SDR CALA2015022000111

Service difficulty report · Sequence Valve · Boeing 757224

Difficulty date: February 14, 2015
Submitted: February 20, 2015
Operation: Air carrier
Aircraft: N33103
Make and model: Boeing 757224
Aircraft serial: 27293
Aircraft time: 84,525 hours, 18,283 cycles
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Sequence Valve
Part number: 26702889
Part serial: 0237
Condition: Unserviceable
Location: Nlg
Stage of operation: CL
How discovered: O
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

AFTER TAKEOFF HAD GEAR DOOR LIGHT & EICAS GEAR DOORS. GEAR DOOR FAILED TO CLOSE, AIR RETURNED , OVERWEIGHT LANDING APPROX 225,000 LBS, ACTUAL 222,160 LBS IAW NR 4919148, 4919151, 4919152 & 4919155. R & R OF NLG SEQ VLV, R & R OF NLG RELEASE INTERLOCK ACT, R & R OF NLG INT SEQ ACT CONNECTOR & OVERWEIGHT LANDING INSP. ALL OPERATIONS & LEAK CHECKED GOOD.