# SDR REXA2013012100169

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2013
- Submitted: January 22, 2013
- Operation: Air carrier
- Aircraft: [N8964E](https://openairdocs.org/aircraft/N8964E), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7964
- Aircraft time: 18,757 hours, 16,247 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Uplock
- Condition: Malfunctioned
- Location: Nlg
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/REXA2013012100169

## Discrepancy

ON FLIGHT 4236 (CMH - MSP) A LOUD CLACKING NOISE AFTER TAKEOFF.  WHEN GEAR WAS SELECTED UP A LOUD REPETITIVE GRINDING/THUMPING NOISE WAS HEARD FROM THE NLG AREA.  THE NLG SHOWED IN TRANSIT AND MLG SHOWED UP.  THE NLG DIDN'T SHOW UP AND LOCKED UNTIL 6 MINUTES AFTER THEY WERE SELECTED UP.  TROUBLESHOOT CLACKING NOISE BY SERVICING NLG STRUT IAW AMM 12-12-32.  REMOVED AND REPLACED NLG UPLOCK ASSY IAW AMM 32-33-05.  RIG AND OPS CHECKED NLG RETRACTION AND EXTENSION UPLOCK.  OPS CHECK NO DEFECTS NOTED AND OK FOR SERVICE.  SERVICED NLG WITH NEW OIL AND NITROGEN IAW CRJ AMM 12-12-32.  AIRCRAFT WAS ON GROUND AT TIME OF SERVICING.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.