IFR into TCA by small transport without transponder mode C in operation.

Attributes
ACN	123882
Time
Date	198909
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bed
State Reference	MA
Altitude	agl bound lower : 0 agl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bos tower : bed
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 70 flight time total : 5000 flight time type : 3500
ASRS Report	123882
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical non adherence : far other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Immediately after departure, tower turned us over to bos departure. The controller questioned negative mode C. I replied to the effect we had had a few complaints, intermittent. She responded to the effect 'that's the same as no mode C. You should have had a waiver.' the mode C unit has been removed from the aircraft for inspection/repair.

Original NASA ASRS Text

Title: IFR INTO TCA BY SMT WITHOUT TRANSPONDER MODE C IN OPERATION.

Narrative: IMMEDIATELY AFTER DEP, TWR TURNED US OVER TO BOS DEP. THE CTLR QUESTIONED NEGATIVE MODE C. I REPLIED TO THE EFFECT WE HAD HAD A FEW COMPLAINTS, INTERMITTENT. SHE RESPONDED TO THE EFFECT 'THAT'S THE SAME AS NO MODE C. YOU SHOULD HAVE HAD A WAIVER.' THE MODE C UNIT HAS BEEN REMOVED FROM THE ACFT FOR INSPECTION/REPAIR.

Data retrieved from NASA's ASRS site as of August 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.