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 869 Rbl 19
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 BS869 RBL19 WL165. ; / [01] VERIFIED APPLICABILITY OF SRM 53-60-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION FROM TO SIDEWALL SUPPORT AT AFT CARGO BAY BS869 RBL19 WL165; IAW SRM 51-10-02-0G-0;P/N 146A7502-6 IN AREA 0.8''X0.3''X0.020''DEEP. ORIGINAL THICKNESS 0.040'' FOUND TO BE OUT F LIMITS IAW SRM 53-00-53-1A-2; PAR. 4.A(2); FIG. 103; DETAIL C.; [03] REMOVED FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS867 TO BS887 IAW SRM 51-40-02-0G-0; [04] VERIFIED REMOVED CORROSION FROM TO SIDEWALL SUPPORT AT AFT CARGO BAY BS869 RBL19 WL165; IAW SRM 51-10-02-0G-0;P/N 146A7502-6 IN AREA 0.8''X0.3''X0.020''DEEP. ORIGINAL THICKNESS 0.040'' FOUND TO BE OUT F LIMITS IAW SRM 53-00-53-1A-2; PAR. 4.A(2); FIG. 103; DETAIL C.; [05] FABRICATED AND LOCATED AND DRILLED NEW SIDEWALL SUPPORT FROM MAT. P/N BAC1496-377 #7075T62; LOT 1466224-1 AT AFT CARGO BAY BETWEEN BS867 TO BS887; RBL 19 WL 165. IAW SRM 51-40-05-0G 0 AND DWG 146A7500 APPLIED CHEMICAL CONVERSION COATING IAW SRM 51-20-01 OK TO PRIMER; [06] VERIFIED REMOVED FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS867 TO BS887 IAW SRM 51-40-02-0G-0 AND VERIFIED FABRICATED; LOCATED; AND DRILLED NEW SIDEWALL SUPPORT FROM MAT. P/N BAC1496-377 #7075T62; LOT 1466224-1 AT AFT CARGO BAY BETWEEN BS867 TO BS887; RBL 19 WL 165 IAW SRM 51-40-05-0G 0 AND DWG 146A7500

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