Service difficulty report · Support · Boeing 7377H4

Difficulty date
August 26, 2021
Submitted
September 13, 2021
Operation
Air carrier
Aircraft
N966WN
Make and model
Boeing 7377H4
Aircraft serial
36966
Aircraft time
32,714 hours, 19,999 cycles
Part
Support
Part number
143A75014
Condition
Corroded
Location
Bs 500a-500d
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 B.S. 500A-500D; R.B.L. 24; W.L. 154. ; / REPAIR BY REPLACEMENT IAW SRM 51-10-02-0G-0.; [03] CORROSION DAMAGE WAS REMOVED IAW SRM 53-00-53-1A-2; [04] CORRECTION. CHANGED POTENTIAL CORROSION LEVEL FROM LEVEL 1 TO LEVEL 2. (OUT OF ALLOWABLE DAMAGE LIMITS); [05] VERIFIED CORRECTIVE ACTION ITEMS 1 THRU 4. OUT OF ALLOWABLE LIMITS PER SRM 53-00-53-1A-2.; [06] CALIBRATION TOOL DEPTH GAUGE<BR>ID : ATS2472<BR>S/N : UNKNOWN<BR>DUE : 06/2022; [07] LOCATED; DRILLED; AND COUNTERSANK NEW FLOOR TO SIDEWALL SUPPORT MATERIAL USING BAC1496-444#7075T62 LOT# 1466509-1 IAW SRM 51-40-05-0G-0; SRM 51-40-08-0G-0; AND DWG 143A7501 REV:-; [08] APPLIED CHEMICAL CONVERSION COATING AND PRIMER IAW SRM 51-20-01-0G-0 AND SOPM 20-41-02; INSTALLED FLOOR TO SIDEWALL SUPPORT AT B.S. 500A-500D; R.B.L. 24 W.L. 154 IAW SRM 51-40-02 AND DWG 143A7500 AND 143A7505

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