Aircraft owner receives notice of inoperative transponder mode C from ATC center.

Attributes
ACN	210931
Time
Date	199204
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ztl
State Reference	GA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Route In Use	enroute airway : ztl
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 65 flight time total : 1600 flight time type : 35
ASRS Report	210931
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : less severe non adherence : far other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	faa : investigated Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

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.

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.