Service difficulty report · Support · Boeing 7377H4

Difficulty date
December 8, 2021
Submitted
December 22, 2021
Operation
Air carrier
Aircraft
N910WN
Make and model
Boeing 7377H4
Aircraft serial
36618
Aircraft time
45,600 hours, 27,244 cycles
Part
Support
Condition
Corroded
Location
Bs 500a-500c
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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 FWD CARGO BAY RBL24; BS500A; BS500A+10; BS500A+18; BS500B+18; BS500C+6. ; / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 500A+10 RBL 24 WL 156 IN 1'X1' AREAS WITH 0.015 REMOVED FROM ORIG 0.040; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DEPTH GAUGE ATS 2678 S/N UNKNOWN; [02] VERIFIED CORRECTIVE ACTION ENTRY 1.; [03] FABRICATED FLOOR TO SIDEWALL SUPPORT BS 500A -500D RBL 24 IAW SRM 51-40-05-0G-0 AND DWG 143A7501; APPLIED CHEMICAL CONVERSION COATINGS AND PRIMER PER SRM 51-20-01-0G-0 <BR>MATERIAL USED<BR>EXTRUSION BAC1496-444#7075T62 LOT 1475361-1; [04] INSTALLED NUTPLATES ON FLOOR TO SIDEWALL SUPPORT BS 500A-500D RBL 24 IAW DWG 143A7501; [05] VERIFIED CORRECTIVE ACTION ENTRIES 3. AND 4.; [06] COMPLETED ALL STEPS; [07] VERIFIED COMPLETE

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