SDR RYNA200906170007

Service difficulty report · B-Nut · Boeing 767332

Difficulty date: June 15, 2009
Submitted: June 17, 2009
Operation: Air carrier
Aircraft: N123DN
Make and model: Boeing 767332
Aircraft serial: 23437
Aircraft time: 65,718 hours, 30,289 cycles
System (JASC): 2910 · Hydraulic System, Main
Part: B-Nut
Part number: 312T10006
Condition: Loose
Location: Hydraulic Pump
Stage of operation: CR
How discovered: O
Nature of condition: K
Precautionary procedure: K

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

What was found

LEFT HYDRAULIC SYSTEM PRESSURE, RUDDER RATIO, LEFT HYDRAULIC QUANTITY, YAW DAMPER, AND SPOILER EICAS MESSAGES. TIGHTENED B NUT THAT BACKED OFF ON NR 1 ENGINE HYDRAULIC PUMP. REMOVED AND REPLACED PRESSURE, CASE DRAIN AND RETURN FILTERS.