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SDR CALA2025052704962

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Service difficulty report · Intercostal · Boeing 757224

FAA SDR system

Difficulty date
May 22, 2025
Submitted
May 27, 2025
Operation
Air carrier
Aircraft
N12114
Make and model
Boeing 757224
Aircraft serial
27556
Aircraft time
115,280 hours, 23,973 cycles
System (JASC)
5320 · Fuselage Miscellaneous Structure
Part
Intercostal
Part number
146N5425
Part serial
NA
Condition
Corroded
Location
Zone 100
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 BILGE INTERCOSTAL STA 1420-1440 RBL14 HAS CORROSION ON LOWER FLANGE AND REQUIRES REMOVAL PER FOM. REMOVED, FABRICATED AND INSTALLED INTERCOSTAL AT STA 1420-1440 RBL14 IAW B757-200 SRM 51-40-02, 51-40-03, DWG 146N5425 REV F. INTERCOSTAL REQ REMOVED CORROSION, FOUND OUT OF LIMITS, MATERIAL LOSS .030, MATERIAL REMAINING .010, ORIGINAL THICKNESS .040. FABRICATED NEW INTERCOSTAL.