SDR UIEA2019081305021

Service difficulty report · Floorbeam · Boeing 747422

Difficulty date: August 28, 2019
Submitted: September 3, 2019
Operation: Air carrier
Aircraft: N480MC
Make and model: Boeing 747422
Aircraft serial: 28812
Aircraft time: 75,274 hours, 8,388 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Condition: Corroded
Location: Fuselage
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

CABIN - STA 940, BL 0 TO RBL 60 FLOORBEAM FOUND CORROSION. CORROSION REMOVED AS PER SRM 51-10-02. BLEND OUT DEPTH 0.040", ORG 0.128", WIDTH 1-2", LENGTH 7" OUT OF SRM 53-00-51 ALLOWABLE DAMAGE 1 FIG 101 LIMIT. CABIN - STA 940, BL 0 TO RBL 60 FLOORBEAM REPAIRED IAW SRM 53-20-51-2R-1 AND EO 4453B733.