# SDR ASAA2021080335620

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2021
- Submitted: August 5, 2021
- Operation: Air carrier
- Aircraft: [N919AK](https://openairdocs.org/aircraft/N919AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44087
- Aircraft time: 709 hours, 337 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Sensor
- Part number: BCREFD00400
- Condition: Faulted
- Location: Cockpit Window
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021080335620

## Discrepancy

LEFT SIDE WINDSHIELD HAD OVERHEAT, TURNED OFF PER QRH FOR 5 MINS LIGHT DID NOT COME BACK ON WHEN TURNED BACK ON. GROUNDED - YES. PERFORMED LEFT SIDE WINDOW WHCU OPS TESTS. NO FAULTS FOUND. WHCU BITE SHOWS #1 SENSOR FAIL SEVERAL TIMES. REF B737-9 AMM 30-41-11. DUE TO HISTORY SWAPPED TO SPARE SENSOR PER AMM 30-41-00-420-801. OPENED /CLOSED 1 CB. PERFORMED WHCU OPS TEST. NO FAULTS FOUND. REF B737-9 WDM 30-41-12 PG 3.

---
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.