GA small aircraft unauthorized taxi runway crossing at pdk.

Attributes
ACN	190072
Time
Date	199109
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pdk airport : pdx
State Reference	GA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	ground : holding ground other : taxi
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 2800 flight time type : 50
ASRS Report	190072
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Airport was extremely busy, wind from northwest, so parallel runway 2L was not in use, parallel runway 2R reserved for jets (long runway), runway 34 used for all other aircraft. We were told to 'cross 2L hold short of 2R' (we did that). After about 1 min, we were told to 'cross 2R, hold short of 34'. In order to comply, we had 2 choices: 1) go straight, or 2) turn right. Either direction would have allowed us to cross 2R. We went straight. As shown by diagram below, ATC (ground) wanted us to turn right, cross 2R, and hold at departure end of 34. Ground actually said, 'cross 2R' which we did and planned to hold short of 34 on east side of 34 (there was an aircraft holding over there already). Obviously, under the busy conditions, we misunderstood, and crossed active runway 34 without a clearance. I believe a better instruction would have been 'turn right on taxiway bravo, cross 2R, hold short of 34'. It was another breakdown in communications, made worse by the extremely busy traffic conditions. (I had a discussion with the tower supervisor upon returning from my 1.5 hour instruction flight.)

Original NASA ASRS Text

Title: GA SMA UNAUTHORIZED TAXI RWY XING AT PDK.

Narrative: ARPT WAS EXTREMELY BUSY, WIND FROM NW, SO PARALLEL RWY 2L WAS NOT IN USE, PARALLEL RWY 2R RESERVED FOR JETS (LONG RWY), RWY 34 USED FOR ALL OTHER ACFT. WE WERE TOLD TO 'CROSS 2L HOLD SHORT OF 2R' (WE DID THAT). AFTER ABOUT 1 MIN, WE WERE TOLD TO 'CROSS 2R, HOLD SHORT OF 34'. IN ORDER TO COMPLY, WE HAD 2 CHOICES: 1) GO STRAIGHT, OR 2) TURN R. EITHER DIRECTION WOULD HAVE ALLOWED US TO CROSS 2R. WE WENT STRAIGHT. AS SHOWN BY DIAGRAM BELOW, ATC (GND) WANTED US TO TURN R, CROSS 2R, AND HOLD AT DEP END OF 34. GND ACTUALLY SAID, 'CROSS 2R' WHICH WE DID AND PLANNED TO HOLD SHORT OF 34 ON E SIDE OF 34 (THERE WAS AN ACFT HOLDING OVER THERE ALREADY). OBVIOUSLY, UNDER THE BUSY CONDITIONS, WE MISUNDERSTOOD, AND CROSSED ACTIVE RWY 34 WITHOUT A CLRNC. I BELIEVE A BETTER INSTRUCTION WOULD HAVE BEEN 'TURN R ON TAXIWAY BRAVO, CROSS 2R, HOLD SHORT OF 34'. IT WAS ANOTHER BREAKDOWN IN COMS, MADE WORSE BY THE EXTREMELY BUSY TFC CONDITIONS. (I HAD A DISCUSSION WITH THE TWR SUPVR UPON RETURNING FROM MY 1.5 HR INSTRUCTION FLT.)

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.