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ASN Wikibase Occurrence # 213017
Last updated: 12 February 2020
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Time:21:23 LT
Type:Silhouette image of generic EC35 model; specific model in this crash may look slightly different
Eurocopter EC 135P1
Owner/operator:Pentastar Aviation Charter opf Superior Ambulance
Registration: N312SA
C/n / msn: 0054
Fatalities:Fatalities: 0 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Roseland Area of South Chicago, IL -   United States of America
Phase: En route
Departure airport:St Mary Medical Center, Hobart, IN
Destination airport:Advocate Christ Medical Center, Oak Lawn, IL
Subsequent to a Mayday call, the air ambulance helicopter autorotated to major road junction median area in the Roseland Area of South Side Chicago, Illinois, sustaining damage but reportedly remaining upright. Onboard was a patient with previous serious injuries and three air ambulance personnel. The pilot and paramedic sustained minor injuries, the flight nurse sustained serious injuries, and the patient was uninjured during the accident.
About 5 miles southeast of Advocate Christ Medical Center, the helicopter turned to the right after the pilot requested to return to the Gary, Indiana, airport. About 50 seconds later, the pilot declared a "mayday" and stated the helicopter was going down into a field. The helicopter came to rest upright in a grass area between the Interstate 94 and Interstate 57 interchange.

Surveillance video from a Chicago Transit Authority rail platform located adjacent to the accident site depicted the helicopter during the final phase of the autorotation and impact with terrain. The video showed a fire near the number 2 (right) engine during the autorotation. A explosion was observed after the impact with terrain.

Both engines power turbine wheel blades were missing the outer halves of the blades. Multiple impact dents, consistent with the fractured turbine blades, were noted inside the exhaust stubs. The No. 1 engine had a 1/2" by 1/2" hole in the exhaust stub at the 2 o'clock position forward of the aft firewall, and the No. 2 engine had a 2" by 1" hole in the exhaust stub at the 11 o'clock position forward of the aft firewall.



Revision history:

08-Jul-2018 05:42 Geno Added
08-Jul-2018 05:54 Geno Updated [Aircraft type, Operator, Source]
08-Jul-2018 06:00 Aerossurance Updated [Aircraft type]
08-Jul-2018 07:43 Aerossurance Updated [Aircraft type, Registration, Cn, Source, Embed code, Narrative]
15-Jul-2018 09:57 Aerossurance Updated [Time, Operator, Location, Phase, Departure airport, Destination airport, Source, Embed code, Damage, Narrative]
15-Jul-2018 14:46 Aerossurance Updated [Embed code]
04-Aug-2018 11:20 Aerossurance Updated [Source]
09-Nov-2019 21:21 Aerossurance Updated [Embed code]

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