SDR CA081128003

Service difficulty report · Gearbox · Skrsky S76

Difficulty date: November 27, 2008
Submitted: December 18, 2008
Operation: General aviation
Make and model: Skrsky S76
System (JASC): 6320 · Main Rotor Gearbox
Part: Gearbox
Condition: Failed
Location: Main Rotor
Stage of operation: IN
How discovered: O
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) MGB CHIP LIGHT INDICATION MGB PN:76351-09600-044,SN:A231-00107 REC`D AT HELI-ONE FOR REPAIR. TSN:8638:39 TSO:2516:54 FOLLOWING DISASSEMBLY AND INSPECTION OF MGB, RT OUTPUT ALIGNMENT BRG WAS IDENTIFIED AS THE CAUSE FOR METAL GENERATION WITH HEAVY SPALLING EVIDENT AT ROLLER PATHWAY OF OUTER RACE. FLUSH MGB AND REPLACE DISCREPANT BEARING. COMPANY SQID NR 08-8606.