SDR UALA2012112806842

Service difficulty report · B-Nut · Boeing 757222

Difficulty date: November 27, 2012
Submitted: January 18, 2013
Operation: Air carrier
Aircraft: N548UA
Make and model: Boeing 757222
Aircraft serial: 25396
Aircraft time: 79,046 hours, 22,848 cycles
Engine: Pwa PW2037
System (JASC): 2910 · Hydraulic System, Main
Part: B-Nut
Condition: Loose
Location: Rudder
Stage of operation: IN
How discovered: O
Nature of condition: K
Precautionary procedure: O

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

What was found

ON WALK AROUND, NOTICED HYD FLUID LEAKING FROM AFT END OF RUDDER. DURING ACCOMPLISHMENT OF SVC TIP FOUND B-NUT LOOSE, AND DRIPPING HYD FLUID ON RT YAW DAMP SERVO. TIGHTENED B-NUT, RAN RUDDER SEVERAL TIMES, NO NEW LEAKS NOTED. REF SVC TIP 22-21-02. ALSO RAN RUDDER WITH NORMAL HYD SYSTEM, NO LEAKS NOTED.