# NTSB CEN22LA425: Slipstream Revelation, Delphi, IN, September 17, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: September 17, 2022, 18:45 local (22:45 UTC) - Place: Delphi, IN - Coordinates: 40.540286, -86.681154 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.5403&lon=-86.6812&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR pattern final: Fuel related](https://openairdocs.org/ntsb-events/190) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 105966 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA425 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105966/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105966 - Page: https://openairdocs.org/ntsb/CEN22LA425 ## Probable cause A loss of engine power due to carburetor icing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Temp/humidity/pressure: conducive to carburetor icing](https://openairdocs.org/ntsb-findings/03031030): Environmental issues › Conditions/weather/phenomena · Effect on equipment (probable cause); cases with it: [All aircraft, 435 cases](https://openairdocs.org/ntsb-findings/03031030/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach-VFR pattern final: Fuel related](https://openairdocs.org/ntsb-events/190) (defining event); cases with it: [All aircraft, 361 cases](https://openairdocs.org/ntsb-events/190/sequence.md) - [Approach-VFR pattern final: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342); cases with it: [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) - [Approach-VFR pattern final: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241); cases with it: [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md) ## Analysis The pilot reported that he and his passenger were completing a personal flight in an unregistered, experimental airplane that was not equipped with carburetor heat. They departed and flew the traffic about 800 to 1,000 ft above ground level (agl) and the engine was operating about 6,000 rpm. He turned on the left base leg and decreased throttle to about 4,000 rpm, and descended to about 600 ft, when the engine lost power. He stated that the engine acted the same as the last time he experienced carburetor icing. The airplane descended quickly, and he did not flare properly, which resulted in a stall, and subsequent impact with the runway. The pilot and passenger egressed without further incident and a post impact fire consumed a majority of the wreckage. The pilot reported that there were no mechanical malfunctions or failures that would have precluded normal operation and added that the loss of power was due to carburetor ice. Due to the post impact fire, an examination was not completed. The airplane was operating in an environment that was conducive to serious carburetor icing at glide power settings. ## Aircraft - Registration: UNREG (not matched to a registry record) - Reported make and model: SLIPSTREAM Revelation - Category: Airplane, amateur-built - Serial number: - - Year built: 1998 - Airframe hours: 100 - Engines: Rotax 503 DCDI 52 horsepower reciprocating - Damage: Destroyed - Fire: On-Ground - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental light sport (Special) - Airport: 1I9, Delphi Muni, runway 36, 4,001 × 60 ft, concrete - Equipment: Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 71; injuries: minor; seat: left; restraint: 4-point; flight hours: 735 total, 735 as pilot in command ## Weather - Conditions: Visual (VMC), Dusk - Wind: 190° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 77 °F, dew point 61 °F - Altimeter: 30.03 inHg - Observed at: KLAF, 14 nm away - METAR: KLAF 172354Z 19005KT 10SM CLR 25/16 A3003 RMK AO2 SLP166 T02500156 10289 20250 56005 ## Docket (4 files) The files NTSB released with the investigation on November 21, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105966. 6.6 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 5.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14684407&FileExtension=pdf&FileName=6120%20-%20Pilot_Redacted-Rel.pdf - Memorandum for record a�� telephone interview, pilot (item 2, PDF, 1 page, 67 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14684924&FileExtension=pdf&FileName=ROC%20pilot-Rel.pdf - Photos (item 3, PDF, 2 pages, 2 photos, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14755307&FileExtension=pdf&FileName=Photos-Rel.pdf - SAIB CE-09-35 carburetor icing prevention (item 4, PDF, 3 pages, 104 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14724484&FileExtension=pdf&FileName=Carb%20icing%20CE-09-35%5B1%5D-Rel.pdf From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.