What was found
CORROSION DAMAGED ON SKIN AND DOUBLER OF NO. 1 ENG LT CORE COWL, BETWEEN NAC STA 22.50 AND NAC STA 230.5 ON AFT SIDE OF PRECOOLER DUCT.(<P>1. ACCOMPLISHED EI NO: T2025A54M-2477 REV 2. 2. JOB COMPLETED AND CONDITION CHECK NORMAL.</P>)
- Difficulty date
- November 20, 2025
- Submitted
- November 21, 2025
- Operation
- Air carrier
- Aircraft
- N249BA
- Make and model
- Boeing 747409
- Aircraft serial
- 24309
- Aircraft time
- 88,550 hours, 16,833 cycles
- System (JASC)
- 5410 · Nacelle/Pylon, Main Frame
- Part
- Cowl Door
- Condition
- Corroded
- Location
- Zone 400
- 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.