Service difficulty report · Gear · Boeing 737*

Difficulty date
September 13, 2014
Submitted
March 12, 2015
Operation
General aviation
Make and model
Boeing 737*
Aircraft time
7,514 hours
Engine
Cfmint CFM567B27E
Part
Gear
Part number
LINE6
Condition
Failed
Location
Agb
Part time
6,663 hours
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 A SCHEDULED INSPECTION OF THE RIGHT ENGINE MAGNETIC CHIP DETECTORS, MAGNETIC PARTICLES WERE FOUND ON THE AGB & TGB DETECTOR. THE PARTICLES WERE COLLECTED & SENT TO THE LAB FOR SEM & EDX ANALYSIS. THIS ANALYSIS INDICATED THE MATERIAL TO BE 9310 STEEL. FOLLOWING AMM RECOMMENDATIONS, REPEAT INSPECTIONS WERE INITIATED & NO FURTHER PARTICLES WERE FOUND. DISCLOSED A POSSIBLE MANUFACTURING PROBLEM WITH THE LINE 6 AGB GEAR SHAFT & ON OCT 10 AN INQUIRY WAS PLACED ASKING IF THIS PARTICULAR AGB COULD CONTAIN ONE OF THE SUSPECT GEARS. RESPONDED ON SERVICE REQUEST 7-1-4732602812 THAT INDEED ONE OF THE SUSPECT LOT GEARS WAS INSTALLED IN THIS AGB. FOLLOWED UP WITH SUBSEQUENT AGB REPLACEMENT IAW AMM 72-63-00 401 & 601 ON OCT 19TH.