Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 1, 2021
Submitted
July 26, 2021
Operation
Air carrier
Aircraft
N913WN
Make and model
Boeing 7377H4
Aircraft serial
29840
Aircraft time
43,304 hours, 26,170 cycles
Part
Support
Condition
Corroded
Location
Bs 500b
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

CORROSION ON FCB FLOOR TO SIDEWALL SUPPORT BS 500B+17.75; LBL 24; WL 156.5 (MARKED). ; / [01] VERIFIED APPLICABILITY OF SRM 53-30-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION O FCB FLOOR TO SIDEWALL SUPPORT BS500B+17;LBL24;WL156.5; P/N:143A7501-1; IN AREA 0.9''X0.5''X0.012''DEEP; ORIGINAL THICKNESS 0.040'' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PAR.4(2) FIG. 103; DETAIL A.<BR>TOOL USED: DEPTH GAGE ID:ATS2473; N/S/N; [03] CORRECTED MEASUREMENTS; [04] FCB FLOOR TO SIDEWALL SUPPORT BS500B+17.75''; LBL24; WL156.5; REPLACEMENT TO BE ACCOMPLISHED ON TASK CARD TTG8Q005NAAS; [05] VERIFIED CUSTOMER CARD TTG8Q005NAAS WILL BE REPLACE.

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