What was found
PRECAUTIONARY REPLACE BOTH HF COUPLERS. GROUNDED - YES. REMOVED AND REPLACED #1 HF ANTENNA COUPLER, INSTALLATION TEST OK, REF B737-800 AMM 23-11-61-400-801. E. REPLACED #2 HF COUPLER REF MM 23-11-61-400-801. OPS NORMAL.
- Difficulty date
- June 6, 2021
- Submitted
- June 7, 2021
- Operation
- Air carrier
- Aircraft
- N577AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35186
- Aircraft time
- 50,877 hours, 15,140 cycles
- System (JASC)
- 2310 · HF Communications System
- Part
- Coupler
- Part number
- 8220987004
- Part serial
- 177726
- Condition
- Inoperative
- Location
- Hf Antenna
- Part time
- 27,327 hours, 8,781 cycles
- Stage of operation
- IN
- 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.