SDR ASAA2017050120748

Service difficulty report · Intercostal · Boeing 737890

Difficulty date: May 1, 2017
Submitted: May 16, 2017
Operation: Air carrier
Aircraft: N581AS
Make and model: Boeing 737890
Aircraft serial: 35188
Aircraft time: 38,199 hours, 11,504 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Part number: 141A52136
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

COCKPIT FLOOR STRUCTURE UNDER PANEL 211AF IS CORRODED. GROUNDED - YES. REMOVED CORROSION FROM LATERAL INTERCOSTAL-ORIGINAL THICKNESS .060,REMAINING .039, REMOVED .021 AND SUPPORT CHANNEL-ORIGINAL THICKNESS .040,REMAINING .028,RE-MOVED .012 BOTH FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51, REPAIRED LATERAL INTERCOSTAL AND SUPPORT CHANNEL IAW EA 800-53EA-18793 DATED 05-14-17.