Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
June 1, 2023
Submitted
July 5, 2023
Operation
Air carrier
Aircraft
N962WN
Make and model
Boeing 7377H4
Aircraft serial
36963
Aircraft time
38,452 hours, 23,554 cycles
Part
Stringer
Part number
UNKNOWN
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 STRINGER AT AREA AFT OF FWD CARGO BAY BS535 S-23R WL164.<[01] CUT OUT DAMAGE SECTION FROM BS 500D + 3 TO 540 PER REF SRM 51-10-02;[02] REMOVED SHEAR TIE BETWEEN STR 23-22 ABD BS 520 PER REF SRM 51-40-02;[03] REQUIRE NDI TO VERIFY CRACK FREE CONDITION ON CUT OUT AREA OF THE STRINGER.;[04] HFEC INSPECTED CUT OUT AREA IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23.<BR>NO CRACKS NOTED.<BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS1465 CAL DUE: 09/23;[05] RECEIVED STRINGER SECTION FROM OSS (1E/A) HFAB53-STR-011 DWG#143A3261-190 SHEET-126 7075T6 JOB#560514 CUSTOMER RO#922984-SWA REFER TO SRM 53-00-03-2R-1 REPAIR-1 TABLE-203.;[06] FABRICATED; LOCATED AND DRILLED NEW STRINGER SECTION AND SPLICE REPAIR (LOT#1526640-1) IAW SRM 53-00-03-2R-1 REPAIR#1 PART 4.E TO 4.I TABLE-204 FIG.205; REFER TO EA-23-153-01792-WIP1 STEP 7<BR>OK TO TREAT AND PRIME.;[07] VERIFIED CORRECTIVE ACTION #5; 6

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