# SDR ASAA2016012615031

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2016
- Submitted: January 28, 2016
- Operation: Air carrier
- Aircraft: [N435AS](https://openairdocs.org/aircraft/N435AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43292
- Aircraft time: 8,877 hours, 2,919 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Module
- Part number: 233A3201302
- Part serial: F05114
- Condition: Failed
- Location: Window Heat
- Part time: 8,871 hours, 2,916 cycles
- 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/ASAA2016012615031

## Discrepancy

MASTER CAUTION AND AUXILIARY PITOT LIGHT ILLUMINATED AT CRUISE, ALT OF 320, RT FOLLOWED NO CBS NOTED, AVOID ICING CONDITITIONS NOTE DIVERTED.  ACFT GROUNDED. DIVERSION TIME - 50 MINUTES.  PERFORMED PITOT PROBE SYS TEST REF AMM 30-31-00-730-801 AND AUTO AIR DATA SENSOR HEATING OPS CHECK REF AMM 30-31-00-750-801, NO FAULTS NOTED SYS OPS GOOD, NOTE: AUX PITOT PROBE WAS REPLACED ON 01/17/2016.  AS A PRECAUTION R & R WINDOW, PITOT HEAT MODULE P5-9, REF AMM 30-41-41/401.  REPEATED THE 2 ABOVE TESTS, NO FAULTS NOTED, SYS OPS GOOD.

---
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.