Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
June 9, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N963WN
Make and model
Boeing 7377H4
Aircraft serial
36676
Aircraft time
38,123 hours, 23,431 cycles
Part
Stringer
Part number
UNKNOWN
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

CRACKED STRINGER END AT AREA AFT OF FWD CARGO BAY BS535 S-23R WL164. MARKED<[01] VERIFIED APPLICABILITY OF SRM 53-00-03-2R-1 REPAIR 1 - REPAIR FOR A TYPE I; TYPE II; OR TYPE IV FUSELAGE STRINGER;[02] ACCOMPLISHED CUT-OUT AND REMOVAL OF DAMAGE IAW SRM 53-00-03-2R-1 REPAIR 1 PART 4.A-B;[03] REQUEST FOR NDI HFEC INSPECTION ON REPAIR AREA IAW SRM 53-00-03-2R-1 REPAIR 1 PART 4.C;[04] HFEC INSPECTED TRIMMED EDGE OF DAMAGE CUTOUT PER 737NDT PART 6 51-00-00 PROCEDURE 23. NO CRACKS FOUND. TOOL ATS1465 DUE 09/2023.;[05] VERIFIED CORRECTIVE ACTIONS 1 AND 2.;[06] UPDATED PARTIAL STEPS 1 AND 2;[07] FABRICATED AND DRILLED NEW STRINGER SECTION HFAB53-STR-011 CUSTOMER RO 924301-SWA-3 AND HAT SECTION HFAB53-HC-011 CUSTOMER RO NO 924301-SWA-1; APPLIED CHEMICAL CONVERSION COATING LAYER IN THE REPAIR PARTS I.A.W SRM 53-00-03-2R-1 AND SRM 51-20-01. OK TO PRIME REPAIR PARTS;

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