SDR AALA20040755

Service difficulty report · Valve · Boeing 757223

Difficulty date: July 1, 2004
Submitted: July 29, 2004
Operation: Air carrier
Aircraft: N634AA
Make and model: Boeing 757223
Aircraft serial: 24592
System (JASC): 2932 · Hydraulic Pressure Sensor
Part: Valve
Part number: 705073
Condition: Inoperative
Location: Hyd System
Stage of operation: CL
How discovered: V
Nature of condition: J
Precautionary procedure: A

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

What was found

SJU - INFLIGHT T790/01 TWO MINUTES AFTER TAKEOFF LOST LEFT HYDRAULIC SYSTEM QUANTITY. MANUALLY EXTENDED GEAR AND FLAPS AND TURNED LEFT HYDRAULIC PUMPS OFF WHEN PRESSURE LIGHT ILLUMINATED. LANDED SJU WITHOUT INCIDENT. FOUND BRAKE METERING VALVE DAMPED. REPLACED RIGHT BRAKE METERING VALVE ASSEMBLY AND CHECKED LEFT SYSTEM HYDRAULIC FILTERS. SYSTEM GROUND CHECKED NORMAL OPERATION.