An air carrier widebody transport failed to turn when the SID required it.

Attributes
ACN	266968
Time
Date	199403
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sfo artcc : zma
Operator	common carrier : air carrier
Make Model Name	L-1011-500 Series
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : initial
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 2400 flight time type : 400
ASRS Report	266968
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 3000
ASRS Report	266798
Events
Anomaly	non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa other other : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After takeoff, after the 'gear up' call, the captain popped his seat belt release and said, 'I gotta go bad -- you've got it!' startled by this event, just after liftoff, I totally forgot the turn from 012 degrees to 030 degrees. Bay departure called me 'heavy, verify you are on a heading of 030 degrees.' I replied 'negative, but coming right at this time!' we were 3600 ft above the ground at 6 DME on the sfo 020 degree radial. Prevention: go to the bathroom before takeoff! Supplemental information from acn 266798: captain had an immediate physical need to use restroom. Suspected bad food from lunch. Captain was back by 5000 ft MSL and had to leave twice more by 3500 ft MSL (he had bad diarrhea).

Original NASA ASRS Text

Title: AN ACR WDB FAILED TO TURN WHEN THE SID REQUIRED IT.

Narrative: AFTER TKOF, AFTER THE 'GEAR UP' CALL, THE CAPT POPPED HIS SEAT BELT RELEASE AND SAID, 'I GOTTA GO BAD -- YOU'VE GOT IT!' STARTLED BY THIS EVENT, JUST AFTER LIFTOFF, I TOTALLY FORGOT THE TURN FROM 012 DEGS TO 030 DEGS. BAY DEP CALLED ME 'HVY, VERIFY YOU ARE ON A HDG OF 030 DEGS.' I REPLIED 'NEGATIVE, BUT COMING R AT THIS TIME!' WE WERE 3600 FT ABOVE THE GND AT 6 DME ON THE SFO 020 DEG RADIAL. PREVENTION: GO TO THE BATHROOM BEFORE TKOF! SUPPLEMENTAL INFO FROM ACN 266798: CAPT HAD AN IMMEDIATE PHYSICAL NEED TO USE RESTROOM. SUSPECTED BAD FOOD FROM LUNCH. CAPT WAS BACK BY 5000 FT MSL AND HAD TO LEAVE TWICE MORE BY 3500 FT MSL (HE HAD BAD DIARRHEA).

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.