SDR ASAA2015070712492

Service difficulty report · Intercostal · Boeing 737890

Difficulty date: July 7, 2015
Submitted: July 21, 2015
Operation: Air carrier
Aircraft: N520AS
Make and model: Boeing 737890
Aircraft serial: 36481
Aircraft time: 24,265 hours, 7,763 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Part number: 146A75058
Condition: Corroded
Location: Bs 747-767
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 BAY INTERCOSTAL AT RBL 21, BS 747 TO 767 IS CORRODED. ACFT GROUNDED. REMOVED CORROSION IAW SRM 53-60-15-1A-1, 4C, 2B. REMOVED INTERCOSTAL IAW SRM 51-40-02. FABRICATED A NEW INTERCOSTAL IAW DWG 146A7505, REV-, AND INSTALLED IAW SRM 51-40-02 & DWG 146A7500, REV- .