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Date: May 25, 1979
Passengers: 258
Crew: 13
Fatalities: 271
Ground fatalities: 2
Total fatalities: 273
Cause: “...asymmetrical stall and the ensuing roll of the aircraft because of the uncommanded retraction of the left wing outboard leading edge slats and the loss of stall warning and slat disagreement indication systems resulting from maintenance-induced damage leading to the separation of the No. 1 engine and pylon assembly at a critical point during takeoff. The separation resulted from damage by improper maintenance procedures which led to failure of the pylon structure.”
 
 
Legend:
CAM     Voice transmitted from cockpit area microphone
PA      Voice transmitted from public address system
RDO     Radio transmission from accident aircraft
INT		Intercom
AG		American Ground
TWR		Chicago Tower
CGC		Chicago Ground Control
RC		Ramp Control
CLD		Clearance delivery
LC		Load control
-1      Voice identified as captain
-2      Voice identified as first officer
-3		Voice identified as flight engineer
-4		Voice specified but not identified?
-?		Voice unidentified
*       Unintelligible word
@       Non-pertinent word
#       Expletive
( )     Questionable insertion
(( ))   Editorial insertion
...     Pause
Times expressed in CDT
 
 
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1455:09		CAM-2	Talking about yah know testing the thing and why, the last time I was in school they were talking about the importance of those little beauties, if one of those things is out, doesn't light up when you test it, it means that the valve is closed and your (flight) controls *
			CAM-?	Yeah you got to have one of those pumps
			CAM-?	Yeah
			CAM-?	Not the pumps, it's the ah
			CAM-?	*
			CAM-?	Work on it
			CAM-?	*

1455:31		CAM-2	So be sure that you always test that

1455:37		AG		Release the brakes
			INT-1	Brakes released
			CAM-1	We're ready to start and
			AG		And you're clear to start all engines
			INT-1	Clear to start
			RDO		((Sound of two clicks))
			CAM-1	Cranking three

1455:43		CAM-?	Thirty six
			CAM-2	Haven't got clearance

1456:00		RDO-2	American one ninety one is pushing kilo five
			RC		One nine one go ahead and push ((extraneous radio on channel four))
			CAM-2	Thanks (he says) go ahead and push)

1456:12		CAM-2	That was nice of him
			CAM-2	At least he's watching
			CAM-1	Afraid so
			CAM-1	Lights out
			CAM-1	One

1456:43		CAM-2	What are you doing Al?
			CAM-2	They all (call) back there? ((the word is slightly obscured))
			CAM-3	* problem (back there)
			CAM-3	Trying to fix it

1456:50		CAM-?	Need a little air?
			CAM-?	Huh
			CAM-1	Naw I'm talking about passenger air
			CAM-3	Oh

1457:06		CAM-2	All full back there are they
			CAM-4	Yeah as far as I can tell

1457:13		AG		Park the brakes
			INT-1	Brakes parked
			CAM-1	Cranking two
			AG		Watch for the signals straight ahead and have a good flight
			INT-1	Adios
			AG		Good day
			RDO-3	One nine one's out at five six
			RC		Thank you one nine one
			RDO-3	One nine one's standing by

1457:47		CAM-1	I'm not showing any fuel flow on number two, I don't know what going on, but it's lighting

1458:01		CAM-1	Ready to taxi

1458:05		RDO-2	American heavy one nine one taxi

1458:06		CLD		Monitor ground point seven five
			RDO		((extraneous radio calls from other aircraft))

1458:11		RDO-2	American heavy one nine one taxi

1458:18		CLD		Who else, American one ninety one

1458:20		RDO-2	Affirm-

1458:21		CLD		Okay American one ninety one heavy monitor ground point seven five

1458:24		RDO-2	('kay)

1458:28		CAM-1	How about a circuit breaker for number two fuel flow
			RDO		((extraneous conversation))

1458:43		CAM-3	Nope

1458:47		CAM-?	How could this happen

1458:53		GND		American one ninety one heavy thirty two right over the bridge

1458:57		RDO-2	Three two right over the bridge one ninety one
			CAM-1	Nice

1459:03		CAM-2	Scratch all after

1459:06		CAM-1	Ready for a reading *
			RDO		((extraneous conversation))
			LC		One ninety one load
			RDO-3	One ninety on go ahead
			LC		Gross takeoff three seven nine thousand zero fuel three zero zero thousand the trim of five up
			GND		American one ninety one heavy monitor tower one eighteen one
			LC		That's based on ten degrees flaps MAC of twenty percent
			RDO-2	One ninety one
			LC		Our passengers are as planned minus one, we do show one "W" over
			RDO-3	Three seven nine three hundred five up twenty percent, ten degree flap as planned minus one and a "W"

1500:37		CAM-1	Oh we're about two thousand pounds heavier must of got a little bit of

1500:41		CAM-2	Got an empty coach seat it says
			CAM-1	Yeah

1500:48		CAM-2	Numbers are good

1500:51		CAM-3	Okay, hydraulic, fuel, APU shoulder harness

1500:54		CAM-2	On the right

1500:55		CAM-3	Flight guidance, radios

1501:05		CAM-2	Programmed
			CAM-3	Flight guidnace, radios
			CAM-2	Checked on the right
			CAM-1	Okay here
			CAM-3	Flight instruments and bugs
			CAM-2	Set right
			CAM-1	'kay on the left

1501:11		CAM-3	Thrust computer

1501:13		CAM-2	T.O.
			CAM-3	Stabilizer trim
			CAM-1	Five up set and operating
			CAM-2	Five up

1501:18		CAM-3	Aileron, rudder
			CAM-1	Zero, zero

1501:20		CAM-3	Flaps and slats
			CAM-1	Ten and tape takeoff
			CAM-2	Verified
			CAM-3	Verified
			CAM-3	Flight controls

1501:21		TWR		American one nine one heavy thirty two right position hold and traffic landing niner left

1501:25		RDO-2	Position and hold American one ninety one
			CAM-?	*

1501:28		CAM-3	Yaw dampeners
			CAM-1	There on and working
			CAM-3	Engine anti-ice
			CAM-2	It's off
			CAM-3	Pitot heat

1501:35		CAM-2	It's on and checked

1501:39		CAM-3	Spoiler handles
			CAM-1	Armed

1501:45		CAM-1	How's everything going back there Al

1501:47		CAM-3	All right
			CAM		((Sound of chuckle))
			CAM-2	Normal
			CAM-2	How come we have a pitot heat inoperative

1501:56		CAM-1	We must have some electrical problem somewhere because a
			CAM-3	We must have a # electrical problem

1502:00		CAM-1	We don't have any fuel flow on number two
			CAM-2	You wanta go into position
			CAM-1	Let's not we're going to * with it for a while *

1502:05		CAM-1	We still don't have the fuel flow
			CAM-2	Okay the pitot heat's okay

1502:08		CAM-3	There she goes
			CAM-2	There's the fuel flow
			CAM-1	Okay

1502:10		CAM-?	Uh huh
			CAM-1	Aft lav circuit breaker
			CAM-2	Wait, what was out

1502:14		CAM-3	Phase "B"
			CAM-1	I was gonna say we didn't have any ah

1502:16		CAM-3	Number two

1502:18		CAM-1	You might have that pump back now
			CAM-3	Yeah I do have it now, okay

1502:23		CAM-1	Cause I didn't have any light up here I wondered about that
			RDO		((Sound of three chimes))
			CAM-2	Yeah when you, when you mentioned that # there's gotta be a

1502:28		CAM-3	Phase circuit breaker
			CAM-2	Yes
			CAM-1	Ready

1502:30		PA-?	Flight attendants we will be taking off momentarily, like to have 'em please be seated
			CAM-2	Okay
			RDO		((Extraneous conversation))

1502:38		TWR		American one ninety one turn right heading three three zero cleared for takeoff thirty two right no delay

1502:43		RDO-1	Ah

1502:45		RDO-1	American one ninety one underway

1502:52		CAM-3	Packs off

1503:00		CAM-2	Ninety nine and four

1503:06		CAM		((Sound of click))

1503:12		CAM-1	There's eighty knots

1503:13		CAM-2	Okay

1503:16		CAM		((Sound similar to electric seat))

1503:29		CAM-1	Vee one

1503:31		CAM-1	Rotate
			CAM		((Sound of click)) ((dull click))

1503:37		CAM-2	Damn!

1503:37.5	CAM		((Rise in noise level))

1503:38				((end of recording))


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https://www.youtube.com/watch?v=bTwt5rDDOms --- ATC recording after AA191 lost the engine. ORD tower watches the plane turn and crash.