SDR 2004UALA00112

Service difficulty report · Line · Boeing 737322

Difficulty date: February 8, 2004
Submitted: February 17, 2004
Operation: Air carrier
Aircraft: N320UA
Make and model: Boeing 737322
Aircraft serial: 23952
Aircraft time: 47,473 hours, 25,931 cycles
Engine: Ge CFM56*
System (JASC): 2910 · Hydraulic System, Main
Part: Line
Condition: Failed
Location: Hydraulic System
Stage of operation: LD
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

LANDED UNDER AMBER ALERT DUE TO LOSS OF A SYSTEM HYDRAULICS. RIGID HYDRAULIC TUBE P/N 65C26809-1100 FAILED, ALLOWING THE A SYSTEM HYDRAULIC FLUID TO BLEED OUT. SUBSEQUENT INSPECTION FOUND THAT THE LINE HAD SHEARED ADJACENT TO WHERE IT WAS SECURED TO STRUCTURE WITH A CLAMP. THE HYDRAULIC LINE RUNS BETWEEN THE WING SPAR AND THE A SYSTEM EDP. THE HYDRAULIC LINE WAS REPLACED, NEW MOUNTING BRACKETS AND CLAMPS WERE INSTALLED, THE HYDRAULIC SYSTEM WAS SERVICED.