What was found
AIRCRAFT IN BASE MAINTENANCE: MAIN CABIN FLOOR SUPPORT STRUCTURE HAS A CRACK AT RADIUS STA 540 RBL 3. REMOVED AND REPLACED MAIN CABIN FLOOR SUPPORT STRUCTURE (BREAK ASSEMBLY FROM STA 540 FROM RBL 0 TO RBL 25. PER B737-NG SRM 51-40-02.
- Difficulty date
- May 20, 2025
- Submitted
- May 29, 2025
- Operation
- Air carrier
- Aircraft
- N839NN
- Make and model
- Boeing 737823
- Aircraft serial
- 29557
- Aircraft time
- 43,945 hours, 18,746 cycles
- System (JASC)
- 5315 · Fuselage Main, Floor Beam
- Part
- Floorbeam
- Part number
- 143A54036SD
- Condition
- Cracked
- Location
- Zone 200
- 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.