Service difficulty report · O-Ring · Boeing 767322

Difficulty date
August 4, 2025
Submitted
August 6, 2025
Operation
Air carrier
Aircraft
N672UA
Make and model
Boeing 767322
Aircraft serial
30027
Aircraft time
88,358 hours, 17,738 cycles
Part
O-Ring
Part number
NAS161212A
Condition
Worn
Location
Zone 100
Stage of operation
IN
How discovered
V
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

HYDRAULIC CENTER SYSTEM, SUSPECT LEAK IN AREA OF AIR DRIVEN PUMP FILTER MODULE, LT WHEEL WELL HYDRAULIC PRESSURIZATION WITH ADP CUT OUT IAW AMM 29-11-00-862-216, LH WHEEL WELL ADP FILTER MODULE INLET PRESSURE UNION FOUND LEAKING HYD FLUID. O-RING ON THE INLET PRESSURE UNION FOUND WORN. ADP FILTER MODULE INLET PRESSURE UNION O-RING REPLACED IAW AMM 29-11-19-404-029. LEAK CHECK OUT, NO LEAKS FOUND AT THE FILTER MODULE.