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Air carrier mechanic observing a 4-ENGINE freighter taking off at night at dfw noted that the engines exhaust flame as viewed through the mercury vapor lights at the terminal caused the exhaust flame to appear exaggerated as though the engine was on fire.
| Attributes | |
| ACN | 159804 |
| Time | |
| Date | 199010 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Heavy Transport, Low Wing, 4 Turbojet Eng |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 159804 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Possible solution to the claim made by witnesses of an airline accident, that the engine or engines were on fire prior to the accident. I was watching our company aircraft takeoff on 17L at dfw one night and as the aircraft made its takeoff run down the runway the mercury vapor lights (by the terminal) shining through the high velocity, high temperature engine exhaust gave the engines the appearance of being on fire as the aircraft passed by each mercury vapor light while it was on the ground and just after takeoff.
Original NASA ASRS Text
Title: ACR MECHANIC OBSERVING A 4-ENGINE FREIGHTER TAKING OFF AT NIGHT AT DFW NOTED THAT THE ENGINES EXHAUST FLAME AS VIEWED THROUGH THE MERCURY VAPOR LIGHTS AT THE TERMINAL CAUSED THE EXHAUST FLAME TO APPEAR EXAGGERATED AS THOUGH THE ENGINE WAS ON FIRE.
Narrative: POSSIBLE SOLUTION TO THE CLAIM MADE BY WITNESSES OF AN AIRLINE ACCIDENT, THAT THE ENG OR ENGS WERE ON FIRE PRIOR TO THE ACCIDENT. I WAS WATCHING OUR COMPANY ACFT TKOF ON 17L AT DFW ONE NIGHT AND AS THE ACFT MADE ITS TKOF RUN DOWN THE RWY THE MERCURY VAPOR LIGHTS (BY THE TERMINAL) SHINING THROUGH THE HIGH VELOCITY, HIGH TEMP ENG EXHAUST GAVE THE ENGS THE APPEARANCE OF BEING ON FIRE AS THE ACFT PASSED BY EACH MERCURY VAPOR LIGHT WHILE IT WAS ON THE GND AND JUST AFTER TKOF.
Data retrieved from NASA's ASRS site as of July 2007 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.