SDR ASAA2022070239442

Service difficulty report · Intercostal · Boeing 737890

Difficulty date: July 2, 2022
Submitted: August 11, 2022
Operation: Air carrier
Aircraft: N562AS
Make and model: Boeing 737890
Aircraft serial: 35091
Aircraft time: 58,050 hours, 17,117 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Intercostal
Part number: 141A56901
Part serial: NSN
Condition: Corroded
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

MAIN CABIN FLOOR STA 294 TO STA 312, LBL12, INNERCOSTAL HAS CORROSION AT FASTENER HOLES. GROUNDED - YES. REMOVED CORROSION FROM , STA 294 -312, BLB 12 INNERCOSTAL ORIGINAL THICKNESS OF 0.080", WITH 0.040" LOSS AND 0.040" REMAINING FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-10-51.REM AND REPLACED INNERCOSTAL IAW B737-800 SRM 51-40-02, REF BOEING DRAWING 141A5600,J, T8224B.