Service difficulty report · Web · Boeing 7378H4

Difficulty date
January 17, 2025
Submitted
February 27, 2025
Operation
Air carrier
Aircraft
N8608N
Make and model
Boeing 7378H4
Aircraft serial
36638
Aircraft time
40,188 hours, 19,212 cycles
Part
Web
Condition
Corroded
Location
Zone 100
Stage of operation
IN
How discovered
V
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

AFT WET AREA; BS 947 RBL 52 TO LBL 5 +/- FLOORBEAM T CAP CORRODED. WIDE SPREAD AND AS MARKED.<[01] REMOVED DAMAGE; ORIG. .180; MATERIAL LOSS .090. REMAINING .090; FOUND TO BE OUT OF LIMITS REF B737-NG SRM 53-70-51-1A-1 FIG 104 DETAIL C; ACCOMP. HFEC TRIMMED EDGES & ALL HOLES COMMON TO UPPER CHORD IN WEB. PER MX REQUEST; IAW B737 NDT MAN. 51-00-00 PROC 23 & 16; PT6.NO CRACK INDICATIONS FOUND. #T8257F . DUE 13 MAY 25.; MATERIAL I'D FOR -1 T-CHORD 53700002-001 PO 1111889.1; -2 ANGLES BAC1490-2885 7075-T62 CLAD PO 1099692.2; AND -3 STRAPS 7075-T6 .125 ALUMINUM SHEET CLAD PO 1106304.1 REF B737-NG SRM 53-70-51-2R-5 TABLE 201 AND SWA DWG 53700002 REV A; APPLIED ALODINE ON REPAIR PARTS -1 T-CHORD; -2 ANGLES; -3 STRAPS REF B737-NG SRM 53-70-51-2R-5; SRM 51-20-01. OK TO INSTALL REPAIR PARTS -1 T-CHORD; -2 ANGLES; -3 STRAPS; INSTALLED REPAIR PARTS -1 T-CHORD; -2 ANGLES; -3 STRAPS REF B737-NG SRM 53-70-51-2R-5; REMOVED AND INSTALLED INTERCOSTAL AND FLOOR SUPPORTS REQUIRED FOR REPAIR REF B737-NG SRM 51-40-02;[02] APPLIED PRIMER ON REPAIR PARTS -1 T-CHORD; -2 ANGLES; -3 STRAPS REF B737-NG SRM 53-70-51-2R-5; SOPM20-41-02. OK TO INSTALL REPAIR PARTS -1 T-CHORD; -2 ANGLES; -3 STRAPS; INSTALLED REPAIR PARTS -1 T-CHORD; -2 ANGLES; -3 STRAPS REF B737-NG SRM 53-70-51-2R-5; REMOVED AND INSTALLED INTERCOSTAL AND FLOOR SUPPORTS REQUIRED FOR REPAIR REF B737-NG SRM 51-40-02. VERIFIED WORK AND WORK STEPS.

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