# SDR HEEA955566

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N5421E
- Make and model: Bolkms BO105S
- Aircraft serial: S806
- System (JASC): [3452 · ATC Transponder System](https://openairdocs.org/jasc/3452)
- Part: Transceiver
- Part number: 066106200
- Condition: Defective
- Location: Cockpit
- Component: KT76
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEEA955566

## Discrepancy

TRANSPONDER WILL NOT IDENT. RESOLDERED COLD SOLDER JOINT ON DIODE CR416.  REPAIRED RECEIVE PROBLEM.  FOUND -10 VOLTS ON -6 VOLT LINE.  TROUBLESHOT AND FOUND C409 CAPACITOR DEFECTIVE.  REPLACED CAPACITOR TO REPAIR -6V LINE.  COMPLETED FUNCTION CHECK.  ALSO INSTALLED Q415 HEATSINK AND REPLACED DETERIORATED RESISTOR R477.  BENCH CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.