SDR ASAA2025082260940

Service difficulty report · Web · Boeing 737990ER

Difficulty date: August 22, 2025
Submitted: September 18, 2025
Operation: Air carrier
Aircraft: N471AS
Make and model: Boeing 737990ER
Aircraft serial: 41703
Aircraft time: 40,738 hours, 12,607 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Part number: 654A000358
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

FWD CARGO DOOR WEB IS CORRODED IN NUMEROUS PLACES. GROUNDED - YES. CORROSION REMOVED, ORIGINAL THICKNESS .045, MAT LOSS .0175, REMAINING THICKNESS .0275, AREA OUT OF LIMITS PER B737-900ER SRM 53-30-15-1A-1 REMOVED WEB AND INSTALLED IAW SRM 51-40-02 AND DWG 143A8122.