SDR UIEA2019083005348

Service difficulty report · Floor Support · Boeing 747422

Difficulty date: August 28, 2019
Submitted: August 31, 2019
Operation: Air carrier
Aircraft: N480MC
Make and model: Boeing 747422
Aircraft serial: 28812
Aircraft time: 75,274 hours, 8,388 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Condition: Corroded
Location: Bs 920-940
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: O

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

What was found

M/D STA 920-940, LBL 40, FLOOR SUPPORT FOUND CORRODED. CABIN STA 920-940, LBL 40, FLOOR SUPPORT CORROSION REMOVE AND RE-PROTECTED AS PER SRM 51-10-12 AND SRM 51-20-01. BLEND OUT DEPTH 0.007", ORG 0.100", WIDTH 1", LENGTH 7" WITHIN SRM 53-00-51 ALLOWABLE DAMAGE 1 FIG 101 LIMIT.</P>)