SDR UIEA2014062600250

Service difficulty report · Metering Valve · Boeing 7474J6

Difficulty date: June 26, 2014
Submitted: June 28, 2014
Operation: Air carrier
Aircraft: N747BC
Make and model: Boeing 7474J6
Aircraft serial: 25879
Aircraft time: 36,237 hours, 9,933 cycles
System (JASC): 3240 · Landing Gear Brake System
Part: Metering Valve
Part number: RHLH705072
Condition: Faulty
Location: Brake System
Stage of operation: TO
How discovered: O
Nature of condition: E
Precautionary procedure: O

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

What was found

DURING TAKEOFF ROLL LIGHT TO MODERATE VIBRATION FELT & CONTINUED AFTER GEAR RETRACTION WITH AN AIRFRAME BUFFET THROUGH APPROXIMATELY 3000 FEET. REFERENCE ITEMS M4, M5, M6, M7, M10, M12, M15 & LOG PAGE 556316 THROUGH LOG PAGE 556319. RT & LT BRAKE METERING VLVS & MULTIPLE WHEEL POSITION REPLACED.

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