Flight crew of commuter transgressed closed taxiway G at mdt airport.

Attributes
ACN	147431
Time
Date	199005
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mdt
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 10 flight time total : 3900 flight time type : 1900
ASRS Report	147431
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility

Narrative:

ATIS contained notice that taxiway 'G' was closed. This was first flight of the morning and the first flight out of mdt (harrisburg) airport for both myself and the first officer. Our aircraft was parked facing into a building, with no txwys in sight. I located myself on the airport diagram by using our present position in relation to the buildings depicted on the diagram. While taxiing out, ground informed us that we had used 'G' taxiway. 'G' is two sides of a triangle and appears to be part of the ramp. I don't believe that there are any signs marking it. I had mislocated our parked position because the present terminal is not shown on the diagram, while the older, large hangar complex is shown. Airport diagram also shows the location of a control tower, but there are now two towers, with one being part of the new terminal complex. I think that chart needs to update their diagram to prevent any future confusion. Callback conversation with reporter revealed the following information. Neither myself or the first officer was very alert or we would not have used the wrong taxiway. Tower controller was also asleep or he would have seen us proceeding to taxiway G. I momentarily forgot the ATIS warning that taxiway G was closed.

Original NASA ASRS Text

Title: FLT CREW OF COMMUTER TRANSGRESSED CLOSED TXWY G AT MDT ARPT.

Narrative: ATIS CONTAINED NOTICE THAT TXWY 'G' WAS CLOSED. THIS WAS FIRST FLT OF THE MORNING AND THE FIRST FLT OUT OF MDT (HARRISBURG) ARPT FOR BOTH MYSELF AND THE FO. OUR ACFT WAS PARKED FACING INTO A BUILDING, WITH NO TXWYS IN SIGHT. I LOCATED MYSELF ON THE ARPT DIAGRAM BY USING OUR PRESENT POS IN RELATION TO THE BUILDINGS DEPICTED ON THE DIAGRAM. WHILE TAXIING OUT, GND INFORMED US THAT WE HAD USED 'G' TXWY. 'G' IS TWO SIDES OF A TRIANGLE AND APPEARS TO BE PART OF THE RAMP. I DON'T BELIEVE THAT THERE ARE ANY SIGNS MARKING IT. I HAD MISLOCATED OUR PARKED POS BECAUSE THE PRESENT TERMINAL IS NOT SHOWN ON THE DIAGRAM, WHILE THE OLDER, LARGE HANGAR COMPLEX IS SHOWN. ARPT DIAGRAM ALSO SHOWS THE LOCATION OF A CTL TWR, BUT THERE ARE NOW TWO TWRS, WITH ONE BEING PART OF THE NEW TERMINAL COMPLEX. I THINK THAT CHART NEEDS TO UPDATE THEIR DIAGRAM TO PREVENT ANY FUTURE CONFUSION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. NEITHER MYSELF OR THE FO WAS VERY ALERT OR WE WOULD NOT HAVE USED THE WRONG TXWY. TWR CTLR WAS ALSO ASLEEP OR HE WOULD HAVE SEEN US PROCEEDING TO TXWY G. I MOMENTARILY FORGOT THE ATIS WARNING THAT TXWY G WAS CLOSED.

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.