Allegiant MD83 near Dayton on Mar 19th 2017, engine fire
Last Update: March 30, 2018 / 13:02:56 GMT/Zulu time
Incident Facts
Date of incident
Mar 19, 2017
Classification
Incident
Cause
Engine fire
Airline
Allegiant Air
Flight number
G4-636
Departure
Orlando Sanford, United States
Destination
Dayton, United States
Aircraft Registration
N881GA
Aircraft Type
McDonnell Douglas MD-83
ICAO Type Designator
MD83
A post flight examination revealed evidence of fire/heat near the engine driven generator.
The aircraft remained on the ground for 5 days 6 hours, then resumed service.
On Mar 28th 2017 the NTSB reported that the crew received a #2 engine fire indication. The crew completed the relevant checklists, shut the engine down, discharged both fire bottles and made an uneventful single engine landing at Dayton. Emergency services determined that the fire had been extinguished and the aircraft taxied to the apron on own power. The occurrence was rated an incident and is being investigated by the NTSB, NTSB investigators have travelled on site.
On Mar 30th 2018 the NTSB reported significant thermal damage in the bottom half of the engine concentrated around the constant speed drive (CSD) and generator. A section of the generator case was fractured and missing. The CSD to oil-cooler return line was severed. Oil pooling and metal debris were observed at the 6 o'clock position of the engine. The FDR permitted to conclude the failure was isolated to the CSD or generator. The CSD was disassembled, all bearings and gears were intact. The generator was also disassembled, all rotating parts of the generator showed severe thermal damage and deformation, the generator's main rotor and copper windings had separated. The generator failure was rated uncontained.
The NTSB reported: "A record of uncontained generator failures on Douglas Aircraft DC-9/ McDonnell Douglas MD-80 series airplanes was requested from UTC Aerospace Systems and Boeing. Eleven prior uncontained generator failure events were reported since the year 2000." However, none of those events had caused an uncontrolled fire.
The NTSB added: "Following the events in 2010, Boeing provided the NTSB with a safety risk assessment. According to the assessment, any fragments released by an uncontained generator failure are low energy projectiles and do not pose a threat to the airframe. The assessment also states that design features including overboard drains, fire detection and extinguishing systems are in place to mitigate the risks associated with flammable fluid leaks in a designated fire zone."
Incident Facts
Date of incident
Mar 19, 2017
Classification
Incident
Cause
Engine fire
Airline
Allegiant Air
Flight number
G4-636
Departure
Orlando Sanford, United States
Destination
Dayton, United States
Aircraft Registration
N881GA
Aircraft Type
McDonnell Douglas MD-83
ICAO Type Designator
MD83
This article is published under license from Avherald.com. © of text by Avherald.com.
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