Two line aircraft maintenance technicians (amt) report about an engine 'core' fire that spread very ...

Narrative:

We had to do an operational (ops) check of the AC bus control which involved the engines to be run. I; mechanic X; was outside the aircraft to clear it for start. The person in the cockpit; mechanic Y; proceeded with engine start. I soon seen flames coming from the engine which increased quickly. I motioned to mechanic Y doing engine start of fire. The fire increased and I ran for a nearby ground fire extinguisher about 50-feet away. While I was returning; I called the lead mechanic and told him to call and have fire department dispatched. When I returned the fire had worsened and it appeared to be coming from the lower cowling at this time. I motioned to the person in the cockpit to blow the fire bottles. I found out later he had no indication in cockpit of fire. He had continued to motor engine which is standard procedure and by the time I had wheeled the fire extinguisher to back of plane the engine had spooled down; but there was still a small fire inside engine. I used the ground fire extinguisher to put out the fire. After reviewing procedures manual (pm); we should of had a third person to do engine run. Engine fire during engine start up. Unknown what caused excessive fuel in engine to cause this fire. Graveyard.

Original NASA ASRS Text

Title: Two Line Aircraft Maintenance Technicians (AMT) report about an Engine 'Core' fire that spread very quickly inside the Left Engine on an MD-83 aircraft during engine runs. The fire had melted the PW-JT8D-219 engine liner. No Fire Warning Indications were noted in the cockpit during the engine fire.

Narrative: We had to do an Operational (Ops) Check of the AC Bus Control which involved the engines to be run. I; Mechanic X; was outside the aircraft to clear it for Start. The person in the cockpit; Mechanic Y; proceeded with Engine Start. I soon seen flames coming from the engine which increased quickly. I motioned to Mechanic Y doing engine start of fire. The fire increased and I ran for a nearby ground fire extinguisher about 50-feet away. While I was returning; I called the Lead Mechanic and told him to call and have Fire Department dispatched. When I returned the fire had worsened and it appeared to be coming from the lower cowling at this time. I motioned to the person in the cockpit to blow the fire bottles. I found out later he had no indication in cockpit of fire. He had continued to motor engine which is standard procedure and by the time I had wheeled the fire extinguisher to back of plane the engine had spooled down; but there was still a small fire inside engine. I used the ground fire extinguisher to put out the fire. After reviewing Procedures Manual (PM); we should of had a third person to do engine run. Engine fire during engine start up. Unknown what caused excessive fuel in engine to cause this fire. Graveyard.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1199794
Time
Date	201408
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Turbine Engine
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Person 2
Function	Technician
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Two line aircraft maintenance technicians (amt) report about an engine 'core' fire that spread very quickly inside the left engine on an md-83 aircraft during engine runs. The fire had melted the pw-JT8D-219 engine liner. No fire warning indications were noted in the cockpit during the engine fire.