ASN Wikibase Occurrence # 217245
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| Date: | Sunday 20 September 1992 |
| Time: | 19:53 |
| Type: |  Lockheed L-1011-385 TriStar |
| Owner/operator: | Delta Air Lines |
| Registration: | N786DL |
| MSN: | 1123 |
| Total airframe hrs: | 39472 hours |
| Fatalities: | Fatalities: 0 / Occupants: 315 |
| Aircraft damage: | Minor |
| Category: | Accident |
| Location: | Boston-Logan International Airport, MA (BOS/KBOS) -
 United States of America
|
| Phase: | Approach |
| Nature: | Passenger - Scheduled |
| Departure airport: | Atlanta Hartsfield Jackson International Airport, GA (ATL/KATL) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Probable Cause: INADEQUATE LUBRICATION WHICH CAUSED STRESS CORROSION CRACKING AND THE SEPARATION OF THE RIGHT WING NUMBER TWO FLAP VANE.
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001211X15610&key=1
Accident investigation:
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Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Nov-2018 08:43 | ASN Update Bot | Added |
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