SDR UIEA2019083105370

Service difficulty report · Floorbeam · Boeing 747422

Difficulty date: August 28, 2019
Submitted: September 1, 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: Bs 1220
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

M/D - STA 1220, RBL 99 - 115, FLOOR BEAM FOUND CORRODED. M/D - STA 1220, RBL 99 - 115, FLOOR BEAM CORROSION REMOVED AND RE-PROTECTED AS PER SRM 51-10-02 AND SRM 51-20-01. BLEND OUT DEPTH 0.011", ORG 0.090", WIDTH 1.2", LENGTH 8" WITHIN SRM 53-00-51 ALLOWABLE DAMAGE 1 FIG 101 LIMIT.