What was found
Q4 CHECK - LEVEL 2 EXFOLIATION CORROSION ON VERTICAL STIFFENER AT BS 1124 BETWEEN S13L TO S17L AT APU INLET CUTOUT (INSIDE TORQUE BOX). REPLACED VERTICAL STIFFENER IAW B737 SRM 51-40-02, 51-10-02 & BOEING DRAWING 65-46579.
- Difficulty date
- June 29, 2011
- Submitted
- July 12, 2011
- Operation
- Air carrier
- Aircraft
- N418US
- Make and model
- Boeing 737401
- Aircraft serial
- 23985
- Aircraft time
- 60,443 hours, 40,460 cycles
- System (JASC)
- 5320 · Fuselage Miscellaneous Structure
- Part
- Stiffener
- Part number
- 6546579531
- 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.