What was found
HF NR 1 AND HF NR 2 BOTH INOP. BOTH TAKE A LONG TIME TO TUNE, THEN NO TRANSMISSIONS HEARD. GROUNDED - YES. REMOVED & REPLACED NR 1 HF ANTENNA COUPLER & NR 2 HF ANTENNA COUPLER REF AMM 23-11-61, GROUND FUNCTIONAL CK NML.
- Difficulty date
- September 4, 2018
- Submitted
- September 26, 2018
- Operation
- Air carrier
- Aircraft
- N506AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35690
- Aircraft time
- 38,938 hours, 11,965 cycles
- System (JASC)
- 2310 · HF Communications System
- Part
- Coupler
- Part number
- 8220987004
- Part serial
- 178249
- Condition
- Failed
- Location
- Hf Comm
- Part time
- 23,874 hours, 7,040 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.