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 761-773
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 BS761 - BS773 LBL22 WL156. ; / [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] UPDATED MEASUREMENTS; [04] VERIFIED UPDATED MEASUREMENTS; [05] 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; [06] REMOVED ACB FLOOR TO SIDEWALL SUPPORT BS727 - BS847; LBL22; WL156 PER SRM 51-40-02-0G-0; [07] FABRICATED; LOCATED AND DRILL NEW FLOOR TO SIDEWALL SUPPORT AT ACB BS727 - BS847; LBL22; WL156 USING BAC1496-377#7075T62 LOT#1464457-1 PER SRM 51-40-05-0G-0 AND DWG 146A7500.; [08] APPLIED CHEMICAL CONVERSION COATING TO FLOOR TO SIDEWALL SUPPORT PER AMM 51-21-41-370-802; [09] VERIFIED FABRICATION; LOCATE AND DRILL OF NEW FLOOR TO SIDEWALL SUPPORT AT ACB BS727 - BS847; LBL22; WL156 USING BAC1496-377#7075T62 LOT#1464457-1 PER SRM 51-40-05-0G-0 AND DWG 146A7500<BR>VERIFIED APPLICATION OF CHEMICAL CONVERSION COATING TO FLOOR TO SIDEWALL SUPPORT PER AMM 51-21-41-370-802;

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