Boeing 747-446B UNREG
15 February 1990 · Everett, Washington, United States · No injuries
Summary
On 15 February 1990 at about 01:50 local time, a Boeing 747-446B registered UNREG was involved in an incident near Everett, Washington, United States. 7 people were on board and nobody was injured. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 01:50
- Classification
- Incident
- Location
- Everett, Washington, United States
- Nearest airport
- Paine Fld (PAE)
- Coordinates
- 47.9796, -122.2000
- Aircraft
- Boeing 747-446B
- Registration
- UNREG
- Category
- Airplane
- Engines
- 4
- Operator
- Not recorded
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Moses Lake → Unknown
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Night/Dark
- NTSB number
- SEA90IA042
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 7 | 0 | 0 | 0 | 7 |
Probable cause
A BREAK FROM PRE-EXISTING INTERGRANULAR CRACKS WHICH LED TO A FRACTURE.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
DURING THE LANDING ROLL, AT THE END OF A FLIGHT, THE PILOT REPORTED THAT THE EICAS DISPLAYED A CAUTION MESSAGE OF HYDRAULIC PRESSURE AND QUANTITY AND GEAR DOOR. THE PILOT ALSO NOTED THAT THE AIRPLANE WAS LISTING TO THE RIGHT. IT WAS LATER FOUND THAT THE RIGHT WING LANDING GEAR, OUTER CYLINDER AFT TRUNNION ARM BROKE. THE PART WAS METALLURGICALLY TESTED AND FOUND THAT THE TRUNNION FRACTURED AS A RESULT OF PRE-EXISTING INTERGRANULAR CRACKS.
Quoted verbatim from the NTSB record.
Other Boeing 747 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 10 Jan 1990 | Boeing 747-151 | Detroit, Michigan, United States | Northwest Airlines, Inc. | No injuries | - |
| 14 Jul 1990 | Boeing 747-136 | Miami, Florida, United States | British Airways | Serious injuries | - |
| 27 Aug 1990 | Boeing 747-422 | Los Angeles, California, United States | United Airlines | Minor injuries | - |
| 16 Jun 1990 | Boeing 747-230 | Jamaica, New York, United States | - | No injuries | - |
| 8 May 1989 | Boeing 747 | Los Angeles, California, United States | Air New Zealand | Minor injuries | - |
| 16 Jun 1991 | Boeing 747-400 | Philadelphia, Pennsylvania, United States | KLM Royal Dutch Airline | Serious injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 9 Jan 1990 | Cessna 177B | Friday Harbor, Washington, United States | - | No injuries | - |
| 4 Feb 1990 | Bell 206B | Winthrop, Washington, United States | - | No injuries | - |
| 1 Mar 1990 | Bell BH-47G3B2 | Des Moines, Washington, United States | Richard H. Butz | Minor injuries | - |
| 25 Feb 1990 | Cessna 140 | Vancouver, Washington, United States | Bogar, Floyd | No injuries | - |
| 12 Mar 1990 | Cessna 150J | Graham, Washington, United States | - | No injuries | - |
| 12 Mar 1990 | Bell 206 | Cougar, Washington, United States | Bluebird Helicopter | No injuries | - |