SDR HYIA201608010011

Service difficulty report · Lifter · Cessna 402C

Difficulty date: July 29, 2016
Submitted: August 1, 2016
Operation: Air carrier
Aircraft: N991AA
Make and model: Cessna 402C
Aircraft serial: 402C0317
Aircraft time: 33,539 hours, 36,629 cycles
Engine: Cont TSIO520VB
Engine time: 7,419 hours
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Lifter
Part number: 658077
Condition: Damaged
Location: Rt Engine
Part time: 2,384 hours
Component: Engine · Cont · TSIO520VB
Component part number: TSIO520VB
Stage of operation: TX
How discovered: O
Nature of condition: R
Precautionary procedure: O

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

What was found

PILOT REPORTED DURING RUN-UP, RT ENGINE RPM OSCILLATES, 100 RPM. MAINTENANCE INSPECTED AND FOUND THE NR 3 CYLINDER EXHAUST LIFTER PITTED, THE NR 3 INTAKE LIFTER COLLAPSED AND THE NR 5 CYLINDER INTAKE LIFTER COLLAPSED. MAINTENANCE R & R THE LIFTERS IAW O/H MANUAL, CH 72-20-18.

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