What was found
R2 MOPSILL HAS MULTIPLE AREAS OF CORROSION. GROUNDED - YES. REMOVED & REPLACED R2 MOP SILL CHORD IAW BOEING SRM 51-40-02.
- 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)
- 5310 · Fuselage Main, Structure
- Part
- Sill Drain
- Part number
- 147A8540U30
- 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.