What was found
BOTH NR 1 AND NR 2 TRANSPONDER DISPLAYS WENT OUT DURING FLIGHT ATC REPORTED TRANSPONDER FAULTS. AIRCRAFT RETURNED TO POINT OF DEPARTURE WITHOUT INCIDENT. FAILURES TROUBLESHOT TO FAULTY TRANSPONDER CONTROL HEAD.
- Difficulty date
- November 13, 2007
- Submitted
- December 7, 2007
- Operation
- Air carrier
- Aircraft
- N702DK
- Make and model
- Beech C90A
- Aircraft serial
- LJ1259
- Aircraft time
- 4,116 hours, 4,022 cycles
- Engine
- Pwa PT6A60A
- System (JASC)
- 3452 · ATC Transponder System
- Part
- Control Head
- Part number
- 6226523008
- Part serial
- 8305
- Condition
- Faulty
- Location
- Transponder
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.