SDR CALA2018032100969

Service difficulty report · Floor Support · Boeing 757222

Difficulty date: March 20, 2018
Submitted: March 21, 2018
Operation: Air carrier
Aircraft: N568UA
Make and model: Boeing 757222
Aircraft serial: 26674
Aircraft time: 81,729 hours, 27,521 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Part number: 143N55222
Condition: Corroded
Location: Bs 720-740
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

MAIN CABIN FLOORBEAM AND ADJACENT FLOOR SUPPORT BETWEEN BS 720 & 740, RBL 60 HAS CORROSION ON THE UPPER SURFACE. BLENDED THE CORROSION ON THE FLOOR SUPPORT FOUND TO BE OUT OF LIMITS IAW SRM 53-30-15, FIG 101, DETAIL IV, ALLOWABLE DAMAGE I. REPLACED IAW SRM 51-40-02, AND DWG 143N5522.