SDR HEEA0011207

Service difficulty report · Transponder · Bolkms BO105S

Difficulty date: October 6, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N7170D
Make and model: Bolkms BO105S
Aircraft serial: S840
System (JASC): 3452 · ATC Transponder System
Part: Transponder
Part number: 066106200
Condition: Inoperative
Location: Cockpit Atc
Component: KT76
Stage of operation: IN
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

TRANSPONDER INOPERATIVE. PERFORMED PRELINARY INSPECTION. REPLACED RESISTOR R441, RESISTOR R447, TRANSISTOR Q415, DIODE CR404, DIODE CR407 AND RESISTOR R429. REPAIRED. ALSO REPLACED FACEPLATE ASSY AND PHOTOCELL V301. TESTED, ADJUSTED POWER OUT, PULSE WIDTH AND FREQUENCY.BENCH CHECK GOOD.