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  Updated NOV/2019    WE ALSO PROVIDE PRE-WIRED CUSTOM EASY INSTALL ADS-B KITS AND 24 MONTH TRANSPONDER RECERTS WITH LOG ENTRY
 

 


THE FUNCTIONAL TESTING AND EVALUATIONS IN THIS SECTION MAY BE CONDUCTED BY A PRIVATE PILOT IN ACCORDANCE WITH MANUFACTURER’S OPERATING PROCEDURES IF THE TRANSPONDER IS NOT REMOVED.

CLICK HERE  TO VIEW FAR PART 43 APPENDIX A 

THIS SECTION DEALS WITH THE TRANSPONDER ITSELF AND IS WHERE YOU SHOULD START EVEN IF YOU SUSPECT AN AIRFRAME RELATED ISSUE OR HAVE MODE C (ALTITUDE REPORTING) PROBLEMS.


INTERACTIVE PARTICIPATION IS IN BLUE BOLD TEXT.  COMMENTS OR ADVICE IS IN BLACK TEXT.  CLICK ON ANY BUTTONS THAT MAY APPLY AND IGNORE THE REST.

SOME GENERIC TERMS WE USE MAY NOT BE RELEVANT.  FOR EXAMPLE TRANSPONDERS WITH ELECTRONIC DISPLAYS DO NOT HAVE REPLY LAMPS AND MAY HAVE BUTTONS RATHER THAN KNOBS.

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WE'LL ASSUME YOU HAVE OBSERVED NO OBVIOUS FAULTS SUCH AS PHYSICAL DAMAGE, MISSING ANTENNA OR OTHER PROBLEMS THAT DEVELOPED AT THE SAME EXACT TIME.


BACKGROUND DETAILS
 

CLICK HERE  HAS THERE BEEN ANY MAINTENANCE, UPGRADES OR CHANGES TO YOUR AIRCRAFT THAT CORRESPOND WITH YOUR TRANSPONDER'S FAILURE?

CLICK HERE  WHEN WAS THE LAST TIME YOUR TRANSPONDER RECEIVED IT'S FAR 91.413 24 MONTH CERTIFICATION?

CLICK HERE  WAS THIS A INTERMITTENT, PARTIAL OR COMPLETE FAILURE?

CLICK HERE  HAS THIS TRANSPONDER EVER FAILED BEFORE, BEEN REPAIRED, AND FAILED AGAIN IN THE EXACT SAME WAY?


LET'S ACCESS YOUR ABILITY TO PERFORM MAINTENANCE ON YOUR TRANSPONDER
 

CLICK HERE  IF YOU ARE AN A&P MECHANIC OR APPROPRIATELY RATED REPAIRMAN

CLICK HERE  IF YOU ARE A PRIVATE PILOT OR THE AIRCRAFT'S OWNER.

CLICK HERE  DO YOU NEED HELP IN SELECTING OR FINDING A LICENSED MECHANIC?


WHAT DO YOU REMEMBER FROM YOUR LAST FLIGHT(s)?
CLICK HERE  DID THE FAILURE OCCUR DURING AN IFR FLIGHT?        

CLICK HERE  DID YOUR TRANSPONDER REPORT THE WRONG CODE?  EXAMPLE: 2200 RATHER THAN 1200.

CLICK HERE  DID YOUR REPLY LAMP SEEM TO FLASH AS IT NORMALLY DOES?

CLICK HERE  DID YOU EXPERIENCED INTERMITTENT BEHAVIOR SUCH AS ONE CONTROLLER SEES YOU FINE BUT THE NEXT ONE LOOSES YOU WHEN YOU ARE HANDED OFF?

CLICK HERE  IF ALTITUDE REPORTING (MODE C) IS INOP OR IN ERROR.


AIRFRAME FUNCTIONAL TESTS AND EVALUATION

CLICK HERE   INSPECT BELLY MOUNTED ANTENNA

CLICK HERE   TEST ADJACENT RADIO/BULBS/SYSTEMS FOR OPERATION?

CLICK HERE   DO THE INTERNAL "PILOT LIGHTS" COME ON WHEN YOU SELECT NIGHT LIGHTING?


THE MOST IMPORTANT ASPECT HERE IS UNDERSTANDING THE BEHAVIOR OF YOUR REPLY LAMP (OR ICON) ESPECIALLY WHEN YOU MANUALLY SELECT THE TEST FUNCTION.  

WHEN YOU SELECT TEST, YOU ARE ACTUALLY INJECTING A SIGNAL THAT MIMICS AN ACTUAL ATC INTERROGATION DIRECTLY INTO THE RECEIVER, “TRICKING” IT INTO TRIGGERING A REPLY AFTER PASSING THROUGH THE DECODING, ENCODING AND MOST OR THE REPLY CIRCUITRY.  THE REPLY LAMP WILL ILLUMINATE ONLY IF ALL (OR MOST) OF THE CIRCUITS ARE FUNCTIONING.

A SUCCESSFUL TEST DOES NOT MEAN YOU ARE SENDING THE PROPER CODES, ON THE CORRECT FREQUENCY OR HAVE ANTENNA ISSUES.  HOWEVER IT GENERALLY INDICATES AN OTHERWISE "HEALTHY" TRANSPONDER.


TRANSPONDER FUNCTIONAL TESTS AND EVALUATION

THE BEHAVIOR OF YOUR REPLY LAMP IS DIRECTLY CONNECTED IN SEVERAL WAYS TO YOUR TRANSPONDER'S HEALTH.  IT COULD BE THE KEY IN YOUR DECISION TO SEND THE UNIT IN FOR REPAIR OR TO HAVE THE WIRING AND ANTENNA INSPECTED AND REPAIRED LOCALLY.

CLICK HERE  IF YOUR TRANSPONDER HAS AN ELECTRONIC DISPLAY

PERFORM THE FOLLOWING IN THE AIRCRAFT.  TURN REPLY LAMP DIMMER FULLY CLOCKWISE (IF IT HAS ONE).  TURN ON BOTH BATTERY AND AVIONICS MASTERS.  DO NOT START ENGINE.  BE PREPARED TO OBSERVE AND RECORD WHAT YOU FIND IN STEPS 1 THROUGH 5 ( YOU'LL HAVE TO PULL STEP 6 FROM MEMORY).  NOW TURN ON TRANSPONDER IN THE "ALT" MODE AND OBSERVE:

1. REPLY LAMP COMES ON DURING WARM-UP. (MOST UNITS).
2. A HIGH PITCH WHINE MIGHT BE HEARD IF YOU LISTEN VERY CLOSELY.
3. REPLY LAMP GOES OFF IN 15-30 SECONDS. (MOST UNITS).
4. REPLY LAMP WILL COME ON IF UNIT IS PLACED IN TEST MODE.
5. REPLY LAMP WILL COME ON FOR ABOUT 15 SECONDS IF IDENT BUTTON IS PRESSED. (DON'T PRESS IDENT IF YOU SEE ANY REPLY LAMP ACTIVITY).
6. REPLY LAMP  DID FLASH DURING FLIGHT.

CLICK HERE  IF NONE OF THE ABOVE OCCURS.

CLICK HERE  IF ALL OF THE ABOVE OCCURS.

CLICK HERE  DO YOU HEAR A HIGH PITCHED WHINE? (MOST TRANSPONDERS).

CLICK HERE  IF REPLY LAMP DOES NOT COME ON IN FLIGHT.

CLICK HERE  IF REPLY LAMP DOES NOT COME ON WHEN UNIT IS IN TEST MODE.

CLICK HERE  IF REPLY LAMP IS ALWAYS ON AND DOES NOT FLASH.

 

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