Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 29, 2023
Operation
Air carrier
Aircraft
N297WN
Make and model
Boeing 7377H4
Aircraft serial
32542
Aircraft time
51,861 hours, 31,224 cycles
Part
Intercostal
Part number
UNKNOWN
Condition
Cracked
Location
Zn 200 Fus Top
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

CRACKED INTERCOSTAL AT FWD CABIN BS344+5 RBL50 WL208.<[01] NO LIMITS FOUND IN SRM FOR TYPE OF DAMAGE.<BR>DAMAGE TO BE REMOVED PER SRM 51-10-02-0G-0 AND SUBMITTED TO ENGINEERING FOR FURTHER REPAIR INSTRUCTIONS .;[02] CUT OUT CRACK IN INTERCOSTAL FLANGE AT BS344+5 RBL50 WL208 PER SRM 51-10-02-0G-0.DAMAGE CUT OUT DIMENSION WAS 1'X .9';[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2.;[04] REQUEST NDI TO VERIFY CRACK FREE CONDITION AND OPEN HOLE INSPECTION.;[05] ACCOMPLISHED HFEC SURFACE SCAN OF CUT EDGE IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23. NO CRACKS NOTED.<BR><BR>ACCOMPLISHED HFEC ALL INITIAL FASTENER HOLES COMMON TO REPAIR AREA AW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 16. NO CRACKS NOTED.<BR><BR>EQUIPMENT USED: NORTEC 600 ID: ATS1465 CAL DUE: 09/2023;[06] VERIFIED APPLICABILITY OF SRM 53-10-51-2R-6;[07] REQUEST DVI INSPECTION OF THE REPAIR AREA;[08] FABRICATED REPAIR PARTS ITEM 1 FILLER FROM 7075-T6 0.063' C LOT # 1498631-1; ANGLE 3 FROM BAC1503-100571#7075-T6511 LOT# 1340158-1;ITEM 5 FILLER FROM 7075-T6 0.020' LOT 1503264-1 AND ITEM 7 FITTING FABRICATED ON COSTUMER RO # 928268-SWA-2.1 LOCATED DRILLED APPLIED CHEMICAL CONVERSION COAT ;PRIMED INITIAL PARTS AND NEW PARTS ALL I.A.W SRM 53-10-51-2R-6 PAR 4.F-MINSTALLED REPAIR PARTS BS344+5 RBL50 WL208 I.A.W SRM 53-10-51-2R-6 PAR 4.N-Q. COMPLETED TASK.;[11] VERIFIED CORRECTIVE ACTION 10;[12] VERIFIED MEASUREMENT TABLE

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