Service difficulty report · B-Nut · Boeing 777222

Difficulty date
April 29, 2010
Submitted
April 30, 2010
Operation
Air carrier
Aircraft
N213UA
Make and model
Boeing 777222
Aircraft serial
30219
Aircraft time
34,992 hours, 7,743 cycles
Engine
Pwa PW4084
Part
B-Nut
Condition
Leaking
Location
Bleed Sys
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

LT PRSOV MESSAGE. FOUND LINE LEAKING AT THE PRSOV WHEN USING PNEUMATIC TESTER. REMOVED LINE AND FOUND THE "B " NUT SEVERELY GALLED AND ALSO THE UNION GOING INTO THE VALVE. MFG NEW LINE AND PRESSURE TESTED IT OK. PRSOV WORKED NORMALLY USING THE PNEUMATIC TESTER.