SDR UALA2012091805273

Service difficulty report · O-Ring · Boeing 767322

Difficulty date: September 17, 2012
Submitted: October 12, 2012
Operation: Air carrier
Aircraft: N672UA
Make and model: Boeing 767322
Aircraft serial: 30027
Aircraft time: 46,317 hours, 11,978 cycles
Engine: Pwa PW4056
System (JASC): 2910 · Hydraulic System, Main
Part: O-Ring
Condition: Leaking
Location: Hydraulic Sys
Stage of operation: NR
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

HYDRAULIC RIGHT SYS QUANTITY READS .068 RF, CENTER READS 1.22. CHRONIC CH3893 HYD SYS XFR, TROUBLESHOT PER FIM29-11-0 0 FIG 125, LEFT ANTISKID SHUTTLE VALVE MODULES FAILED TEST BK2 OF FIM. REPLACED NR 5 & NR 6 VALVE ASSY NR 5 SHUTTLE VALVE LEAKS WHILE HYD XFR OR PUMPING BRAKES FROM PLUG SLEEVE ITM 157. SAFTEY BROKEN ON NR 5 & NR 6 PLUGS SLEEVES. REMOVED & REPLACED "O" RINGS AND BACKUP RINGS ON SHUTTLE VALVE ASSY NR 5 AND NR 6 PER MM. LEAK CHECK GOOD. ACP BITE TEST PER MM. OPS CHECK GOOD.