Lockheed L1011-385 N786DL
20 September 1992 · Boston, Massachusetts, United States · No injuries
Summary
On 20 September 1992 at about 23:53 local time, a Lockheed L1011-385 registered N786DL, operated by Delta Airlines, was involved in an incident near Boston, Massachusetts, United States. 315 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 23:53
- Classification
- Incident
- Location
- Boston, Massachusetts, United States
- Coordinates
- Not recorded
- Aircraft
- Lockheed L1011-385
- Registration
- N786DL
- Category
- Airplane
- Engines
- 3
- Operator
- Delta Airlines
- Operating rule
- Part 121: Air Carrier
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Atlanta → Unknown
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Night/Dark
- NTSB number
- BFO92IA145
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 315 | 0 | 0 | 0 | 315 |
Probable cause
INADEQUATE LUBRICATION WHICH CAUSED STRESS CORROSION CRACKING AND THE SEPARATION OF THE RIGHT WING NUMBER TWO FLAP VANE.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE PILOT WAS LANDING ON RUNWAY 4R, WHEN ACCORDING TO THE PILOT, HE WAS ESTABLISHED ON THE GLIDE SLOPE WHEN HE FELT A VIBRATION. HE REPORTED THAT THE FLYING CHARACTERISTICS DEGRADED AND HE MADE THE NECESSARY CORRECTION SUCCESSFULLY. THERE WERE NO INDICATIONS IN THE COCKPIT OF ANY FAILURE. THE AIRPLANE TOUCHED DOWN 2 MINUTES LATER AND TAXIED TO THE GATE WITHOUT ANY FURTHER INCIDENCE. INSPECTION OF THE AIRPLANE REVEALED SEPARATION OF THE NO. 2 FLAP VANE FROM THE RIGHT WING. FURTHER TESTING BY THE NTSB LAB REVEALED THE SEPARATION OCCURRED DUE TO STRESS CORROSION AND FATIGUE CRACKING THAT INITIATED AT THE LUG BORE.
Quoted verbatim from the NTSB record.
Other Lockheed L1011 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 16 Jun 1989 | Lockheed L1011-385-1 | Jacks Creek, Tennessee, United States | - | Serious injuries | - |
| 13 Nov 1986 | Lockheed L1011 | Newark, New Jersey, United States | Delta Airlines | No injuries | - |
| 9 May 2000 | Lockheed L1011-385-1 | Maui, Hawaii, United States | - | No injuries | - |
| 5 Mar 2001 | Lockheed L1011 | Honolulu, Hawaii, United States | American Trans Air Inc | No injuries | - |
| 12 Sep 1980 | Lockheed L1011 | Nassau, Atlantic Ocean North Lat. | Delta Air Lines, Inc. | Serious injuries | - |
| 10 Oct 1980 | Lockheed L1011 | Newark, New Jersey, United States | Trans World Airlines, Inc. | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Aug 1992 | Piper PA-34-200T | Bedford, Massachusetts, United States | Edward Walter | No injuries | - |
| 22 Aug 1992 | Piper PA-32-260 | Newburyport, Massachusetts, United States | Alfred L. Moseley | Minor injuries | - |
| 22 Aug 1992 | Aerostar AX-9 | Hopkinton, Massachusetts, United States | Mario Distefano | No injuries | - |
| 13 Aug 1992 | Beechcraft 76 | Nantucket, Massachusetts, United States | John F. Mannix | Serious injuries | - |
| 19 Oct 1992 | Beechcraft 55 | Leicester, Massachusetts, United States | Robert L. Powell | Fatal | 2 |
| 15 Oct 1992 | Piper PA-38-112 | Newburyport, Massachusetts, United States | Beverly Flight Center, Inc. | No injuries | - |