ASN Wikibase Occurrence # 55982
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| Date: | Friday 26 December 2008 |
| Time: | 08:59 |
| Type: |  Mcdonnell Douglas MD-83 |
| Owner/operator: | American Airlines |
| Registration: | N9617R |
| MSN: | 53564/2199 |
| Year of manufacture: | 1997 |
| Engine model: | P & W JT8D SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 129 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Los Angeles International Airport, CA (LAX/KLAX) -
 United States of America
|
| Phase: | Pushback / towing |
| Nature: | Passenger - Scheduled |
| Departure airport: | Los Angeles International Airport, CA (LAX/KLAX) |
| Dallas/Ft Worth, TX (DFW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The first officer indicated that he advanced the left engine throttle during the airplane's taxi in order to clear what he suspected was a stuck bleed air valve. Although he suspected that he had only moved the throttle "about an inch", FDR data revealed it had been advanced to and remained at an extremely high power setting for approximately 28 seconds. This action, which occurred without the knowledge of the captain or the tug operator and without application of the parking brakes, resulted in a substantial increase in thrust that overwhelmed the tug's resistance until the airplane impacted the tug.
Probable Cause:
The first officer's unannounced advancement of the left engine throttle, which led to a sustained application of high thrust that caused the airplane to impact the tug.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Dec-2008 09:48 | harro | Updated |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 03-Dec-2017 12:12 | ASN Update Bot | Updated [Operator, Total fatalities, Total occupants, Departure airport, Destination airport, Source, Narrative] |
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