SDR SWAA2025102721975

Service difficulty report · Web · Boeing 7377H4

Difficulty date: October 6, 2025
Submitted: October 27, 2025
Operation: Air carrier
Aircraft: N445WN
Make and model: Boeing 7377H4
Aircraft serial: 29841
Aircraft time: 70,257 hours, 42,212 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
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

CORROSION UPPER MAIN SILL WEB LOCATED BETWEEN BS440 TO BS492 AT LEVEL STR 18R AND WL 198.5. REPLACED WEB AND FASTENERS LOCATED BTW BS440 TO BS492 AT LEVEL STR18R RBL70 WL 198.5 IAW SRM 51-40-02-0G-0, SRM 51-10-02, ITEM 9, DWG 143A8111, SHEET 12, REV A, & DWG 143A0081, SHEET 38, REV B.

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