- Difficulty date
- March 25, 2022
- Submitted
- April 26, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737
- Aircraft serial
- 35186
- Aircraft time
- 53,774 hours, 15,962 cycles
- Part
- None
- Part number
- 8220987004
- Part serial
- 173406
- Condition
- Inoperative
- Location
- Vertical Fin
- Part time
- 40,574 hours, 11,730 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.
What was found
HF#1 RECEPTION WEAK AND UNREADABLE ON ALL FREQUENCIES. TRANSMISSIONS ARE LOAD AND CLEAR. GROUNDED - YES. REPLACED HF COUPLER #1 OPS CHECKS REQUIRED REF B737-800 AMM TASK 23-11-61. PERFORMED INSTALLATION TEST OF # 1 HF COUPLER ANTENNA, REF AMM 23-11-61-400-801. OPS CHECK GOOD.