# SDR ASAA2019050529253

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2019
- Submitted: May 7, 2019
- Operation: Air carrier
- Aircraft: [N494AS](https://openairdocs.org/aircraft/N494AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41729
- Aircraft time: 13,017 hours, 4,211 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Switch
- Part number: MS2452423
- Condition: Failed
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019050529253

## Discrepancy

CA'S FWD WINDSHIELD HEAT (L1) OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. FOUND PRIMARY L-1 WINDOW SENSOR OPEN. PLACED SWITCH S1078 TO SPARE POSITION. SYS OPS CKS NML PER AMM 30-41-00.

---
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.