# NTSB NYC04LA204: Beech BE-95-A55, N9779Y, Louisville, KY, September 4, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 4, 2004, 16:30 local (20:30 UTC) - Place: Louisville, KY - Coordinates: 38.174446, -85.736114 - Nearby events: https://openairdocs.org/map.md?lat=38.1744&lon=-85.7361&mi=10 - Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report October 3, 2006 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 60067 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC04LA204 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/60067/pdf - Page: https://openairdocs.org/ntsb/NYC04LA204 ## Probable cause The improper refueling of the left auxiliary fuel tank, which resulted in an overflow of fuel, and a subsequent explosion in the left wing during engine start. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Fire/explosion, standing - starting engine(s) - refueling - improper, fbo personnel (cause) ## Analysis Upon landing at the destination airport, the pilot was informed that he would have to pay a ramp and parking fee, or buy a minimum of 15 gallons of fuel. Even though the airplane would not require any additional fuel for the subsequent flight, the pilot opted to buy fuel to avoid paying the fees. While the refueler was servicing the left auxiliary fuel tank, he allowed between 1 and 5 gallons to overflow. About 15 minutes later, the pilot attempted to start the left engine, and simultaneously, an explosion occurred in the left wing. The engine did not start, but the pilot thought that it backfired at the time of the explosion. Examination of the left wing revealed damage consistent with an internal explosion, and that the fuel cells were intact, full of fuel, and not leaking. ## Factual narrative On September 4, 2004, about 1630 eastern daylight time, a Beech 95-A55, N9779Y, was substantially damaged when an explosion occurred in the left wing during left engine start at the Louisville International Airport-Standiford Field (SDF), Louisville, Kentucky. The certificated private pilot, and all three passengers were not injured. Visual meteorological conditions prevailed for the personal flight, destined for Nashville, Tennessee. No flight plan was filed, and the flight was conducted under 14 CFR Part 91. According to the pilot, he landed at Louisville in order to pickup one additional passenger, before flying on to Nashville. Once on the ground, he was informed that he would have to pay a ramp and parking fee, or buy a minimum of 15 gallons of fuel. Even though the airplane would not require any additional fuel for the subsequent flight, the pilot opted to buy some fuel to avoid paying the fees. While the refueler was servicing the left auxiliary fuel tank, he allowed approximately 4 to 5 gallons to overflow. The refueler advised the pilot of his mistake, and said he would add a couple of extra gallons to the right wing to makeup for what had been spilled. The refueler completed servicing the airplane, and then repositioned the truck. The pilot examined the left wing for any evidence of residual fuel, and approximately 15 minutes after the spill had occurred, loaded his passengers in preparation for departure. The pilot started the left engine, and simultaneously an explosion occurred in the left wing. The engine did not start, but the pilot thought that it may have backfired at the time of the explosion. According to the refueler, he was instructed to add 7 1/2 gallons to each wing. He serviced the left wing first, and inadvertently spilled 1 to 2 gallons in the process. The spilled fuel ran down the wing, off the trailing edge, and "it appeared to be evaporating quickly" from the ground. He then serviced the right wing, and then parked the fuel truck approximately 150 feet from the airplane. Sometime thereafter, he heard an explosion, and saw flames on the lower side of the left wing. He retrieved the handheld fire extinguisher from the fuel truck, and proceeded to the airplane where he extinguished the fire. According to a Federal Aviation Administration inspector that examined the airplane, the left wing displayed damage consistent with an internal explosion, and the fuel cells were intact, full of fuel, and not leaking. The inspector added that he observed "very little fire damage" on or in the left wing. ## Aircraft - Registration: [N9779Y](https://openairdocs.org/aircraft/N9779Y), registered now, S/N TC-440, built 1963 (OpenAirDocs) - Reported make and model: Beech BE-95-A55 - Registry model: [Beech 95-A55](https://openairdocs.org/model/beech-95-a55) (registry code 1152704) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: TC-440 - Airframe hours: 5400 - Engines: Continental IO-470 260 horsepower reciprocating; Continental IO-470 260 horsepower reciprocating - Damage: Substantial damage - Fire: On-Ground - Flight: Personal, Part 91 - Registered owner: Micheal Moore - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 31, 2004 - Departed: SDF, Louisville, KY - Destination: BNA, NASHVILLE, TN - Airport: SDF, Standiford Field ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 53; injuries: none; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; last flight review February 9, 2003; seat: left; flight hours: 2,938 total, 1,058 in this make and model, 27 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 3 knots - Visibility: 7 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 64 °F - Altimeter: 30.10 inHg - Observed at: SDF ## 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 20040904019519A](https://openairdocs.org/incident/20040904019519A), Sep 4, 2004: Beech 95A55, Louisville, KY, Substantial damage. (-23) Aircraft fuel had spilled fuel on the left wing. During the #1 left engine start the left wing exploded and caught fire. The FBO av center employee… 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.