What was found
VERTICAL STIFFENER CRACKED BS 540, RBL 24 UPPER SECTION. REPLACED THE LBL 24 AND RBL 24 STIFFENERS AT BS 540 IAW SRM 51-40-02 IAW DRAWINGS. FABRICATION DEVIATION IAW EA 25-157-03419.
- Difficulty date
- December 5, 2025
- Submitted
- December 29, 2025
- Operation
- Air carrier
- Aircraft
- N470WN
- Make and model
- Boeing 7377H4
- Aircraft serial
- 33860
- Aircraft time
- 71,125 hours, 42,675 cycles
- System (JASC)
- 5320 · Fuselage Miscellaneous Structure
- Part
- Stiffener
- Condition
- Cracked
- 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.