Service difficulty report · Spar · Boeing 737924ER

Difficulty date
January 3, 2025
Submitted
January 6, 2025
Operation
Air carrier
Aircraft
N75428
Make and model
Boeing 737924ER
Aircraft serial
31633
Aircraft time
51,018 hours, 18,030 cycles
Part
Spar
Part number
111A1111
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
O
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 INDICATION AT CENTER WING REAR SPAR VERTICAL PRESSURE WEB BETWEEN LBL 40.00 AND LBL 45.64, LEFT MLG, REF T29-5710-1-0016. AND REPEAT INSPECTIONS AT 36000 FLIGHT CYCLES PLACING RE-INSPECTION REQUIREMENTS PER SRM57-10-10-2R-3 TABLE 20 5 WITH INSPECTION THRESHOLD OF 56000 FLIGHT CYCLES AFTER REPAIR TOMC APPROVED. DIP ISSUED IAW SRM 57-10-10-2R-3. INSPECT REPAIR TOMC-APPROVAL FROM SC1ELBYC COMMENT AT CENTER WING REAR SPAR VERTICAL PRESSURE WEB BETWEEN LBL 40.00 AND LBL 45.64 PER INSPECTION REQUIREMENTS IN SRM 57-10-10-2R-3 TABLE 205 AT INSPECTION THRESHOLD 56,000 FLIGHT CYCLES AFTER REPAIR INSTALLATION AND 36000 FLIGHT CYCLES THEREAFTER. REPAIRED WING REAR SPAR VERTICAL PRESSURE WEB BETWEEN LBL 40.00 (INFORMATION FROM ABOVE) ESFR NO. 1038049. REPAIR ACCOMPLISHED WAS CAT. B REPAIR ALTERNATIVE 2, CONFIRMED B QC AND LBL 45.64 LEFT MLG IAW SRM 57-10-10-2R-3, THIS IS A CAT Y V931928. EGORY B REPAIR, REQUIRE SUPPLEMENTAL INSPECTIONS AS GIVEN IN SRM 57-10-10-2R-3 TABLE 205.