What was found
LEFT WING NR 4 SLAT INBD TRACK DRIVE MOTOR SPROCKET TEETH PITTED. REMOVED AND REPLACED THE NR 4 SLAT INBD ROTARY ACTUATOR SPROCKET IAW AMM 57-81-18-4. OPS CHECKED GOOD IAW AMM 27-81-18-4.
- Difficulty date
- October 9, 2019
- Submitted
- October 11, 2019
- Operation
- Air carrier
- Aircraft
- N936FD
- Make and model
- Boeing 7572T7
- Aircraft serial
- 23293
- Aircraft time
- 91,441 hours, 34,128 cycles
- System (JASC)
- 2780 · Leading Edge Slat Control System
- Part
- Sprocket
- Part number
- 251N50896WE
- Condition
- Corroded
- Location
- Lt Wing Slat
- 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.