SDR ASAA2025020456154

Service difficulty report · Door Sill · Boeing 737890

Difficulty date: February 4, 2025
Submitted: February 25, 2025
Operation: Air carrier
Aircraft: N520AS
Make and model: Boeing 737890
Aircraft serial: 36481
Aircraft time: 49,914 hours, 17,596 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Door Sill
Part number: 143A8122
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 PIT, CARGO DOOR SILL STRUCTURE ON TOP HAS CORROSION MARKED. GROUNDED - YES. EVALUATED AREA AND REMOVED DAMAGE, ORIGINAL: .045, REMOVED: .012, REMAINING: .033 & IS FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 51-60-15-1A-1. REMOVED DAMAGED THRESHOLD WEB IAW B737-800 SRM 51-40-02. LOCATED & DRILLED NEW THRESHOLD WEB IAW B737-800 SRM 5140-05 P/N: 143A8122-10, PO: 11137272.1.. INSTALLED THESHOLD WEB IAW BOEING DWG 143A8330, REV: G.