Service difficulty report · Intercostal · Boeing 7378H4

Difficulty date
February 6, 2023
Submitted
March 10, 2023
Operation
Air carrier
Aircraft
N8524Z
Make and model
Boeing 7378H4
Aircraft serial
36970
Aircraft time
20,203 hours, 9,817 cycles
Part
Intercostal
Condition
Corroded
Location
Zn 100 Fus Lower
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 LAV A FLOOR MOUNT INTERCOSTAL STA 304-305; LBL 10; WL 208.<[01] UPDATED MEASUREMENT TABLE;[02] EVALUATED CORROSION ON LAV A FLOOR MOUNT INTERCOSTAL STA 304-305; LBL 10; WL 208. FOUND TO HAVE 100% MATERIAL LOSS; .700' BY .600'; OUT OF LIMITS PER SRM 53-10-51-1A-1.;[03] VERIFIED CORRECTIVE ACTION 1 AND 2 AND THE MEASUREMENT TABLE.;[04] LOCATED AND DRILLED NEW LAV A FLOOR MOUNT INTERCOSTAL STA 294- STA 312; LBL 10; WL 200-208 PER SRM 51-40-02-0G-0; SRM 51-40-05-0G-0; DWG# 141A5600 REV N. OK TO INSTALL.;[05] SIGNED PART TABLE;[06] VERIFIED CORRECTIVE ACTION 4 AND 5 WITH OK TO INSTALL GIVEN;[07] INSTALLED NEW LAV A FLOOR MOUNT INTERCOSTAL STA 294- STA 312; LBL 10; WL 200-208 PER SRM 51-40-02-0G-0; DWG# 141A5600 REV N.;[08] COMPLETED STEP 1;[09] VERIFIED CORRECTIVE ACTION 7.<BR>COMPLETED STEP 1;[10] COMPLETED STEPS 2-5;[11] COMPLETED STEPS 2-6.;[12] COMPLETED STEPS 2-6;[13] COMPLETED STEPS 2; 3; AND 5;[14] COMPLETED STEPS 4 AND 6

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