SDR AALA202011109013

Service difficulty report · Door Sill · Boeing 737823

Difficulty date: November 10, 2020
Submitted: December 1, 2020
Operation: Air carrier
Aircraft: N817NN
Make and model: Boeing 737823
Aircraft serial: 29558
Aircraft time: 32,890 hours, 13,286 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Door Sill
Part number: 147A8540U8
Condition: Corroded
Location: Fuselage
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

AIRCRAFT IN BASE MAINTENANCE. CORROSION OF INNER CHORD NEAR R2 DOOR SILL UNDER FLOOR PANEL AT STA 986.5 AND RBL 58, MEASURING L=3.8 IN, W=2.0 IN, D=0.025 IN. REPLACED INNER CHORD WITH NEW, IAW DRAWING 147A8501. SUPPLEMENTAL INFORMATION. INITIAL REPORT IDENTIFIED AS A LEVEL 2 FINDING IN ERROR, REPORT CORRECTED TO REFLECT PROPER LEVEL.