Narrative:

After normal landing at sfo, were holding between runways 28R and 28L. First officer and I noticed abnormal sound and monitored hydraulic system. Hydraulic quantity on left side was zero. We were cleared across runway 28L when flight attendant chime sounded. Flight attendant requested we open cockpit door. We saw smoke coming from rear of cabin. I ordered forward flight attendant to evacuate/evacuation through forward airstair as only 59 passenger and smoke was light. (We recognized smell as skydrol.) after declaring emergency and ordering emergency men and equipment, I completed evacuate/evacuation checklist. I entered cabin and saw that flight attendant was gone. Passenger were getting bags and moving slowly. I yelled at passenger to leave luggage and deplane. Passenger began to move much quicker. I checked all seats and lavs and deplaned through forward airstair. On ground, I saw passenger on wing going back into cabin through over-wing exit. I reentered aircraft through forward airstair and ran down aisle and yelled at passenger to get back out on wing. Fireman used ladder to remove passenger from wing. No injuries to passenger were incurred in evacuate/evacuation process. (We had determined earlier that no fire had occurred.) callback conversation with reporter revealed the following information: the reporter was flying an early model md-80. The aircraft had been dispatched with 1 generator inoperative using the APU in flight for electrical power. This caused the tail cone to be very hot. Upon stowing the reversers, a 'B' nut failed, dumping the left hydraulic system fluid into the tail cone. The hot APU vaporized the non- flammable 'skydrol' hydraulic fluid and sent the vapor into the cabin through the air conditioning system. As 'skydrol' is toxic to humans and unpleasant to breathe, the aft flight attendant attempted to call the cockpit by using the chime system. On the early model md-80, rapid ringing of the chime system will cancel itself out so that no chime is heard in the cockpit. The forward flight attendant came to the cockpit and said something like 'do you want us to use the slides or the forward door?' this is the first indication that the cockpit had that there was a serious problem. The reporting captain ordered the airstairs to be used. The aft flight attendant opened an over-wing exit letting people out onto the wing. There are no slides off of the wing in the md-80. When the forward flight attendant saw people on the wing, she went outside to keep people from jumping off of the wing. This left no one in the cabin to direct or expedite the evacuate/evacuation. The reporter directed the remaining passenger out the forward door. Ladders were brought out to get passenger off of the wing. The air carrier has changed its procedures regarding evacuate/evacuation -- flight attendants now have the 'autonomy' to start an evacuate/evacuation when they deem it necessary.

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Original NASA ASRS Text

Title: EMER EVACUATION.

Narrative: AFTER NORMAL LNDG AT SFO, WERE HOLDING BTWN RWYS 28R AND 28L. FO AND I NOTICED ABNORMAL SOUND AND MONITORED HYD SYS. HYD QUANTITY ON L SIDE WAS ZERO. WE WERE CLRED ACROSS RWY 28L WHEN FLT ATTENDANT CHIME SOUNDED. FLT ATTENDANT REQUESTED WE OPEN COCKPIT DOOR. WE SAW SMOKE COMING FROM REAR OF CABIN. I ORDERED FORWARD FLT ATTENDANT TO EVAC THROUGH FORWARD AIRSTAIR AS ONLY 59 PAX AND SMOKE WAS LIGHT. (WE RECOGNIZED SMELL AS SKYDROL.) AFTER DECLARING EMER AND ORDERING EMER MEN AND EQUIP, I COMPLETED EVAC CHKLIST. I ENTERED CABIN AND SAW THAT FLT ATTENDANT WAS GONE. PAX WERE GETTING BAGS AND MOVING SLOWLY. I YELLED AT PAX TO LEAVE LUGGAGE AND DEPLANE. PAX BEGAN TO MOVE MUCH QUICKER. I CHKED ALL SEATS AND LAVS AND DEPLANED THROUGH FORWARD AIRSTAIR. ON GND, I SAW PAX ON WING GOING BACK INTO CABIN THROUGH OVER-WING EXIT. I REENTERED ACFT THROUGH FORWARD AIRSTAIR AND RAN DOWN AISLE AND YELLED AT PAX TO GET BACK OUT ON WING. FIREMAN USED LADDER TO REMOVE PAX FROM WING. NO INJURIES TO PAX WERE INCURRED IN EVAC PROCESS. (WE HAD DETERMINED EARLIER THAT NO FIRE HAD OCCURRED.) CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WAS FLYING AN EARLY MODEL MD-80. THE ACFT HAD BEEN DISPATCHED WITH 1 GENERATOR INOP USING THE APU IN FLT FOR ELECTRICAL PWR. THIS CAUSED THE TAIL CONE TO BE VERY HOT. UPON STOWING THE REVERSERS, A 'B' NUT FAILED, DUMPING THE L HYD SYS FLUID INTO THE TAIL CONE. THE HOT APU VAPORIZED THE NON- FLAMMABLE 'SKYDROL' HYD FLUID AND SENT THE VAPOR INTO THE CABIN THROUGH THE AIR CONDITIONING SYS. AS 'SKYDROL' IS TOXIC TO HUMANS AND UNPLEASANT TO BREATHE, THE AFT FLT ATTENDANT ATTEMPTED TO CALL THE COCKPIT BY USING THE CHIME SYS. ON THE EARLY MODEL MD-80, RAPID RINGING OF THE CHIME SYS WILL CANCEL ITSELF OUT SO THAT NO CHIME IS HEARD IN THE COCKPIT. THE FORWARD FLT ATTENDANT CAME TO THE COCKPIT AND SAID SOMETHING LIKE 'DO YOU WANT US TO USE THE SLIDES OR THE FORWARD DOOR?' THIS IS THE FIRST INDICATION THAT THE COCKPIT HAD THAT THERE WAS A SERIOUS PROB. THE RPTING CAPT ORDERED THE AIRSTAIRS TO BE USED. THE AFT FLT ATTENDANT OPENED AN OVER-WING EXIT LETTING PEOPLE OUT ONTO THE WING. THERE ARE NO SLIDES OFF OF THE WING IN THE MD-80. WHEN THE FORWARD FLT ATTENDANT SAW PEOPLE ON THE WING, SHE WENT OUTSIDE TO KEEP PEOPLE FROM JUMPING OFF OF THE WING. THIS LEFT NO ONE IN THE CABIN TO DIRECT OR EXPEDITE THE EVAC. THE RPTR DIRECTED THE REMAINING PAX OUT THE FORWARD DOOR. LADDERS WERE BROUGHT OUT TO GET PAX OFF OF THE WING. THE ACR HAS CHANGED ITS PROCS REGARDING EVAC -- FLT ATTENDANTS NOW HAVE THE 'AUTONOMY' TO START AN EVAC WHEN THEY DEEM IT NECESSARY.

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.