- Difficulty date
- June 7, 2021
- Submitted
- July 13, 2021
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41702
- Aircraft time
- 25,841 hours, 8,353 cycles
- Part
- Coupler
- Part number
- 8220987004
- Part serial
- 182816
- Condition
- Inoperative
- Location
- Nr 1 Hf Comms
- Part time
- 25,556 hours, 8,176 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.
What was found
HF#1 INOP. GROUNDED - YES. REPLACED #1 HF COUPLER PER B737-900 AMM 23-11-61/401. REPLACED #2 HF COUPLER IAW AMM 23-11-61. OP CHK FAILED RTP 1 AND 2 STILL SHOW "INOP" FOR HF1. REACTIVATED HF1 IAW AMM 23-12-41. HF1 OP CHECK GOOD IAW 23-11-61. ETOPS GROUND VERIFICATION SUCCESSFUL. HF 2 OP CHECK SUCCESSFUL IAW AMM 23-11-61.