SDR SWAA2020041420362

Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date: March 9, 2020
Submitted: April 14, 2020
Operation: Air carrier
Aircraft: N427WN
Make and model: Boeing 7377H4
Aircraft serial: 29831
Aircraft time: 61,697 hours, 36,249 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

***CORROSION*** ON FLOOR BEAM UPPER SURFACE AT B.S. 986.5; L.B.L. 45 - R.B.L. 45; W.L. 208.1. / REMOVED CORROSION ON FLOOR BEAM UPPER SURFACE AT BS986.5; LBL45-RBL45 WL208.1 IN 5.0'L X 1.0'W AREA. CORROSION FOUND TO BE OUT OF LIMITS AT NUTPLATE HOLE RBL45 DUE TO NO SRM ALLOWABLE DAMAGE ON PREVIOUS T-CHORD REPAIR IAW SRM 51-10-02-0G-0 PAR 9C. REMOVED AND REPLACED T-CHORD FROM RBL28-RBL50 IAW SRM 53-70-51-2R-4 REPAIR 4.

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