# SDR ASAA2016041416424

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2016
- Submitted: April 18, 2016
- Operation: Air carrier
- Aircraft: [N519AS](https://openairdocs.org/aircraft/N519AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36482
- Aircraft time: 27,823 hours, 8,297 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Antenna
- Condition: Failed
- Stage of operation: AP
- 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/ASAA2016041416424

## Discrepancy

CAPTAIN LOST F/D AND A/P DISENGAGED AT G/S CAPTURE.  ACFT GROUNDED.   COMPLIED WITH ALL SPECIAL MAINT PROCEDURES, NO DEFECTS NOTED FROM MAINTENANCE PROCEDURES.  DFCS FAULT REVIEW SHOWED NUMEROUS RAD ALT 1 FAULTS.  REMOVED & REPLACED, AND TESTED NR 1 RAD ALT RX AND TX ANTENNAS IAW AMM 34-33-11-400-801, TEST PASSED.  ACCOMPLISHED DFCS LAND VERIFY TEST IAW AMM 22-11-00/201, TEST PASSED.

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