What was found
UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND CORROSION ON BS 947 FLOORBEAM UPPER CAP AT ALL 4 LAV MOUNT FITTING LOCATIONS. GROUNDED - YES. REPAIRED FLOORBEAM 947.5 LBL-59-RBL-59 IAW SRM 53-70-51-2R-5 REPAIR 5, EA 900ER-53EA-30665.
- Difficulty date
- August 14, 2026
- Submitted
- September 22, 2026
- Operation
- Air carrier
- Aircraft
- N474AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40715
- Aircraft time
- 41,075 hours, 12,860 cycles
- System (JASC)
- 5315 · Fuselage Main, Floor Beam
- Part
- Floorbeam
- Part number
- 147A350423
- Condition
- Corroded
- 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.