Air carrier ground crew drove a tug away from an mdt without removing the ground power connection.

Attributes
ACN	188535
Time
Date	199109
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ack
State Reference	MA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : avl
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Flight Phase	ground : preflight ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 8200
ASRS Report	188535
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Airport
Air Traffic Incident	other

Narrative:

Aircraft was parked with #2 engine running and I gave signal to ramp controller to disconnect ground power unit. Not thinking, he drove off in tug with cable still connected to aircraft, pulling it out of receptacle. While in flight with aircraft pressurized, I noticed a small pressure leak coming from area of receptacle. I then made a notation in logbook discrepancy section and grounded aircraft at destination (lga).

Original NASA ASRS Text

Title: ACR GND CREW DROVE A TUG AWAY FROM AN MDT WITHOUT REMOVING THE GND PWR CONNECTION.

Narrative: ACFT WAS PARKED WITH #2 ENG RUNNING AND I GAVE SIGNAL TO RAMP CTLR TO DISCONNECT GND PWR UNIT. NOT THINKING, HE DROVE OFF IN TUG WITH CABLE STILL CONNECTED TO ACFT, PULLING IT OUT OF RECEPTACLE. WHILE IN FLT WITH ACFT PRESSURIZED, I NOTICED A SMALL PRESSURE LEAK COMING FROM AREA OF RECEPTACLE. I THEN MADE A NOTATION IN LOGBOOK DISCREPANCY SECTION AND GNDED ACFT AT DEST (LGA).

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.