- Date
- February 14, 1990, 18:50 local (Feb 15, 1990, 01:50 UTC)
- Place
- Everett, WA
- Injuries
- 7 uninjured
- Damage
- Minor damage
- Phase of flight
- Landing
- Aircraft
- UNREGBoeing 747-446B
- Weather
- Visual (VMC) · Night/dark
- Status
- Completed · report December 30, 1992
- Report
- Approved by Office Director
- Case key
- 41132
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
A break from pre-existing intergranular cracks which led to a fracture.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
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.
Aircraft
- Registration
- UNREG
- Reported as
- Boeing 747-446B
- Category
- Airplane
- Engine
- GE CF6-80C2B1F, turbo fan
- Damage
- Minor damage
- Flight
- Part 91
- Registered owner
- Boeing Commercial Airplanes
- Airworthiness certificate
- Special, Special flight (Special)
- Departed
- MWH · Moses Lake, WA
- Flight plan
- IFR
- Airport
- PAE · Paine Fld, runway 16R, 9,010 × 150 ft, asphalt
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 54
- Certificates
- Commercial, Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land, Single-engine sea, Multi-engine sea
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Right
- Flight hours
- 11,482 total · 228 in this make and model · 6,091 as pilot in command · 46 in the last 90 days · 17 in the last 30 days · 5 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/dark
- Wind
- 120° at 12 knots
- Visibility
- 25 statute miles
- Lowest ceiling
- 6,000 ft broken
- Temperature
- 30 °F, dew point 19 °F
- Altimeter
- 30.00 inHg