Narrative:

Missed turn to 295 degrees after departing runway 34 at hpn. Controller had to have us turn tightly since we were mistakenly on a 340 degree runway heading. Controller was very busy. We thought we heard and read back stay on runway heading clearance and I (captain) was having headset problems. Intermittent.

Google
 

Original NASA ASRS Text

Title: DC9 MISSED TURN ON SID FROM HPN.

Narrative: MISSED TURN TO 295 DEGS AFTER DEPARTING RWY 34 AT HPN. CTLR HAD TO HAVE US TURN TIGHTLY SINCE WE WERE MISTAKENLY ON A 340 DEG RWY HDG. CTLR WAS VERY BUSY. WE THOUGHT WE HEARD AND READ BACK STAY ON RWY HDG CLRNC AND I (CAPT) WAS HAVING HEADSET PROBS. INTERMITTENT.

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.