SDR UIEA2026013000026

Service difficulty report · Trunnion · Boeing 747409F

Difficulty date: February 5, 2026
Submitted: February 9, 2026
Operation: Air carrier
Aircraft: N439GT
Make and model: Boeing 747409F
Aircraft serial: 30767
Aircraft time: 99,231 hours, 18,065 cycles
System (JASC): 5343 · Fuselage, Landing Gear Attach Fittings
Part: Trunnion
Condition: Corroded
Location: Zone 700
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

CORROSION ON LT NLG TRUNNION BEARING CAP INBD SIDE. BLENDED OUT CORROSION ON THE LT NLG TRUNNION BEARING CAP INBD SIDE FACE AREA, WITHIN LIMITS. TREATED AREA PROTECTIVE FINISH ON BLENDED AREA IAW SRM 53-10-90-2R-1, REPAIR 1, FIG 201, DETAIL II. NO FURTHER DEFECTS NOTED.