# SDR ASAA2022120841095

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2022
- Submitted: December 12, 2022
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 51,913 hours, 15,251 cycles
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022120841095

## Discrepancy

AFTER TAKEOFF HUD DISPLAYED "TAILSTRIKE" AND DISPLAYED "PWS FAIL" BOTH DISPLAYED AT THE SAME TIME AND CLEARED THEMSELVES AT THE SAME TIME DURING CLIMB. GROUNDED - YES. PERFORMED WEATHER RADAR (WXR) SYSTEM OPERATIONAL TEST IAW B737-800 AMM 34-43-00-710-002-001, NO FAULTS FOUND. ACCOMPLISHED GRD PROX WARN SYS OPS TEST, NO FAULTS REF AMM 34-36-00-710-804-002. ACCOMPLISHED HGS SYS TEST, SENSORS DATA TEST, CDS/GPWS DATA, NO INACTIVE FAULTS AND ALL OTHER WARN WAS NORMAL. HGS SYS TEST, OPS NML REF AMM 34-36-00/500.

---
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.