SDR ASAA2025061759329

Service difficulty report · Web · Boeing 737990ER

Difficulty date: June 17, 2025
Submitted: July 10, 2025
Operation: Air carrier
Aircraft: N263AK
Make and model: Boeing 737990ER
Aircraft serial: 62471
Aircraft time: 31,242 hours, 10,172 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Part number: 146A812325
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 CARGO DOOR CUTOUT HAS CORROSION UNDER SCUFFPLATE AREA ON TOPSIDE. GROUNDED - YES. REMOVED LOWER SILL PLATE, BLENDED AREA. ORIG THICKNESS .056 MAT LOSS .018 NEW THICKNESS .038, AREA OUT OF LIMITS PER B737-900 SRM 53-00-01-1A-6. INSTALLED NEW WEB P# 146A8173-25 PER B737-900 SRM 51-40-05, SRM 51-40-02 AND BDWG 146A8340 AND BDWG 146A8120 REV.T REF NRC G2184706 FOR LOWER SILL PLATE INSTALL PO#1125692.1.