# NTSB MIA99LA135: Cessna 150M, N66560, S. Rockledge, FL, April 20, 1999 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: April 20, 1999, 16:00 local (20:00 UTC) - Place: S. Rockledge, FL - Coordinates: 28.309991, -80.719978 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=28.3100&lon=-80.7200&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report March 31, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 46146 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA99LA135 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46146/pdf - Page: https://openairdocs.org/ntsb/MIA99LA135 ## Probable cause A total loss of engine power while in cruise flight due to the pilot's failure to use carburetor heat during carburetor icing conditions and the subsequent emergency landing to unsuitable terrain and collision with a tree. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - nonmechanical, cruise - weather condition - carburetor icing conditions - fuel system,carburetor - ice - carburetor heat - not used, pilot in command (cause) - Forced landing, emergency descent/landing - In flight collision with object, emergency landing - terrain condition - none suitable - terrain condition - residential area - object - tree(s) ## Analysis The student pilot stated he was nearing his destination on the first leg of his solo cross-country, still in cruise flight, when the engine suddenly lost power. He stated that he performed the procedures for engine failure, but does not remember using carburetor heat. He did not regain engine power, and was forced to make an emergency landing in a residential area, sustaining minor injuries and substantially damaging the airplane. Examination of the aircraft, engine, fuel system, and all components by an FAA inspector revealed no failures or malfunctions. The temperature and dew point reported by a station 15 miles from the accident would have put this flight within the region labeled, 'visible icing at glide and cruise power' using carburetor icing probability charts. ## Factual narrative On April 20, 1999, about 1600 eastern daylight time, a Cessna 150M, N66560, registered to Brittania Flight Center, Inc., operating as a 14 CFR Part 91 instructional flight, crashed while attempting an emergency landing, following a loss of engine power near Rockledge, Florida. Visual meteorological conditions prevailed and no flight plan was filed. The airplane received substantial damage and the student pilot, the sole occupant, sustained minor injuries. The flight originated from Winter Park, Florida, about 1 hour before the accident. According to eyewitnesses, the airplane engine's sound lessened and stopped completely. The engine sounded quiet as the pilot appeared to look for a landing area. The airplane crashed in a residential area. According to the student pilot, he was flying his solo cross-country flight from Winter Haven's Gilbert Airport to Cocoa's Merritt Island Airport. About 10 miles west of Merritt Island, he radioed Merritt unicom for traffic advisories and to relay his intentions. He stated he was in cruise flight at 1,800 feet msl, 2,300 (engine rpm), and mixture leaned "appropriately". Immediately after his radio transmission, he noticed an uncommanded reduction in engine rpm, and a loss of power. He got no response to increasing his throttle setting, so he began emergency procedures for an engine failure, except that he does not remember using carburetor heat. His two options for a forced landing site were a road or a field. The road contained too much traffic and the field was ringed by high tension wires and contained playing children. According to an FAA inspector, the airplane struck a tree and came to rest in the front yard of a private residence on its side, right wing up. The FAA inspector could not estimate the amount of fuel aboard, but stated the left tank contained enough fuel that the fuel line and vent line had to be plugged to prevent spillage when the wing was removed. The gascolator and carburetor contained fuel. Fire rescue personnel responding to the accident mentioned they sandbagged the storm sewer drain to prevent a "significant amount" of fuel from entering the storm drain. The carburetor squirted fuel through the venturi when the throttle linkage was manually pumped. The airplane was equipped with properly vented fuel tank caps. Testing of fuel for water content was negative. Disassembly examination of the engine and its components revealed no mechanical failures or malfunctions. Aircraft records revealed an appropriate supplemental type certificate (STC), for automotive fuel use. The spark plugs and combustion chambers exhibited abnormally dark coloration, and it is the FAA inspector's opinion that the coloration is the result of, "..a fuel rich mixture which would be consistent with carburetor icing". Reference to carburetor icing charts reveals that an ambient temperature of 24 degrees C and a dew point of 9 degrees C, as reported by Titusville (TIX) and Melbourne (MLB) for the time period of the accident, would put the flight's probability within the region labeled, "visible icing at glide and cruise power." A copy of the chart is included in this report under, "Other Pertinent Forms and Reports". ## Aircraft - Registration: [N66560](https://openairdocs.org/deregistered/N66560-1999-06-22), registration cancelled 1999-06-22, S/N 15076124 (OpenAirDocs) - Reported make and model: Cessna 150M - Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs) - Category: Airplane - Serial number: 15076124 - Airframe hours: 3746 - Engines: Continental O-200A 100 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Registered owner: Britannia Flight Center, Inc. - Airworthiness certificate: Standard, Utility - Last inspection: 100 hour, April 2, 1999 - Departed: GIF, WINTER PARK, FL - Destination: COI, MERRITT ISLAND, FL ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 27; student; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 155 total, 140 in this make and model, 95 as pilot in command, 155 in the last 90 days, 99 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 100° at 8 knots - Visibility: 7 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 72 °F - Altimeter: 30.00 inHg - Observed at: TIX, 15 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19990420019199A](https://openairdocs.org/incident/19990420019199A), Apr 20, 1999: Cessna 150M, S Rockledge, FL, Substantial damage. (.19) On April 20, 1999, about 1600 eastern daylight time, a Cessna 150M, N66560, registered to brittania flight center, inc., operating as a 14 CFR part 91… ## Other investigations on N66560 (1) 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. - [NTSB IAD78DKW05](https://openairdocs.org/ntsb/IAD78DKW05), May 11, 1978: Cessna 150 (N66560), Philadelphia, TN, substantial damage 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.