ASN Wikibase Occurrence # 368236
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Date: | Wednesday 9 August 1989 |
Time: | 19:18 LT |
Type: | McDonnell Douglas DC-10-40 |
Owner/operator: | Northwest Airlines |
Registration: | N133JC |
MSN: | 46752/53 |
Engine model: | P&W JT9D-20J |
Fatalities: | Fatalities: 0 / Occupants: 254 |
Aircraft damage: | Minor |
Category: | Serious incident |
Location: | Denver, CO -
United States of America
|
Phase: | En route |
Nature: | Passenger - Scheduled |
Departure airport: | Los Angeles International Airport, CA (LAX/KLAX) |
Destination airport: | Minneapolis-St. Paul International Airport, MN (MSP/KMSP) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:WHILE CLIMBING THROUGH 38,000 FEET, THE AIRCRAFT EXPERIENCED AN UNCONTAINED FAN BLADE SEPARATION IN THE NO. 2 ENGINE. INVESTIGATION REVEALED THAT ONE OF THE FIRST-STAGE COMPRESSOR FAN BLADES (S/N EB2506) HAD SEPARATED ABOUT 8 INCHES ABOVE THE BLADE PLATFORM. FRAGMENTS FROM THE BLADE (#8) HAD EXITED THROUGH THE LEFT FAN COWL IN THREE PLACES AND HAD PENETRATED THE VERTICAL STABILIZER. THE BLADE SEPARATION STEMMED FROM A 0.34-INCH LONG FATIGUE CRACK THAT BEGAN IN A WELD ADJACENT TO A PATCH. THE FAN BLADE HAD BEEN PATCH-REPAIRED EARLIER, AND SUBJECTED TO FOUR NON-DESTRUCTIVE TESTS: X-RAY, FLUORESCENT PENETRANT, ULTRASONIC, AND EDDY CURRENT.
Probable Cause: FATIGUE FAILURE AND SEPARATION OF A FIRST-STAGE COMPRESSOR FAN BLADE.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | DCA89IA066 |
Status: | Investigation completed |
Duration: | 3 years and 2 months |
Download report: | Final report |
|
Sources:
NTSB DCA89IA066
History of this aircraft
Other occurrences involving this aircraft
31 January 1981 |
N143US |
Northwest Airlines |
0 |
near Washington-Dulles International Airport, DC (IAD/KIAD) |
|
min |
Engine failure |
Revision history:
Date/time | Contributor | Updates |
23-Mar-2024 16:11 |
ASN Update Bot |
Added |
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