# NTSB ANC93IA115: Cessna 207, N9984M, Nome, AK, July 9, 1993 - Type: NTSB incident investigation - Classification: Incident · No injuries · Incident investigation · Final report - Date: July 9, 1993, 10:05 local (18:05 UTC) - Place: Nome, AK - Coordinates: 64.709709, -164.619293 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=64.7097&lon=-164.6193&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report August 1, 1994 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 2323 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93IA115 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/2323/pdf - Page: https://openairdocs.org/ntsb/ANC93IA115 ## Probable cause THE CHAFED FUEL LINE AND CHAFED ELECTRICAL WIRE AND THE IMPROPER MAINTENANCE PROCEDURE USED TO SECURE THE ELECTRICAL WIRE WITH A TIE WRAP. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Fire, cruise - fuel system,line - chafed (cause) - electrical system,electric wiring - chafed (cause) - maintenance - improper, unknown (cause) ## Analysis WHILE IN CRUISE FLIGHT A FIRE ERUPTED BENEATH THE CABIN FLOOR DIRECTLY BENEATH THE RIGHT FRONT SEAT. UPON LANDING THE FIRE WAS EXTINGUISHED WITH THE AIRPLANE'S FIRE EXTINGUISHER. EXAMINATION OF THE AIRPLANE SHOWED THAT AN ELECTRICAL WIRE HAD BEEN TIE WRAPPED TO A FUEL LINE. THE INSULATION ON THE WIRE HAD CHAFFED THROUGH AND THERE WAS A HOLE IN THE FUEL LINE. IT COULD NOT BE DETERMINED WHO PERFORMED ANY WORK IN THAT AREA. ## Factual narrative On July 9, 1993, at 1030 Alaska daylight time, a wheel equipped Cessna 207 airplane, registered to and operated by Baker Aviation of Kotzebue, Alaska, experienced an in flight fire in the cabin under the right front seat. The scheduled flight, operating under 14 CFR Part 135, departed Nome, Alaska, and the destination was White Mountain, Alaska. A visual flight rules flight plan was filed and visual meteorological conditions prevailed. The Airline Transport certificated Pilot-in-Command and his passenger were not injured and the airplane received minor damage. According to Larry Williams, the Director of Operations for Baker Aviation, an electrical wire had been tie wrapped to a fuel line located under the cabin floor directly beneath the right front seat. The electrical wire was chaffed through the insulation and the fuel line had a hole. The fire was extinguished with a hand held fire extinguisher. The Operator could not determine who had done any work in the area of the fire. ## Aircraft - Registration: [N9984M](https://openairdocs.org/deregistered/N9984M-2013-06-27), registration cancelled 2013-06-27, S/N 20700774, built 1984 (OpenAirDocs) - Reported make and model: CESSNA 207 - Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073605) (OpenAirDocs) - Registry engine: [Continental IO-520-F](https://openairdocs.org/engine/continental-io-520-f) (registry code 17237, reciprocating) (OpenAirDocs) - Category: Airplane - Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating - Damage: Minor damage - Fire: In-Flight - Flight: Part 135 - Registered owner: Baker Aviation - Airworthiness certificate: Standard, Normal - Destination: WMO, WHITE MOUNTAIN, AK - Flight plan: VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; flight instructor, airline transport, flight engineer, commercial; airplane ratings: single-engine land, multi-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 16,500 total, 100 in this make and model, 16,300 as pilot in command, 200 in the last 90 days, 100 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 20 knots, gusting 25 - Visibility: 3 statute miles - Lowest ceiling: 1,500 ft broken - Temperature: 61 °F, dew point 55 °F - Altimeter: 29.00 inHg ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 19930709026809I](https://openairdocs.org/incident/19930709026809I), Jul 9, 1993: Cessna 207, White Mountain, AK, Minor damage. Fire under cabin floor. Used haylon fire extinguisher. Fuel line dripping gas caused by electrical arc. ## Other investigations on N9984M (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 ANC97FA155](https://openairdocs.org/ntsb/ANC97FA155), Sep 26, 1997: Cessna 207A (N9984M), Twin Hills, AK, destroyed, 1 fatal. Probable cause: Improper in-flight planning/decision by the pilot, and his failure to maintain sufficient altitude over mountainous terrain. Factors related to the accident were downdraft conditions,… 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.