SDR UIEA2025121501346

Service difficulty report · Actuator · Boeing 747481

Difficulty date: December 15, 2025
Submitted: December 18, 2025
Operation: Air carrier
Aircraft: N429MC
Make and model: Boeing 747481
Aircraft serial: 24833
Aircraft time: 122,091 hours, 18,821 cycles
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Actuator
Part number: 65B0150423
Part serial: SHL525
Condition: Failed
Location: Zone 700
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

GEAR TILT CAUTION AND STATUS MSG'S FOR LH BODY GEAR PRIMARY AND ALT PROX SWITCH TARGET FAIL. FOUND FAILED TILT ACTUATOR. REPLACING ACTUATOR, HYDRAULIC FUSE, AND LINE TO ACTUATOR. LEAK & OPS CHECKS GOOD. NO DEFECTS NOTED IAW AMM 32-13-24,32-31-00, AND 32-13-24.