SDR CA010522016

Service difficulty report · Plate · Skrsky S61N

Difficulty date: May 1, 2001
Submitted: May 25, 2001
Operation: General aviation
Make and model: Skrsky S61N
Aircraft time: 32,875 hours
Engine: Ge CT581401
System (JASC): 6220 · Main Rotor Head
Part: Plate
Condition: Cracked
Location: Main Rotor Head
Part time: 14,100 hours
Component: Main Rotor Head · Skrsky · S61102000304
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

(CAN) ON POST FLIGHT INSPECTION A CRACK WAS FOUND EXTENDING UPWARD FROM BIFILAR ATTACH BOLT HOLE ON MAIN ROTOR HUB UPPER PLATE. MAIN ROTOR HEAD REMOVED FROM SERVICE. ON DISASSEMBLY, SHIM CHECK WAS CARRIED AS PER SB 61B10-46, AND FOUND TO BE WITHIN ACCEPTABLE TOLERANCE. NO NOTABLE CORROSION WAS FOUND IN THE PLATE BOLT. SIKORSKY HAS BEEN NOTIFIED.