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SDR ASAA1058667

Open the Markdown

Service difficulty report · Gearbox · Boeing 737890

FAA SDR system

Difficulty date
December 18, 2010
Submitted
December 22, 2010
Operation
Air carrier
Aircraft
N597AS
Make and model
Boeing 737890
Aircraft serial
35689
Aircraft time
10,057 hours, 3,292 cycles
Engine
Cfmint CFM567B27
Engine time
10,057 hours, 3,292 cycles
System (JASC)
7200 · Engine (Turbine/Turboprop)
Part
Gearbox
Condition
Making Metal
Location
Nr 1
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

WHILE ACCOMPLISHING T/C 78472040 AGB/TGB CHIP DETECTORS INSPECTION FOUND ALUMINUM DEBRIS IN NR 1 ENGINE AGB/TGB CHIP DETECTOR. NR 1 ENGINE AGB TGB CHIPS DETERMINED TO BE SILVER FLAKING NO MAGNETIC MATERIAL NOTED. CHIPS ROUTED FOR LAB ANALYSIS. ENGINE MAY CONTINUE IN SERVICE WITH A REDUCED MCD INSPECTION INTERVAL AT 50-75 HOURS RETURN TO NORMAL INSPECTION INTERVAL WHEN THE MCD IS FOUND TO BE CLEAN REF MM 79-00-00-200-804-F00. AGB/TGB CHIP DETECTOR INSPECTED AND FOUND CLEAN, NO METAL. PLT CLEARED. RETURN TO NORMAL INSPECTION INTERVAL.