Ntsb/Aar-78-03
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I NATIONAL TRANSPORTATION SAFETY BOARD Washington, D. C. 20594 a11 thrust was lo$*. The engines could not be restarted and the flightcrew was eed to make an emergency landing. The National Transportation Safety Board determines that the Drobable cause of accident was the total and unique^ loss of thrust from both engines while the aft was penetr9ting an area of severe thunderstorms. The loss of thrust was d by the ingestion of massive amounts.of water and hail which in combination .thrust lever movement induced severe stalline in and malor damaee to the eneine tributing factors included the failure of the company's dispatching o provide the flightcrew with up-to-date severe weather information pertain- he aircraft's intended route of flight, the captain's reliance on airborne radar for penetration of thunderstorm areas, and limitations in the Federal nical Information Service, 1 Weather Service; emergency landing. Springfield, Virginia 22151 I rity Classification 20.Security Classification 21.~0.of pages 22.price (of this oaae) TABLE OF CONTENTS Page NA Synopsis .................... 1 1. Factual Information .............. 2 1.1 History of Flight ............... 2 Adopted: January 26 1.2 Injuries to Persons .............. 7 1.3 Damage to Aircraft. .............. 8 1.4 Other Damage. ................. 8 1.5 Personnel Information ............. 8 1.6 Aircraft Information. ............. 8 1.7 Meteorological Information. .......... 9 1.8 Aids to Navigation. .............. 14 1.9 Communications. ................ 15 1.10 Aerodrome and Ground Facilities ........ 15 i 1.11 Flight Recorders. ............... 15 About 1619 1.12 Wreckage and Impact Information ........ 17 DC-9, operating as S( 1.13 Medical and Pathological Information. ..... 21 After losing both ens 1.14 Fire. ..................... 21 landing on State Spul 1.15 Survival Aspects. ............... 22 persons aboard Flight 1.16 Tests and Research. .............. 25 and 1 was slightly in 1.17 Additional Information. ............ 27 Additionally, eight p 1.17.1 Aircraft Performance Data ........... 27 seriously injured; th 1.17.2 Southern Airways, Inc., Operating Procedures. 27 accident. Thz aircra 1.17.3 Aircraft Weather Radar. ............ 29 1.17.4 Air Traffic Control and Severe Weather Flight 242 Avoidance. ................. 30 17,000 feet and 14,OO .* Huntsville, Alabama, 2. Analysis and Conclusions ............ 31 all thrust was lost. 2.1 Analysis .................... 31 was forced to make an 2.1.1 Engine Failures and Flightcrew Reactions .... 31 1 The Nationa. 2.1.2 Acquisition, Dissemination, and Interpretation I of Weather Information ............ 35 probable cause of this from both,engines whi: 3. Conclusions. .................. $9 .thunderstorms. The 1~ 3.1 Findings. ................... 39 amounts of water and 1 3.2 Probable Cause ................. 41 induced severe stallir I 4. Recommendations. ................ 42 Major contri spatching system to information pertaining I: 5. Appendixes . ................. 49 Appendix A - Investigation and Hearing .... 49 aptain's reliance on Appendix B - Personnel Information ...... 50 torm areas, and limit Appendix C - Aircraft Information. ...... 52 raffic control system Appendix D - Cockpit Voice Recorder Transcript 53 ime hazardous weather Appendix E - Probable Ground Track and Weather Radar Plot. .......... 99 Appendix F - Summary of Passenger and Flight Attendant Observations. .... 101 103 Appendix G - Advisory Circular 90-12B. .... NATIONAL TRANSPORTATION SAFETY BOARD WASHINGTON, D.C. 20594 AIRCRAFT ACCIDENT REPORT Adopted: January 26, 1978 SOUTHERN AIRWAYS, INC. DC-9-31, N1335U NEW HOPE, GEORGIA APRIL 4, 1977. SYNOPSIS \ About 1619 e.s.t. on April 4, 1977, a Southern Airways, Inc., DC-9, operating as Southern Flight 242, crashed in New Hope, Georgia. After losing both engines in flight, Flight 242 attempted an emergency landing on State Spur Highway 92, which bisected New Hope. Of the 85 persons aboard Flight 242, 62 were killed, 22 were seriously injured, and lwas slightly injured. One passenger died on June 5, 1977. Additionally, eight persons on the ground were killed and one person was seriously injured; the injured person died about 1 month after the accident. Th-. aircraft was destroyed. Flight 242 entered a severe thunderstorm during flight between 17,000 feet and 14,000 feet near Rome, Georgia, while en route from Buntsville, Alabama, to Atlanta, Georgia. Both engines were damaged and all thrust was lo&. The engines could not be restarted, and the flightcrew was forced to make an emergency landing. The National Transportation Safety Board determines that the probable cause of this accident was the total and unique loss of thrust tfrm both,engines while the aircraft was penetrating an area of severe kthunderstorms. The loss of thrust was caused by the ingestion of massive $mounts of water and hail which in combination with thrust lever movement Nnduced severe stalling in and major damage to the engine Major contributing factors included the failure of the company's patching system to provide the flightcrew with up-to-date severe weather ormation pertaining to the aircraft's intended route of flight, the in's reliance on airborne weather radar for penetration of thunder- areas, and limitations in the Federal Aviation Administration's air ic control system which precluded the timely dissemination of real- hazardous weather information to the flightcrew. - 2- 1. FACTUAL INFORMATION At 1558:lO Air Route Traffic Cor 1.1 History of Flight captain said, "As 10, The first officer re1 On April 4, 1977, Southern Airways, Inc., Flight 242, a DC-9-31, (N1335U) operated as a scheduled passenger flight from Muscle Shoals, At. 1558:26. Alabama, to Atlanta, Georgia, with an intermediate stop at Huntsville, that a SIGMET 51 was Alabama. Flight 242 departed Muscle Shoals at 1521 11 and landed at Louisiana, Mississipr Huntsville about 1544. coastal waters, and L nmi radius of the SI( About 1554, Flight 242 departed Huntsville on an instrument 242 to contact Atlant flight rules (IFR) flight plan for the Hartsfield-Atlanta International At 1559:00, the Airport; there were 81 passengers and 4 crewmembers aboard. The flight's captc route was direct to the Rome VOR and then a Rome runway 26 profile At 1559:06, descent to Atlanta. Its estimated time en route was 25 min and its Center (Sector 39) ar requested en route altitude was 17,000 ft 21. The controller replie Flight 242 acknowledg At 1554:35, Flight 242 established communications with Huntsvil' and 1602:03, the Atla departure control and at 1554:39, the controller cleared the flight to its deviations eastwa climb to 17,000 ft. At 1555:14, the controller cleared the flight to and Rome, Georgia. A proceed directly to the Rome VOR. According to the cockpit voice recorde 242's CVR. At 1602:5 (CVR), at 1555:58 the captain remarked, "Well the radar is full of it, better slow it UP rig take your pick." At 1556:00, the controller told Flight 242 that his I, Got ya covered." radarscope was showing heavy precipitation and that the echos were about 5 nmi ahead of the flight. Flight 242 responded, "Okay. we're in the .. At 1603:01, rain right now...it doesn't look much heavier than what we're in, does m Eastern Airlines f it?" At 155d12, the controller said, ". ..I got weather cutting devices 3f Rome, and asked, is on which cutting out the precip that you're in now... however, it's JP there? You recom not a solid mass, it...appears to be a little bit heavier than what Inswered that "it was you're in right now." Flight 242 replied, "Okay, thank you." re would consider the :old to contact Atlan At, 1556:37, the first officer, who was flying the airplane, lound of light rain w; said, "I can't read that, it just looks like rain, Bill. What do YOU bstablished communica thir&? There's a hole." The captain responded, "there's a hole right :aid, ".. .level at se? here. That's all I see." He added, "Then coming over, we had pretty leavy, nothing's goin, good radar. I believe right straight ahead...there the next few miles hat." The first off: is about the best way we can go." eplied, "It's not sh< ain was At 1557:36, the controller said, "...you're in what appears to recorded on I Do you want to go art be about the heaviest part of it now, what are your flight conditions." aid, "Hand fly it abc Flight 242 replied, "...we're getting a little light turbulence and...I'd 285." say moderate rain.." At 1557:47, the controller acknowledged Flight 242's report and told the flight to contact Memphis Center. I Significant Mete01 -1/ All times herein are eastern standard, based on the 24-hour clock. weather significar tornadoes, lines c -2/ A very high frequency omnidirectional range navigational aid located hail, severe and E about 72 nmi east-southeast of Huntsville and 46 mi northwest of sandstorms. the Atlanta airport. -31 All altitudes herein are mean sea level unless otherwise specified. - 3- At 1558:10, Flight 242 established comunications with Memphis ir Route Traffic Control Center (Memphis Center). At 1558:32, the aptain said, "As long as it doesn't get any heavier we'll be all right." i1, he first officer replied, "Yeah, this is good." At 1558:26, the Memphis Center controller advised the flight hat a SIGMET A/ was current for the vicinity of Tennessee, southeastern ,ouisiana,Mississippi, northern and western Alabama, and adjacent :oastal waters, and advised them to monitor VOR broadcasts within a 150- mi radius of the SIGMET area. At 1558:45, the controller told Flight !42 to contact Atlanta Air Route Traffic Control Center (Atlanta Center). '5 it 1559:00, the captain said, "Here we go ...hold 'em cowboy." At 1559:06, Flight 242 established communications with Atlanta :enter (Sector 39) and stated that it was "out of eleven for seventeen." %e controller replied, "...roger, expect Rome runway 26 profile descent.'' rill 'light 242 acknowledged the controller's transmission.