Boeing 767-232 N111DN
6 December 1999 · Salt Lake City, Utah, United States · No injuries
Summary
On 6 December 1999 at about 23:55 local time, a Boeing 767-232 registered N111DN was involved in an incident near Salt Lake City, Utah, United States. 85 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 23:55
- Classification
- Incident
- Location
- Salt Lake City, Utah, United States
- Coordinates
- Not recorded
- Aircraft
- Boeing 767-232
- Registration
- N111DN
- Category
- Airplane
- Engines
- 2
- Operator
- Not recorded
- Operating rule
- Part 121: Air Carrier
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Unknown → Dallas-Ft Worth
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- DEN00IA023
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 85 | 0 | 0 | 0 | 85 |
Probable cause
Total failure of the main landing gear retract actuator due to stress corrosion caused by the use of a faulty sealant by company maintenance personnel that allowed moisture to enter the joint. A factor was the use of an improper fillet seal.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The crew heard a loud noise and felt a vibration when the landing gear was retracted after takeoff. An emergency was declared, and the flight returned to Salt Lake City. When the landing gear was lowered, the nose and right main landing gear DOWN AND LOCKED lights illuminated, but a GEAR UNSAFE light illuminated for the left main landing gear. Following a low pass over the airport, maintenance personnel advised the landing gear appeared to be down and locked. An uneventful landing was made. Maintenance personnel informed the crew that the landing gear actuator had sheared and could not be pinned for towing. The part was later removed and examined. Stress corrosion cracking had occurred through 75% of the piston, followed by ductile separation. The corrosion had formed when a faulty fillet seal around the base of the rod end allowed moisture to enter the joint. The retract actuator was an original part, but it was determined that it had previously been reworked.
Quoted verbatim from the NTSB record.
Other Boeing 767 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 31 Oct 1999 | Boeing 767-366-ER | Atlantic Ocean | - | Fatal | 217 |
| 27 Sep 1999 | Boeing 767-332 | Atlanta, Georgia, United States | - | Serious injuries | - |
| 29 Jun 1999 | Boeing 767-323 | Chicago, Illinois, United States | - | No injuries | - |
| 24 Aug 1999 | Boeing 767 | Copenhagen, Denmark | SAS | No injuries | - |
| 21 Nov 1999 | Boeing 767-200 | Jamaica, New York, United States | - | No injuries | - |
| 15 Jan 1999 | Boeing 767-300 | London, United Kingdom | American Airlines | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 17 Aug 1999 | Piper PA-28-181 | Tooele, Utah, United States | Proflight | No injuries | - |
| 24 Dec 1999 | Boeing 737-347 | Salt Lake City, Utah, United States | Delta Airlines | No injuries | - |
| 16 Jul 1999 | Cessna T210M | Cedar City, Utah, United States | Gary G. Sackett | No injuries | - |
| 22 Aug 1999 | Cessna 180 | Heber City, Utah, United States | - | No injuries | - |
| 18 Sep 1999 | Cessna 152 | Murray, Utah, United States | Edith E. Steele | No injuries | - |
| 2 Nov 1999 | Piper PA-18-150 | Bullfrog, Utah, United States | James M. Elegante | No injuries | - |