Service difficulty report · Gusset · Boeing 7377H4

Difficulty date
March 15, 2023
Submitted
April 12, 2023
Operation
Air carrier
Aircraft
N956WN
Make and model
Boeing 7377H4
Aircraft serial
36672
Aircraft time
38,869 hours, 23,696 cycles
Part
Gusset
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

STRINGER 19R CRACKED BS 500D OUTBOARD HOLE COMMON TO GUSSET<[01] SRM 53-00-03-2R-1 IS FOUND TO BE APPLICABLE; UPDATED MEASUREMENTS CHART.;[02] PARTIAL UPDATE STEP 1;[03] PERFORMED DAMAGE CUTOUT OF STRINGER 19R BETWEEN BS 500C-520 L=22' IAW SRM 53-00-03-2R-1 AND SRM 51-10-02. ACCOMPLISHED HFEC SURFACE SCAN OF CUT OUT IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23. NO CRACKS NOTED.EQUIPMENT USED: NORTEC 600 ID: ATS1465 CAL DUE: 09/2023; RECEIVED (1EA) NEW STRINGER P/N:BAC1498-157#7075T62;LOT:1312472-1; AND (2EA) HAT SECTION P/N:HFAB53-HS-011;LOT:1521673-1;PO/N:910421/1;[09] FABRICATED AND LOCATED AND STRINGER AT FCB STR 19R BETWEEN BS 500C+6' TO BS 500D+9' AND (1EA) HAT SECTION BETWEEN BS 500C TO 500C+11' AND (1EA) HAT SECTION BETWEEN BS 500D+4' TO 500D+14' ON STR 19 IAW SRM 53-00-03-2R-1; PAR 4; STEPS E - H FIG 205.;[10] APPLIED CHEMICAL CONVERSION COATING ON REPAIR PARTS IAW SOPM 51-20-01 AND SRM 53-00-03-2R-1; PAR 4; STEP I; REQUEST OK TO PRIME REPAIR PARTS.;APPLIED PRIMER ON REPAIR PARTS IAW SRM SOPM 20-41-02 ; INSTALLED 100% OF TEMPORARY AND PERMANENT FASTENERS WITH SEALANT C-20 SQUEEZE-OUT TIME AT 21-MAR-2023 UTC TIME 08:05 AT REPAIR PARTS STR 19 BETWEEN BS 500C TO BS 500D+14' PER SOPM 20-50-19 AND SRM 51-40-02; INSTALLED REPAIR PARTS AT FCB ;STR 19 BETWEEN BS 500C TO BS 500D+14' AND APPLIED CIC TO THE REWORKED AREAS. IAW SRM 51-40-02 AND 53-00-03-2R-1 STEPS K-L AND DWG:143A3250 ID:0131 REV:-.

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