Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 29, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N447WN
Make and model
Boeing 7377H4
Aircraft serial
33720
Aircraft time
58,733 hours, 34,620 cycles
Part
Support
Condition
Corroded
Location
Bs 929 Rbl 22
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 FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS929 RBL22 WL175. ; / [01] VERIFIED APPLICABILITY OF SRM 53-70-53-0I-2FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE.; [02] REMOVED CORROSION FROM ACB FLOOR TO SIDEWALL SUPPORT BS929 RBL22 WL175 IAW SRM 51-10-02-0G-0; P/N 147A7501-17 IN AREA 1''X.5''X0.018''DEEP; ORIGINAL THICKNESS 0.040''; FOUND TO BE OUT OF LIMIT IAW SRM 53-00-53-1A-2 PAR. 4.A(2) FIG. 103; DETAIL A.; [03] CORRECTED MEASUREMENTS; [04] REPAIR BY REPLACEMENT; [05] VERIFIED REMOVED CORROSION FROM ACB FLOOR TO SIDEWALL SUPPORT BS929 RBL22 WL175 IAW SRM 51-10-02-0G-0; P/N 147A7501-17 IN AREA 1''X.5''X0.018''DEEP; ORIGINAL THICKNESS 0.040''; FOUND TO BE OUT OF LIMIT IAW SRM 53-00-53-1A-2 PAR. 4.A(2) FIG. 103; DETAIL A.; [06] REMOVED FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS887 TO BS947.5 RBL22 WL175 IAW SRM 51-40-02-0G-0; [07] THIS DISCREPANCY WILL ACCOMPLISHED ON CARD TTG8Q005ZD3N; [08] THIS DISCREPANCY WILL BE ACCOMPLISHED ON CARD TTG8Q005ZD3N; [09] VERIFIED DISCREPENCY TO BE COMPLETED ON FAULT TTG8Q005ZD3N

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