# SDR CA991027068

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 30, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Fokker F.28 MK 1000
- Registry model: [Fokker F.28 MK 1000](https://openairdocs.org/model/fokker-f-28-mk-1000) (OpenAirDocs)
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Switch
- Condition: Failed
- Location: Anti Icing Sys
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA991027068

## Discrepancy

(CAN) ON TAKEOFF, DUCT LIGHT CAME ON WITH SELECTION OF THE AIRFOIL ANTI-ICE. THE WING ANTI-ICE PRIMARY OVERHEAT LIGHT CAME ON AND THE SHUT-OFF VALVE BEGAN TO CYCLE.  AIRCRAFT RETURNED TO BLOCKS.   REPLACED DUCT LEAK SENSING SWITCH.  TEST FLIGHT INDICATED SERV HOWEVER THE PRIMARY OVERHEAT STILL ON.  REPLACED THIRD LT INBOARD LEADING EDGE.

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