Fokker F28-MK-0100 N867US
7 May 1993 · Pittsburgh, Pennsylvania, United States · Minor injuries
Summary
On 7 May 1993 at about 16:51 local time, a Fokker F28-MK-0100 registered N867US, operated by Usair, was involved in an incident near Pittsburgh, Pennsylvania, United States. 51 people were on board and one had minor injuries. 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 16:51
- Classification
- Incident
- Location
- Pittsburgh, Pennsylvania, United States
- Nearest airport
- Greater Pittsburgh (PIT)
- Coordinates
- Not recorded
- Aircraft
- Fokker F28-MK-0100
- Registration
- N867US
- Category
- Airplane
- Engines
- 2
- Operator
- Usair
- Operating rule
- Part 121: Air Carrier
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Memphis → Unknown
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- BFO93IA070
People
1 person had minor injuries.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 51 | 0 | 0 | 1 | 50 |
Probable cause
THE IMPROPER INSTALLATION OF THE SPACERS BY THE MECHANIC AND THE UNCLEAR INFORMATION SUPPLIED FROM THE MANUFACTURER AND OPERATOR REGARDING THE INSTALLATION OF THE SPACERS.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
SHORTLY AFTER TOUCHDOWN AT MEMPHIS, TN, A SEVERE VIBRATION WAS FELT BY THE FLIGHTCREW IN THE COCKPIT. THE FLIGHTCREW THOUGHT THE VIBRATION WAS GENERATED BY THE RIGHT MAIN GEAR SO THEY HAD MAINTENANCE PERSONNEL CHECK THE RIGHT MAIN GEAR. NO ANOMALIES WERE NOTED. THE FLIGHT CONTINUED TO PITTSBURGH, PA, AND SHORTLY AFTER TOUCHDOWN, THE LEFT MAIN GEAR COLLAPSED. POST INCIDENT EXAMINATION OF THE LEFT MAIN GEAR REVEALED THAT TWO SPACERS IN THE TORQUE LINK ASSEMBLY WERE FOUND TO HAVE BEEN IMPROPERLY INSTALLED. THE INVESTIGATION ALSO REVEALED THAT DURING RE INSTALLATION OF THE TORQUE LINKS AND SHIMMY DAMPER AT THE LAST MAINTENANCE CHECK, THE TWO SPACERS WERE INSTALLED IN REVERSE OF THEIR NORMAL POSITIONS. ACCORDING TO FOKKER, REVERSAL OF THE TWO SPACERS WOULD RESULT IN AN UNDAMPED FREE PLAY BETWEEN THE UPPER AND LOWER TORQUE LINK RESULTING IN OSCILLATIONS IN THE LATERAL MODE OF THE LANDING GEAR. REVIEW OF USAIR'S AIRCRAFT MAINTENANCE MANUAL, SUPPLIED BY FOKKER, REVEALED THAT THE TWO SPACERS THAT WERE INCORRECTLY INSTALLED ON THE INCIDENT AIRPLANE WERE NOT DESCRIBED BY DIMENSIONS OR VERBIAGE.
Quoted verbatim from the NTSB record.
Other Fokker F28 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 22 Jun 1992 | Fokker F.28 MK 1000 | Portland, Oregon, United States | Timeair Inc. | No injuries | - |
| 1 May 1994 | Fokker F28 MK 0100 | Charlotte, North Carolina, United States | Usair, Inc. | No injuries | - |
| 15 Apr 1992 | Fokker F.28 MK4000 | Charlotte, North Carolina, United States | Usair | No injuries | - |
| 1 Feb 1994 | Fokker F28 MK O100 | Amarillo, Texas, United States | - | No injuries | - |
| 4 Mar 1995 | Fokker F28-4000 | Huntington, West Virginia, United States | - | No injuries | - |
| 11 Nov 1990 | Fokker F28 MK0100 | Atlanta, Georgia, United States | Usair | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 2 Sep 1993 | Piper PA-28-161 | Centre Hall, Pennsylvania, United States | Air Atlantic Airlines | No injuries | - |
| 8 May 1993 | Cessna 172 | Towanda, Pennsylvania, United States | Glenn E. Murphy | Serious injuries | - |
| 6 Sep 1993 | Schweizer SGS2-33A | Eighty Four, Pennsylvania, United States | PGH Soaring Club Inc. | No injuries | - |
| 6 Sep 1993 | Sterner SUPER CAT | Cherryville, Pennsylvania, United States | Kerry John Sterner | No injuries | - |
| 8 Sep 1993 | Cessna 402B | Eau Claire, Pennsylvania, United States | Freight Runners Express Inc. | No injuries | - |
| 1 May 1993 | McMillin FISHER 404 | Wampum, Pennsylvania, United States | James McMillin | No injuries | - |