Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
April 28, 2023
Submitted
May 30, 2023
Operation
Air carrier
Aircraft
N416WN
Make and model
Boeing 7377H4
Aircraft serial
32453
Aircraft time
70,967 hours, 42,001 cycles
Part
Stringer
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

MAIN DISTRIBUTION BAY CRACK ON END OF STR 26R BS 540<REMOVED DAMAGED SECTION OF STRINGER 26R BS 500D+11'-540 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4-B.;[04] PERFORMED GVI ON REPAIR AREA AND NO ADDITIONAL DAMAGED FOUND IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4-B(1).;[05] VERIFIED CORRECTIVE ACTION 3 AND 4.;[06] VERIIFED CORRECTIVE ACTION 1-4.;[07] ACCOMPLISHED HFEC SURFACE SCAN OF CUT EDGE IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23. NO CRACKS NOTED.<BR><BR>EQUIPMENT USED: NORTEC 600 ID: ATS1465 CAL DUE: 09/2023;[08] RECEIVED NEW STRINGER SECTION S-26R FROM OSS RO. 917135-SWA-3 AND STRINGER SPLICE FROM OSS RO. 917135-SWA-1 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4D.;[09] VERIFIED CORRECTIVE ACTION ITEM 8.;[10] LOCATED; DRILLED; APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS AND REPAIR AREA STRINGER 26R BS 500D+11'-540 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4E-J INSTALLED ALL FASTENERS COMMON TO SKIN AND STRINGER SECTION STR-26R BS 500D+11'-540 EXCEPT FASTENER COMMON TO SPLICE IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4K AND DWG 143A3230;[14] VERIFIED CORRECTIVE ACTION STEP 13.;[15] OK TO INSTALL REPAIR SPLICE AND PARTS REMOVED FOR ACCESS;[16] VERIFIED CORRECTIVE ACTION ITEM; OK TO INSTALL.;[17] COMPLETED INSTALLATION OF REPAIR PARTS AT STR-26R BS500D+11'-540 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4K AND DWG 143A3230.;RII; STEP 1 AND STEP 2 ARE COMPLETE.;[21] CARD IS COMPLETE.

More about the Boeing 737-7H4