Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
April 28, 2023
Submitted
May 25, 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

CRACK ON STRINGER S-23L TERMINUS. STA 540<[01] UPDATED MEASUREMENT TABLE.[08] RECEIVED NEW STRINGER SECTION S-23L FROM OSS RO. 917127-SWA-3 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4D AND EA 23-153-01405.;[09] VERIFIED CORRECTIVE ACTION 8.;[10] RECEIVED STRINGER SPLICE SECTION S-23L FROM OSS RO. 917127-SWA-1 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4D.;[11] VERIFIED CORRECTIVE ACTION 10;[12] LOCATED; DRILLED; APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS AND REPAIR AREA STRINGER 23L BS 500D+11'-540 IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4E-J AND EA 23-153-01405.;[13] OK TO INSTALL;[14] VERIFIED CORRECTIVE ACTION 12 AND 13. OK TO INSTALL IS GIVEN.;[15] INSTALLED ALL FASTENERS COMMON TO SKIN AND STRINGER SECTION STR-23L BS 500D+11'-540 EXCEPT FASTENER COMMON TO SPLICE IAW SRM 53-00-03-2R-1 REP. 1 PAR. 4K; EA 23-153-01405 AND DWG 143A3230[20] INSTALLED SPLICE REPAIR AT FCB STRINGER 23L BETWEEN 500D+4' TO 500D+17' IAW SRM 53-00-03-2R-1 REP. 1 AND EA NO:23-153-01-405 REV:A.

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