# NTSB FTW97IA305: Saab-Scania 340B, N313AE, Lafayette, LA, August 12, 1997 - Type: NTSB incident investigation - Classification: Incident · No injuries · Incident investigation · Final report - Date: August 11, 1997, 19:08 local (Aug 12, 1997, 00:08 UTC) - Place: Lafayette, LA - Coordinates: 30.240915, -91.990539 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=30.2409&lon=-91.9905&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 35 uninjured - Status: Completed, report February 29, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 20075 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW97IA305 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/20075/pdf - Page: https://openairdocs.org/ntsb/FTW97IA305 ## Probable cause The failure of the AC generator due to the failure of the anti-drive end bearing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, taxi - from landing - electrical system,generator - failure (cause) - generator - engine compartment - fire ## Analysis A passenger observed signs of fire coming from the number one (left) engine while the airplane was taxiing to the parking ramp. The flight attendant notified the flight crew and the captain secured both engines, stopped the airplane and ordered a ground evacuation on the taxiway. The passengers and crew deplaned through the normal exits without further incident. Examination of the left engine revealed that the fire was confined to the AC generator located on the top right side of the engine. Detailed examination of the AC generator revealed that the bearing had failed. The cause of the bearing failure could not be determined due to the extensive damage sustained by the bearing. ## Factual narrative On August 11, 1997, at 1908 central daylight time, a Saab 340B airplane, N313AE, experienced an engine fire on the left engine while taxiing to the ramp at the Lafayette Regional Airport, near Lafayette, Louisiana. The airplane, owned and operated by Wings West Airlines as American Eagle Flight 5153 was on an instrument flight plan between the DFW International Airport, Texas, and the Lafayette Regional Airport. The two airline transport rated flight crewmembers, the flight attendant, and the 32 passengers were not injured. Damage to the airplane was minor. Visual meteorological conditions prevailed for the Title 14 CFR Part 121 flight. According to the operator, the airplane had cleared the active runway and was taxiing to the ramp near Taxiways B and J, when the flight attendant notified the flight crew that a passenger observed signs of fire coming from the number 1 (left) engine. The captain secured both engines, stopped the airplane, notified the ground control of the fire and ordered a precautionary ground evacuation on the taxiway. The airport rescue and fire fighting equipment and personnel responded to the fire within two minutes. There were no reported warnings or indications of fire in the cockpit. The passengers and crew deplaned the airplane through the normal exits without further incident. Examination of the engine by the FAA inspector revealed that the fire was confined to the internal components of the AC generator located on the top right side of the engine. Damage was limited to the generator and the generator screen in the exhaust port for the AC generator. The operator reported that the engine was undamaged. Total time on the airframe was 10,364.3 hours and 11,957 cycles. The operator reported that the AC generator (part number 31342-001, serial number 1391) had accumulated a total of 9,290.3 hours and 10,747 cycles since new. The time since the last overhaul and installation was 1,097.1 hours and 1,596 cycles. The failed generator was shipped to the manufacturer for further examination and evaluation. A detailed examination of the generator revealed that the anti-drive end bearing failed resulting in subsequent rubbing and heating. The extend of the damage incurred by the bearing and other related parts precluded the manufacturer from determining the cause of the bearing failure. ## Aircraft - Registration: [N313AE](https://openairdocs.org/aircraft/N313AE), registered now, S/N 340B-313 (OpenAirDocs) - Reported make and model: Saab-Scania AB (Saab) 340B - Registry model: [Saab-Scania SAAB 340B](https://openairdocs.org/model/saab-scania-saab-340b) (registry code 7860101) (OpenAirDocs) - Registry engine: [GE CT7-SER series](https://openairdocs.org/engine/ge-ct7-ser-series) (registry code 30031, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 313AE - Airframe hours: 10364 - Engines: GE CT7-9B 1750 horsepower turbo prop - Damage: Minor damage - Fire: On-Ground - Flight: Part 121 - Registered owner: Wings West Airlines - Airworthiness certificate: Standard, Transport - Last inspection: Continuous airworthiness, June 6, 1994, 8 hours before - Departed: DFW, DFW AIRPORT, TX - Destination: LFT - Flight plan: IFR - Airport: LFT, Lafayette Regional ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 692 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 6 knots - Visibility: 15 statute miles - Lowest ceiling: 25,000 ft overcast - Temperature: 88 °F, dew point 77 °F - Observed at: LFT ## 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 19970811028019I](https://openairdocs.org/incident/19970811028019I), Aug 11, 1997: Saab 340B, Lafayette, LA. Flames left engine gen exhaust duct ac generator burned. Fire put out. Evacuated on taxiway. ## Other investigations on N313AE (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 LAX97IA180](https://openairdocs.org/ntsb/LAX97IA180), May 13, 1997: Saab-Scania 340B (N313AE), San Luis Obispo, CA, incident, no damage. Probable cause: Compressor stalls of both engines due to in-service compressor contamination. Factors in the compressor stall of the right engine were an atmospheric temperature inversion and a transient fuel flow… 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.