Service difficulty report · Shield · Boeing 7377H4

Difficulty date
July 31, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N491WN
Make and model
Boeing 7377H4
Aircraft serial
33867
Aircraft time
53,758 hours, 31,898 cycles
Part
Shield
Condition
Corroded
Location
Bs 500
Stage of operation
IN
How discovered
V
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 FWD CARGO BAY BS500+5.5 LBL25 WL156. ; / [01] EVALUATED CORROSION; FOUND 0.015 REMOVED FROM ORIG 0.040 IN A 1'X 1' AREA FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE PART# ATS2472 S/N UNKNOWN; [02] VERIFIED CORRECTIVE ACTION ENTRY 1.; [03] REMOVED FCB LH FLOOR TO SIDEWALL SUPPORT BS396-500D; IAW SRM 51-40-02-0G-0.; [04] FABRICATED REPAIR PARTS; FOR FCB LH FLOOR TO SIDEWALL SUPPORT; BS396-500D; SPLICE AT BS 480+10; IAW SRM 53-00-53-2R-5. MATERIAL; BAC1496-444#7075T62; LOT# 1457271-1. SRM 51-40-05-0G-0; DWG 143A7500. AND; OK TO PRIME REPAIR PARTS.; [05] ALSO INCLUDING APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-53-2R-5; [06] VERIFIED CORRECTIVE ACTION #4 & #5.<BR>OK TO PRIME REPAIR PARTS GIVEN.; [07] PRIMED AND ASSEMBLED REPAIR PARTS FOR FCB LH FLOOR TO SIDEWALL SUPPORT; BE396-500D; LBL25; IAW SRM 53-00-53-2R-5; REPAIR 5.; [08] VERIFIED CORRECTIVE ACTION ITEM 7; [09] ENAMEL TOP COAT AND CIC ACCOMPLISHED PER CUTOMER CARD# TTG8Q004G8AZ.<BR> REQUEST OK TO INSTALL.; [10] VERIFIED ENAMEL TOP COAT AND CIC ACCOMPLISHED PER CUTOMER CARD# TTG8Q004G8AZ.<BR>OK TO INSTALL.; [11] INSTALLED FCB SIDEWALL SUPPORT L/H BS 396 TO 500D LBL 25 IAW. SRM 51-40-02 AND DWG: 143A7500 REV: A; [12] VERIFIED CORRECTIVE ACTION 11; [13] VERIFIED JOB COMPLETED

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