SDR ASAA2024121254881

Service difficulty report · Web · Boeing 737990ER

Difficulty date: December 12, 2024
Submitted: December 31, 2024
Operation: Air carrier
Aircraft: N236AK
Make and model: Boeing 737990ER
Aircraft serial: 36351
Aircraft time: 28,590 hours, 9,307 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Part number: 146A8123
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 PIT THRESHOLD WEB HAS MULTIPLE SPOTS OF CORROSION. GROUNDED - YES. EVALUATED AFT CARGO THRESHOLD WEB, ORIGINAL THICKNESS: .050, REMOVED: .050, REMAINING: .000, 100% MAT LOSS AND FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1. REMOVED DAMAGED THRESHOLD WEB IAW B737-900 SRM 51-40-02. LOCATED & DRILLED AND INSTALLED NEW THRESHOLD WEB P/N:146A8123U25, PO:1108709.3 IAW B737-900 SRM 51-40-05 AND BOEING DWG:146A8340, REV:G.