# SDR FDEA201312273045

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2013
- Submitted: December 31, 2013
- Operation: Air carrier
- Aircraft: [N528FE](https://openairdocs.org/aircraft/N528FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48623
- Aircraft time: 52,252 hours, 9,803 cycles
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: B-Nut
- Condition: Loose
- Location: Anti Ice Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201312273045

## Discrepancy

LEVEL 1 ANTI-ICE SENSOR FAILED ONE AND A HALF HOURS INTO FLIGHT AT FL 370.  NR 1 INTERMEDIATE PRESSURE SENSORS PI1 & PI1B ARE FAULTED & READINGS ARE OUT IN PSC 1 & 2 SENSOR READOUTS.   PRESSURE TESTED PI LINES & FOUND B-NUT LOOSE AT UNION BETWEEN PRESSURE PILOT VALVE & PRV PRESSURE CLOSED SWITCH.  TIGHTENED NUT, LEAK CHECKED GOOD.  TROUBLESHOT IAW FIM 30-12-03-00 & 36-11-01, NO DEFECTS NOTED.  R & R BOTH PI SENSORS IAW AMM 36-11-05-4.  FOUND PM SENSORS CONTAMINATED WITH WATER.  BLEW OUT LINES & FOR PRECAUTIONARY CHANGED BOTH PM SENSORS.

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