Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
March 19, 2022
Submitted
April 25, 2022
Operation
Air carrier
Aircraft
N762SW
Make and model
Boeing 7377H4
Aircraft serial
27876
Aircraft time
75,107 hours, 44,385 cycles
Part
Stringer
Condition
Corroded
Location
Fuselage
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

LOWER FUSELAGE BETWEEN ST25 TO ST26; STA360 TO STA380 SKIN AREAS BULGING STRINGER 26L CORRODED FROM STA 370 SPLICE TO AFT. SKIN BULGING DUE TO STR 26L EXFOLIATED CORROSION FOUND. / [01] REMOVED PAINT BY STRIPPING AT LOWER FUSELAGE SKIN BETWEEN STA 351.2 AND STA 380 S-27L- S-25L REF B737-700 AMM 51-21-11-150-810.;[34] LOCATED AND DRILLED NEW STRINGER SECTION FROM STA 370 TO STA 410 STR 26L REF B737-7 SRM 53-00-03-2R-1 STEP 4.F AND 51-40-05-0G-0;[35] CORRECTION <BR>LOCATED AND DRILLED NEW STRINGER SECTION FROM STA 370 TO STA 410 STR 26L REF B737-7 SRM 53-00-03-2R-1 STEP 4.F AND 737 SRM 51-40-05-0G-0;[36] (RII) VERIFIED STEPS 34 AND 35.;FABRICATED STRINGER SPLACE AT STR 26L BETWEEN STA 400 TO STA 420 MATERIAL USED BAC1498-116-707562 PO#1760435 REF B737-7 SRM 53-00-01-2R-1 TYPE 1 TABLE 204 FIG 205DETAIL A-A AND SHIMS MATERIAL USED 2024-T3 0.025" 38.LOCATED AND DRILLED STRINGER SPLACE AND SHIMS REF B737-7 SRM 53-00-01-2R-1 AND 51-40-05-0G-0

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