SDR UALA2011071903673

Service difficulty report · Intercostal · Boeing 757222

Difficulty date: July 18, 2011
Submitted: July 28, 2011
Operation: Air carrier
Aircraft: N574UA
Make and model: Boeing 757222
Aircraft serial: 26686
Aircraft time: 61,428 hours, 22,635 cycles
Engine: Pwa PW2037
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
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

INTERCOSTALS CORRODED WHERE ATTACHED TO FLOORBEAM UPPER CHORD AT BS 365 FROM RBL 24 TO RBL 45. MAJOR REPAIR ACCOMPLISHED: REMOVED SUPPORT CHANNEL FROM STA 400-418 RBL 10-25 AND STA 365-418 RBL 12-25 AND INTERCOSTAL FROM STA 365-418 RBL 24 & RBL 45 IAW SRM. FABRICATED 2 EA INTERCOSTALS FROM STA 365-418 RBL 24 & RBL 45 IAW BOEING DWG 141N5131. TREATED AND PRIMED NEW INTERCOSTALS IAW 029887AMM. APPLIED TOP COAT PAINT. INSTALLED 2 EA INTERCOSTAL RBL 24 & RBL 45 AND SUPPORT PANEL STA 365 -418 RBL 10-25 AND RBL 12-25 IAW B757.