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NTSB Report
June 11, 1985 · Lockheed L-1011 · N31013
St. Louis, MO
Overview
Report Status
Preliminary report
Event Type
Incident
Date
June 11, 1985
Injury Outcomes
No injuries (219 uninjured)
Location
St. Louis, MO
Aircraft
Lockheed L-1011
Tail Number
N31013
Injuries
None
Aircraft Damage
Minor
NTSB Number
MKC85IA131
WHILE ON AN IFR APPROACH TO LAND AT STL AND THE PLT INITIATED FLAPS. THE NO.3 OUTBOARD FLAP VANE SEPARATED FROM ITS MOUNTING AND FELL TO THE GROUND. UPON SEPARATION THE FLAP VANE STRUCK THE LEADING EDGE OF THE TRAILING EDGE FLAP KNOCKING A HOLE IN THE SKIN. THE SUBSEQUENT LANDING WAS UNEVENTFUL. EXAMINATION OF THE FLAP VANE ATTACH FITTING REVEALED IT FAILED IN FATIGUE FOLLOWED BY AN OVERLOAD SEPARATION. THERE HAVE BEEN 14 RECORDED CASES OF FAILURE OF THE FLAP VANE ATTACH FITTINGS WITH 9 REPORTED SEPARATIONS FROM THE AIRCRAFT.
Full Narrative
WHILE ON AN IFR APPROACH TO LAND AT STL AND THE PLT INITIATED FLAPS. THE NO.3 OUTBOARD FLAP VANE SEPARATED FROM ITS MOUNTING AND FELL TO THE GROUND. UPON SEPARATION THE FLAP VANE STRUCK THE LEADING EDGE OF THE TRAILING EDGE FLAP KNOCKING A HOLE IN THE SKIN. THE SUBSEQUENT LANDING WAS UNEVENTFUL. EXAMINATION OF THE FLAP VANE ATTACH FITTING REVEALED IT FAILED IN FATIGUE FOLLOWED BY AN OVERLOAD SEPARATION. THERE HAVE BEEN 14 RECORDED CASES OF FAILURE OF THE FLAP VANE ATTACH FITTINGS WITH 9 REPORTED SEPARATIONS FROM THE AIRCRAFT.
Flight
Event TypeIncident
Event Time11:04 CDT
Nearest AirportSt. Louis (0nm N)
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireIflt
Aircraft ExplosionNo
Aircraft
AircraftLockheed L-1011
Tail NumberN31013
Aircraft CategoryAir
DamageMinor
Operating RulePart 121
Engines3
Engine TypeTurbofan
Engine DetailsRolls-Royce · RB-211-22 · Turbofan · 45000
Seats270
People & Injuries
Injury SummaryNo injuries (219 uninjured)
Fatal0
Serious0
Minor0
Uninjured219
Total219
Crew 1Unknown
Conditions
ConditionsIMC
LightDaylight
Wind270° @ 11 kt
Visibility25 sm
CeilingOvercast 700 ft
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Observation Time17:18
Weather SourceWFAC