Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 14, 2021
Submitted
August 18, 2021
Operation
Air carrier
Aircraft
N444WN
Make and model
Boeing 7377H4
Aircraft serial
29839
Aircraft time
61,121 hours, 35,983 cycles
Part
Support
Condition
Corroded
Location
Bs 500a-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

FWD CARGO COMPARTMENT FLOOR TO SIDEWALL SUPPORT HAS CORROSION BS 500A+1 TO 500B+17 RBL 25 WL 156 ; / [01] UPDATED MEASUREMENTS; [02] CORROSION ON SUPPORT WAS FOUND TO BE OUT OF LIMITS DUE TO PROXIMITY TO FASTENER HOLES PER SRM 53-00-53-1A-2 FIG 103 DETAIL D; [03] VERIFIED CORROSION ON SUPPORT WAS FOUND TO BE OUT OF LIMITS DUE TO PROXIMITY TO FASTENER HOLES PER SRM 53-00-53-1A-2 FIG 103 DETAIL D; [04] REMOVED FLOOR TO SIDEWALL SUPPORT PER SRM 51-40-02-0G-0; [05] FABRICATED NEW FLOOR TO SIDEWALL SUPPORT FROM EXTRUSION CLAD BAC1496-444#7076 T62 LOT#1453146-2. APPLIED CHEMICAL CONVERSION COATING AND PRIMER. INSTALLED NUTPLATES PER DWG 143A7501; DWG 143A7500; SRM 51-40-05-0G-0; SOPM 20-43-03 AND 51-21-72-370-804; [06] VERIFIED ACTIONS 4 AND 5; [07] INSPECTED AND VERIFIED FABRICATED NEW FLOOR TO SIDEWALL SUPPORT FROM EXTRUSION CLAD BAC1496-444#7076 T62 LOT#1453146-2. APPLIED CHEMICAL CONVERSION COATING AND PRIMER. INSTALLED NUTPLATES PER DWG 143A7501; DWG 143A7500; SRM 51-40-05-0G-0; SOPM 20-43-03 AND 51-21-72-370-804; [08] OK TO INSTALL FLOOR TO SIDE WALL SUPPORT REPLACEMENT.; [09] VERIFIED OK TO INSTALL; [10] INSTALLED FCB FLOOR TO SIDE WALL SUPPORT FROM BS500A - BS500D RBL25; WL156; IAW SRM 51-40-02-0G-0 AND BOEING DWG. #143A7500.; [11] VERIFIED INSTALLATION OF FCB FLOOR TO SIDE WALL SUPPORT FROM BS500A - BS500D RBL25; WL156; IAW SRM 51-40-02-0G-0 AND BOEING DWG. #143A7500.; [12] VERIFIED CARD COMPLETE

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