What was found
HF/ SAT 1 XFER SWITCH UNABLE TO SELECT SAT 1. SWITCH WILL NOT LATCH DOWN IN "SAT". GROUNDED - YES. REPLACED HF/SAT TRANSFER PANEL REF AMM 23-15-00-400-804 VOICE TEST GOOD. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.
- Difficulty date
- December 22, 2019
- Submitted
- December 24, 2019
- Operation
- Air carrier
- Aircraft
- N478AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44105
- Aircraft time
- 17,680 hours, 5,732 cycles
- System (JASC)
- 2300 · Communications System
- Part
- Switch
- Part number
- G716401
- Part serial
- 462
- Condition
- Failed
- Location
- Hf/Satcom
- Part time
- 17,677 hours, 5,727 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.