# SDR AALA202002049001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2020
- Submitted: February 4, 2020
- Operation: Air carrier
- Aircraft: [N804NN](https://openairdocs.org/aircraft/N804NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29567
- Aircraft time: 33,137 hours, 13,235 cycles
- System (JASC): [2397 · Communications System Wiring](https://openairdocs.org/jasc/2397)
- Part: Coupler
- Part number: COU5271
- Part serial: 167409
- Condition: Faulty
- Location: Hf Antenna
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202002049001

## Discrepancy

AIRCRAFT NOT GROUNDED: UNABLE TO TRANSMIT ON HF2 AND ATTEMPTING TO TRANSMIT ON HF1 AND ARINC HAD DIFFICULTY HEARING  US. BOTH HF RADIOS NEED TO BE CHECKED.***SUPPLEMENTAL ACTION SECT. 4 AND 5: REMOVED AND REPLACED HF#1 AND HF#2 ANTENNA. COUPLERS IAW AMM 23-11-61.ALSO SEE AALA202001249006***(CLOSED)

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