Air carrier X non adherence with ATC clearance. Failed to comply with DME turn restr on SID.

Attributes
ACN	294360
Time
Date	199501
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mdw
State Reference	IL
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : dfw
Operator	general aviation : corporate
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other departure sid : sid enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 70 flight time total : 12500 flight time type : 5000
ASRS Report	294360
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 270 flight time total : 6500 flight time type : 1000
ASRS Report	294475
Events
Anomaly	non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X departed runway 22L with initial turn right to 270 degrees. At 2.6 DME (imdw) after takeoff we were given right turn 060 degrees, contact departure -- chi departure. When contacted, gave right to 090 degrees then 110 degrees. At this point controller said he showed aircraft to be almost 1 mi north of 4 DME arc. We replied that we would increase bank angle. No further conversation. Mdw SID states maintain 4 DME (within) of mdw on initial turn on takeoff. Supplemental information from acn 294475: departed mdw. Midway departure stipulates turn within a specified distance (I think 4 mi). I heard turn to 010 degrees. I made my turn as I heard it. ATC later called to tell me to tighten the turn. My captain informed me that the correct heading was 110 degrees. I tightened the turn but the air traffic controller told me that I had already violated the departure. My captain explained to me to always query any turn not somewhere near due east, due to ord traffic. I wish departure charts could have explanations explaining close-in turns. This would help cement the turn in my mind.

Original NASA ASRS Text

Title: ACR X NON ADHERENCE WITH ATC CLRNC. FAILED TO COMPLY WITH DME TURN RESTR ON SID.

Narrative: ACR X DEPARTED RWY 22L WITH INITIAL TURN R TO 270 DEGS. AT 2.6 DME (IMDW) AFTER TKOF WE WERE GIVEN R TURN 060 DEGS, CONTACT DEP -- CHI DEP. WHEN CONTACTED, GAVE R TO 090 DEGS THEN 110 DEGS. AT THIS POINT CTLR SAID HE SHOWED ACFT TO BE ALMOST 1 MI N OF 4 DME ARC. WE REPLIED THAT WE WOULD INCREASE BANK ANGLE. NO FURTHER CONVERSATION. MDW SID STATES MAINTAIN 4 DME (WITHIN) OF MDW ON INITIAL TURN ON TKOF. SUPPLEMENTAL INFO FROM ACN 294475: DEPARTED MDW. MIDWAY DEP STIPULATES TURN WITHIN A SPECIFIED DISTANCE (I THINK 4 MI). I HEARD TURN TO 010 DEGS. I MADE MY TURN AS I HEARD IT. ATC LATER CALLED TO TELL ME TO TIGHTEN THE TURN. MY CAPT INFORMED ME THAT THE CORRECT HDG WAS 110 DEGS. I TIGHTENED THE TURN BUT THE AIR TFC CTLR TOLD ME THAT I HAD ALREADY VIOLATED THE DEP. MY CAPT EXPLAINED TO ME TO ALWAYS QUERY ANY TURN NOT SOMEWHERE NEAR DUE E, DUE TO ORD TFC. I WISH DEP CHARTS COULD HAVE EXPLANATIONS EXPLAINING CLOSE-IN TURNS. THIS WOULD HELP CEMENT THE TURN IN MY MIND.

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.