What was found
HF NR 1 TRANSMIT FUNCTION INOPERABLE, BUT RECEIVED SELCAL ON BOTH HF NR 1 AND HF NR 2, ALSO CANNOT HEAR ANY COMMUNICATIONS ON HF NR 1. GROUNDED-YES. REPLACED NR 1 HF ANTENNA COUPLER, PER B737-800 AMM 23-11-61. OPERATIONS CHECK GOOD.
- Difficulty date
- January 2, 2021
- Submitted
- January 5, 2021
- Operation
- Air carrier
- Aircraft
- N557AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35176
- Aircraft time
- 54,190 hours, 15,826 cycles
- System (JASC)
- 2397 · Communications System Wiring
- Part
- Coupler
- Part number
- 8220987004
- Part serial
- 154650
- Condition
- Failed
- Location
- Hf Antenna
- Part time
- 46,091 hours, 13,466 cycles
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.