# SDR CALA2024060501704

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2024
- Submitted: June 5, 2024
- Operation: Air carrier
- Aircraft: [N37253](https://openairdocs.org/aircraft/N37253), registered now
- Make and model: Boeing 737824
- Aircraft serial: 30584
- Aircraft time: 73,069 hours, 26,869 cycles
- System (JASC): [3000 · Ice/Rain Protection System](https://openairdocs.org/jasc/3000)
- Part: Pressure Switch
- Part number: 21SN4152
- Condition: Malfunctioned
- Location: Nacelleanti-Ice
- Stage of operation: UK
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2024060501704

## Discrepancy

NUMBER 2 ENGINE COWL ANTI ICE FLICKERED ON MOMENTARILY AND EXTIN G UISHED. REQUEST MEL 3003D DEFERRED PER MEL 3003D DISPATCH DESK: 33   NAME: PA DATE: 31-MAY-24- NOC  DESK: 738  NAME: JP DATE: 31-MAY-24- TOMC APPROVED *DM* REF. FIM 30-21 TASK 801 FOR TROUBLESHOOTING. 29-3021-9-9001 SLAVED IN ENG ANTI ICE VALVE IAW AMM 30-21-11 NO HELP. TS IAW FIM 30-21 TASK 801 FOUND DUCT OVER PRESSURE INOP SW. S-806 P/N 29-3021-9-9001

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