A B737-300 flight crew accepts a clearance and flies the wrong heading out of bwi, md.

Attributes
ACN	526796
Time
Date	200110
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bwi.airport
State Reference	MD
Altitude	msl single value : 12000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : bwi.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : bwi.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8500 flight time type : 5000
ASRS Report	526796
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 220 flight time total : 5000 flight time type : 665
ASRS Report	526797
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During departure, we were being vectored to follow traffic for our climb. ATC gave us heading of 010 degrees which I mistakenly took for 100 degrees. I turned to the heading I had heard. Approximately 10 mi later departure asked our heading and issued a left turn to 330 degrees to correct our course. Departure was normal from that point on. To my knowledge, no aircraft were endangered nor required to deviate due to my honest mistake. More careful attention will prevent reoccurrence. Supplemental information from acn 526797: the pilot flying turned instead to 100 degrees which I did not recognize due to the other cockpit duties. To prevent this from happening again, I plan to ensure the pilot flying turns to the correct heading before I divert my attention to other duties.

Original NASA ASRS Text

Title: A B737-300 FLC ACCEPTS A CLRNC AND FLIES THE WRONG HDG OUT OF BWI, MD.

Narrative: DURING DEP, WE WERE BEING VECTORED TO FOLLOW TFC FOR OUR CLIMB. ATC GAVE US HEADING OF 010 DEGS WHICH I MISTAKENLY TOOK FOR 100 DEGS. I TURNED TO THE HEADING I HAD HEARD. APPROX 10 MI LATER DEP ASKED OUR HEADING AND ISSUED A LEFT TURN TO 330 DEGS TO CORRECT OUR COURSE. DEP WAS NORMAL FROM THAT POINT ON. TO MY KNOWLEDGE, NO ACFT WERE ENDANGERED NOR REQUIRED TO DEVIATE DUE TO MY HONEST MISTAKE. MORE CAREFUL ATTENTION WILL PREVENT REOCCURRENCE. SUPPLEMENTAL INFO FROM ACN 526797: THE PLT FLYING TURNED INSTEAD TO 100 DEGS WHICH I DID NOT RECOGNIZE DUE TO THE OTHER COCKPIT DUTIES. TO PREVENT THIS FROM HAPPENING AGAIN, I PLAN TO ENSURE THE PLT FLYING TURNS TO THE CORRECT HEADING BEFORE I DIVERT MY ATTENTION TO OTHER DUTIES.

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.