Serious incident Boeing 747-251F (SCD) N629US, Saturday 25 September 1993
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Date:Saturday 25 September 1993
Time:09:35 LT
Type:Silhouette image of generic B742 model; specific model in this crash may look slightly different    
Boeing 747-251F (SCD)
Owner/operator:Northwest Airlines
Registration: N629US
MSN: 22388/444
Engine model:P&W JT9-D7F
Fatalities:Fatalities: 0 / Occupants: 3
Other fatalities:0
Aircraft damage: Minor
Category:Serious incident
Location:Anchorage, AK -   United States of America
Phase: Take off
Nature:Unknown
Departure airport:
Destination airport:(KNRT)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
A 28 OUNCE DUCK WAS INGESTED INTO A JT9 TURBOFAN ENGINE OF A B747 ON TAKEOFF, IMPACTING AND BREAKING THE 10 PLY FIBERGLASS FAN SPINNER. DOWNSTREAM ENGINE DESTRUCTION FOLLOWED. ENGINE MANUFACTURE AND FAA WAS AWARE OF A NUMBER OF PREVIOUS BIRD-STRIKE FAILURES WITH THIS SPINNER. NEW AND STRONGER 20 PLY SPINNERS ARE BEING PHASED IN; HOWEVER, THIN SPINNERS ARE STILL IN USE ON JT9 ENGINES IN COMMERCIAL SERVICE.

Probable Cause: FOREIGN OBJECT DAMAGE TO THE COMPRESSOR FORWARD FAN ASSEMBLY AS A RESULT OF THE INGESTION OF A BIRD.

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: ANC93IA188
Status: Investigation completed
Duration: 1 year and 2 months
Download report: Final report

Sources:

NTSB ANC93IA188

History of this aircraft

Other occurrences involving this aircraft

15 October 2000 N629US Northwest Airlines 0 Anchorage, AK min

Location

Revision history:

Date/timeContributorUpdates
16-Mar-2024 16:17 ASN Update Bot Added

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