INSPECTION OF RIGHT ENGINE AFTER FAILED ENGINE CHANGE FUNCTIONAL CHECK FLIGHT; MAINTENANCE NOTED LARGE AMOUNTS OF METAL IN OIL SAMPLES. FURTHER INVESTIGATION REVEALED DAMAGED SPARK PLUGS, PISTON, AND CYLINDER WALL AT THE NR 2 CYLINDER. DURING REMOVAL OF CYLINDER AT INSTRUCTION OF LYCOMING, UNIDENTIFIABLE OBJECT WAS FOUND IN SECTION OF INTAKE TUBE. NR 2 CYLINDER ASSEMBLY, INCLUDING PISTON, AND THE OIL SUMP WERE REPLACED WITH SERVICEABLE PARTS.