SDR ERAA085164

Service difficulty report · Gearbox · Bolkms BO105S

Difficulty date: February 18, 2003
Submitted: March 17, 2003
Operation: Air carrier
Aircraft: N152EH
Make and model: Bolkms BO105S
Aircraft serial: S701
Aircraft time: 13,451 hours
System (JASC): 6520 · Tail Rotor Gearbox
Part: Gearbox
Part number: 4619002003
Part serial: 853
Condition: Making Metal
Location: Tail Rotor
Part time: 12,647 hours
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

GEARBOX MAKING METAL. GEAR SET SCRAPPED DUE TO MICRO PITTING, OUTPUT BEARINGS SCRAPPED DUE TO MICRO PITTING. REPAIRED IAW REM 304, INSTALLED NEW PINION, BEVEL GEAR, OUTPUT BRGS, ASSEMBLED IAW REM 304, ADJUSTED BACKLASH & DISTANCE AS REQUIRED. COMPLIED WITH ASB BO-105-30-111, SB BO-105-30-109