Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
May 8, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N959WN
Make and model
Boeing 7377H4
Aircraft serial
36674
Aircraft time
38,285 hours, 23,370 cycles
Part
Intercostal
Condition
Cracked
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

INTERCOSTAL AT BS 380-400 BL 0 WL 208 IS CRACKED AT FASTENER HOLE AT BS 380+16'<[01] VERIFIED APPLICABILITY SRM 53-30-51-1A-1 ALLOWABLE DAMAGE 1 - SECTION 43 FLOOR STRUCTURE.;[02] ACCOMPLISHED EVALUATION ON INTERCOSTAL FWD WET AREA STA-380-400 BL-0 WL208 IAW SRM 53-30-51-1A-1 AND NO FOUND ALLOWABLE DAMAGE; PART REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02-0G-0 PART 9.C;[03] REMOVED INTERCOSTAL FWD WET AREA STA-380-400 BL-0 WL208 IAW SRM 51-40-02-0G-0.;[04] LOCATED AND DRILLED INTERCOSTAL SUPPORT ANGLE FROM BS380-BS4000 BL0 PN#143A5410-170 IAW SRM 51-40-02 AND IAW DWG#143A5400. OK TO INSTALL;[05] LOCATED AND DRILLED INTERCOSTAL SUPPORT ANGLE FROM BS380-BS400 BL0 PN#143A5410-170 IAW SRM 51-40-05 AND IAW DWG#143A5400. OK TO INSTALL;[06] VERIFIED CORRECTIVE ACTION 5; OK TO INSTALL GIVEN.;[07] INSTALLED INTERCOSTAL SUPPORT ANGLE IAW SRM 51-40-02-0G-0 AND DWG#143A5400.;[08] VERIFIED CORRECTIVE ACTION 7.;[09] VERIFIED JOB COMPLETE.

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