SDR 9510256622

Service difficulty report · Sequence Valve · Boeing 747251B

Difficulty date: July 1, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N622US
Make and model: Boeing 747251B
Aircraft serial: 21704
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Sequence Valve
Condition: Leaking
Location: Rt Mlg
Stage of operation: CL
Nature of condition: J
Precautionary procedure: A, J

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

What was found

DURING CLIMB AND GEAR RETRACTION, THE RED GEAR LIGHT REMAINED ILLUMINATED. AIRCRAFT DUMPED APPROXIMATELY 140,000 LBS OF FUEL AND RETURNED TO KIX. UPON INSPECTION, FOUND THE RIGHT WING GEAR SEQUENCE VALVE LEAKING. ALSO, FOUND 6 BROKEN CLAMPS. TIGHTENED LOOSE NUT AND REPLACED CLAMPS. LEAK AND OPERATIONAL CHECK NORMAL.