Narrative:

Mode C transponder had acted up on apr/xx/92. The problem was checked and no apparent cause was found. On may/xx/92 and may/xx/92 on trip to chesapeake, va, from base I28, the mode C portion of transponder was erratic and mode C squawk was ceased. The return trip included deviations for WX through greensboro, nc, and bristol, tn (tri). The flight was conducted under an IFR flight plan. No problems arose and conditions were predominantly VFR. On may/xx/92, the transponder mode C portion was checked by maintenance at OI3. The mode C connection was loose and the problem corrected. Mode C checked out by hts approach and found operative. A FAA notice of non-operation of mode C for the apr/xx/92 flight was received by the aircraft owner on may/xx/92 from ZTL. The problem is corrected now and the mode C is operational and within tolerance.

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Original NASA ASRS Text

Title: ACFT OWNER RECEIVES NOTICE OF INOP TRANSPONDER MODE C FROM ATC CTR.

Narrative: MODE C TRANSPONDER HAD ACTED UP ON APR/XX/92. THE PROBLEM WAS CHKED AND NO APPARENT CAUSE WAS FOUND. ON MAY/XX/92 AND MAY/XX/92 ON TRIP TO CHESAPEAKE, VA, FROM BASE I28, THE MODE C PORTION OF TRANSPONDER WAS ERRATIC AND MODE C SQUAWK WAS CEASED. THE RETURN TRIP INCLUDED DEVS FOR WX THROUGH GREENSBORO, NC, AND BRISTOL, TN (TRI). THE FLT WAS CONDUCTED UNDER AN IFR FLT PLAN. NO PROBLEMS AROSE AND CONDITIONS WERE PREDOMINANTLY VFR. ON MAY/XX/92, THE TRANSPONDER MODE C PORTION WAS CHKED BY MAINT AT OI3. THE MODE C CONNECTION WAS LOOSE AND THE PROBLEM CORRECTED. MODE C CHKED OUT BY HTS APCH AND FOUND OPERATIVE. A FAA NOTICE OF NON-OP OF MODE C FOR THE APR/XX/92 FLT WAS RECEIVED BY THE ACFT OWNER ON MAY/XX/92 FROM ZTL. THE PROBLEM IS CORRECTED NOW AND THE MODE C IS OPERATIONAL AND WITHIN TOLERANCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.