Service difficulty report · B-Nut · Boeing 74787UF

Difficulty date
November 9, 2014
Submitted
November 17, 2014
Operation
Air carrier
Aircraft
N858GT
Make and model
Boeing 74787UF
Aircraft serial
37569
Aircraft time
12,139 hours, 2,224 cycles
Engine
Ge GENX2B67B
Part
B-Nut
Condition
Loose
Location
Engine Oil
Stage of operation
CR
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

OIL QUANTITY NR 2 ENGINE DECREASED TO ZERO OVER A 2 HOUR PERIOD, DIVERTED. PRESSURE AND TEMPERATURE STAYED NORMAL. FOUND NR 5 BEARING SCAVENGE TUBE B-NUT LOOSE. TORQUED B-NUT IAW AMM 79-21-09. PERFORMED GROUND RUN AND NO LEAKS NOTED.

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