Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 30, 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 500c Rbl 24
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 SIDEWALL SUPPORT FWD CARGO BAY BS 500C +14 RBL 24 WL 156 ; / [01] VERIFIED APPLICABILITY OF SRM 53-30-53-0I-2 FOR IDENTIFICATION AN SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION FROM FLOOR TO SIDEWALL SUPPORT FWD CARGO BAY BS 500C+14 RBL24 WL156; P/N 143A7501-4; IN AREA 1''X.5''X0.020'' DEEP; ORIGINAL THICKNESS 0.040''; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2; PAR. 4.A(2) FIG. 103 DETAIL A. <BR>TOOL USED: DEPTH GAGE ID:ATS2472; DUE DATE: 06/2022; [03] VERIFIED REMOVED CORROSION FROM FLOOR TO SIDEWALL SUPPORT FWD CARGO BAY BS 500C+14 RBL24 WL156; P/N 143A7501-4; IN AREA 1''X.5''X0.020'' DEEP; ORIGINAL THICKNESS 0.040''; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2; PAR. 4.A(2) FIG. 103 DETAIL A.; [04] RECEIVED NEW FLOOR TO SIDEWALL SUPPORT WITH P/N 143A7501-186 LOT. 146538-1; LOCATED AND DRILLED BETWEEN BS 500A - 500D RBL 24 WL 156 IAW SRM 51-40-05-0G-0;DWG 143A7500; DWG#143A7505. OK TO INSTALL.; [09] INSTALLED SIDEWALL SUPPORT WITH P/N 143A7501-186 LOT. 146538-1; BETWEEN BS 500A - 500D RBL 24 WL 156 IAW SRM 51-40-02-0G-0;DWG 143A7500.; [10] INSTALLED FLOOR TO SIDEWALL SUPPORT ANGLE AT BS 500A - 500D RBL 24 WL 156 IAW SRM 51-40-02-0G-0;DWG 143A7500;

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