Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
June 15, 2021
Submitted
July 22, 2021
Operation
Air carrier
Aircraft
N418WN
Make and model
Boeing 7377H4
Aircraft serial
29823
Aircraft time
65,911 hours, 38,694 cycles
Part
Floorbeam
Condition
Cracked
Location
Bs 328
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

B.S. 328 FLOOR BEAM IS CRACKED AT R.B.L. 24; W.L. 208.1; COMING OUT OF FASTENER HOLE. ; / [01] EVALUATED CRACK L=0.300'' ON FLOOR BEAM BS 328 RBL 24 WL 208.1 COMING OUT OF FASTENER HOLE AND FOUNT TO BE OUT OF LIMITS IAW SRM 53-10-51-1A-1 PART 4C; FLOOR BEAM REPAIRABLE IAW SRM 53-10-51-2R-7 (REPAIR 7 - SECTION 41 - DAMAGE ON THE UPPER CHORD OF THE FLOOR BEAM AT STA 328 - PERMANENT); [FLOOR BEAM REPAIRABLE IAW SRM 53-10-51-2R-7 (REPAIR 7 - SECTION 41 - DAMAGE ON THE UPPER CHORD OF THE FLOOR BEAM AT STA 328 - PERMANENT); [04] ACCOMPLISHED CUT AND REMOVE DAMAGE OF THE UPPER CHORD OF THE FLOOR BEAM BS 328 RBL 2 TO RBL 65 IAW SRM 53-10-51-2R-7 PART 4C.; [24] FABRICATED; LOCATED AND DRILLED NEW {-1} T-CHORD FROM BAC1505-100224 7050-T765121 LOT# 1425370-2; {-2} ANGLE 2 E/A FROM BAC1490-2811 7075-T6 CLAD LOT# 1446624-1; {-3} ANGLE 2 E/A FROM BAC1490-2900 7075T6 LOT# 1425362-1 IAW SRM 53-10-51-2R-7 REPAIR 7 TABLE 201; [25] FABRICATED; LOCATED AND DRILLED NEW {-1} T-CHORD FROM BAC1505-100224 7050-T765121 LOT# 1425370-2; {-2} ANGLE 2 E/A FROM BAC1490-2811 7075-T6 CLAD LOT# 1446624-1; {-3} ANGLE 2 E/A FROM BAC1490-2900 7075T6 LOT# 1425362-1 IAW SRM 53-10-51-2R-7 REPAIR 7.

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