# SDR 9WGA4112017060202

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2017
- Submitted: June 3, 2017
- Operation: Air carrier
- Aircraft: [N411SN](https://openairdocs.org/aircraft/N411SN), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48411
- Aircraft time: 71,367 hours, 14,000 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Pitot Tube
- Condition: Blocked
- Stage of operation: CL
- How discovered: O
- Nature of condition: C
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9WGA4112017060202

## Discrepancy

SECOND AIR TURN BACK, CADC NR 2 FAILED ON DEPARTURE. TROUBLESHOT SYSTEM AND FOUND A PITOT TUBE BLOCKAGE. REMOVED AND CLEANED PITOT TUBE DRAIN IAW AMM 34-11-01 RETURNED AIRCRAFT TO SERVICE..

---
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.