Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
October 28, 2023
Submitted
December 11, 2023
Operation
Air carrier
Aircraft
N8309C
Make and model
Boeing 7378H4
Aircraft serial
36985
Aircraft time
38,023 hours, 17,361 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Corroded
Location
Zn 200 Fus Top
Stage of operation
IN
How discovered
9
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

AFT WET AREA - CORROSION AT FLOOR BEAM BS 986.5 RBL 43 WL 208 (MARKED)<[01] REMOVED NUT PLATE AND FOUND CORROSION AT FLOOR BEAM AT BS 986; RBL 43; WL 208. REMOVED CORROSION WITH NEXT MEASUREMENTS L:1.20' W: 1' D: .060' AND FOUND FLOOR BEAM OUT LIMITS PER SRM 53-70-51-1A-1. USED TOOL ID: ATS2678 DUE: 02/29/24.;[02] VERIFIED STEP 2 COMPLETE.;[03] UPDATED MEASUREMENT TABLE;[04] PARTIAL UPDATE STEP 1;[05] CORRECTED REPAIR STATUS FROM MINOR TO MAJOR.;[06] CERTIFY CORRECTIVE ACTION #5;[07] UPDATED STEPS 1;3;4;[08] EDIT REFERENCE IN STEPS 3;4;[09] CERTIFY CORRECTIVE ACTION EDIT.;[10] VERIFIED STEP 1;3;4; COMPLETE.;[11] PARTIAL UPDATE STEP 6; AMT COMPLETE;[12] STEP 7 PARTIAL UPDATE;[13] STEP 7 AND 8 UPDATE;[14] UPDATED STEPS 8 AND 9;[15] EVALUATED DAMAGE ON FLOOR BEAM AT BS 986.5 RBL 43 WL 208 AND FOUND FLOOR BEAM OUT LIMITS PER SRM 53-70-51-1A-1. REPAIRED FLOOR BEAM AT BS 986.5 FROM LBL 36 TO LBL 46 WL 208 IAW SRM 53-70-51-2R-6. ALTERNATIVE 4. FIG. 205.;[16] VERIFIED CORRECTIVE ACTION COMPLETE; WITH MEASUREMENTS

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