SDR IPXA2017072819868

Service difficulty report · Wire · Boeing 74744AF

Difficulty date: July 28, 2017
Submitted: July 28, 2017
Operation: Air carrier
Aircraft: N575UP
Make and model: Boeing 74744AF
Aircraft serial: 35664
Aircraft time: 35,494 hours, 5,323 cycles
System (JASC): 3297 · Landing Gear System Wiring
Part: Wire
Condition: Damaged
Location: Proximity Switch
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

EICAS AFTER TAKEOFF FOR GEAR DISAGREE, DUMP FUEL, AND RETURNED TO DEPARTURE. REVIEWED CMC FAULT MESSAGE AND FOUND RT BODY GEAR UP PRI & ALT PROXIMITY SWITCHES FAILED. PERFORMED TROUBLESHOOTING & INSPECTION OF PRI & ALT SENSORS AND WIRES IAW WDM 32-61-25, FOUND J20, T381 ONE TERMINAL STUD BROKEN. REPAIR AND SPLICE AFFECTED WIRES & CONTINUITY CHECKED OK IAW EOB747-2000-32424-D. R & R PSEU ASSY.

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