What was found
AIRCRAFT WAS GROUNDED. FLIGHT DIVERTED TO MEM DUE TO FLAPPING NOISE AND SLIGHT AIRFRAME VIBRATION, EMERGENCY WAS NOT DECLARED. REPLACED LT PACK TEMPERATURE CONTROL VALVE DUCT, IAW AMM 21-51-10. LEAK AND OPERATIONS CHECK GOOD.
- Difficulty date
- January 5, 2021
- Submitted
- January 13, 2021
- Operation
- Air carrier
- Aircraft
- N989NN
- Make and model
- Boeing 737823
- Aircraft serial
- 33338
- Aircraft time
- 14,259 hours, 5,750 cycles
- System (JASC)
- 2120 · Air Distribution System
- Part
- Duct
- Part number
- 213A121192
- Condition
- Blown
- Location
- Lt A/C Pack
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- E
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.