Local controller described loss of separation event when first aircraft failed to follow assigned he...

Attributes
ACN	841042
Time
Date	200906
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-31 Navajo/Chieftan/Mojave/T1040
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Non Radar 1 Air Traffic Control Time Certified In Pos 1 (mon) 2
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance
Miss Distance	Horizontal 12000

Narrative:

I was working local control and a PA31; called for IFR departure. I issued him a heading of 230 and a takeoff clearance off of runway which he read back correctly. The PA31 took off and a G3; called ready for an IFR departure and a request to change his destination. I issued him a taxi into position and hold instruction then issued the clearance with the same route but the change in destination. I gave him a 275 heading and cleared him for takeoff. I then switched the PA31 to departure. I then issued the G3 traffic on the PA31. The PA31 never turned to the 230 heading as issued and read back. He told center that he was given runway heading; but after checking the tapes; he was inaccurate. The reason for the loss of separation is that the pilot did not follow instructions. A pilot deviation was filed.

Original NASA ASRS Text

Title: Local Controller described loss of separation event when first aircraft failed to follow assigned heading on departure and was overtaken by a second aircraft.

Narrative: I was working local control and a PA31; called for IFR departure. I issued him a heading of 230 and a takeoff clearance off of Runway which he read back correctly. The PA31 took off and a G3; called ready for an IFR departure and a request to change his destination. I issued him a taxi into position and hold instruction then issued the clearance with the same route but the change in destination. I gave him a 275 heading and cleared him for takeoff. I then switched the PA31 to departure. I then issued the G3 traffic on the PA31. The PA31 never turned to the 230 heading as issued and read back. He told Center that he was given runway heading; but after checking the tapes; he was inaccurate. The reason for the loss of separation is that the pilot did not follow instructions. A pilot deviation was filed.

Data retrieved from NASA's ASRS site as of April 2012 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.

Local controller described loss of separation event when first aircraft failed to follow assigned heading on departure and was overtaken by a second aircraft.