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 407
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 407; RBL 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 FROM FCB FLOOR TO SIDEWALL SUPPORT BS407; RBL24; WL156.5; P/N 143A7501-184 IN AREA 0.9''X0.3''X0.010'' DEEP; ORIGINAL THICKNESS 0.040''; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2; PAR. 4.A(2) FIG. 103 .<BR>TOOL USED DEPTH GAGE; ID:ATS2473; N/S/N; [03] FCB FLOOR TO SIDEWALL SUPPORT BS407; RBL24; WL156.5; REPLACEMENT TO BE ACCOMPLISHED ON TASK CARD #TTG8Q005N9P3; [04] VERIFIED CORRECTIVE ACTIONS 1-3.<BR><BR>CORROSION FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2<BR><BR>PART TO BE REPLACED ON TTG8Q005N9P3; [05] FCB FLOOR TO SIDEWALL SUPPORT BS407; RBL24; WL156.5; REPLACEMENT TO BE ACCOMPLISHED ON TASK CARD #TTG8Q005N9P3; [06] VERIFIED REPLACEMENT TO BE ACCOMPLISHED ON TASK CARD #TTG8Q005N9P3

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