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NTSB Report
January 11, 1983 · Bell 222 · N23021
Houston, TX
Overview
Report Status
Preliminary report
Event Type
Incident
Date
January 11, 1983
Injury Outcomes
No injuries (6 uninjured)
Location
Houston, TX
Aircraft
Bell 222
Tail Number
N23021
Operator
Executive Airlink
Injuries
None
NTSB Number
FTW83IA084
THE HELICOPTER DEVELOPED A SEVERE VIBRATION WHILE IN FLT. THE PILOT EXECUTED AN EMERGENCY LANDING WITH NO FURTHER ACFT DAMAGE. AN EXAMINATION OF THE ACFT REVEALED THAT THE WALKING BEAM ASSEMBLY LOCATED BETWEEN THE SWASH PLATE AND ROTOR PITCH LINK HAD FAILED. FRACTURING ORIGINATED AT A CORROSION PIT ON A THREAD FLANK. MICROSCOPIC EXAMINATION OF THE THREADS REVEALED THAT LOCAL AREA OF CORROSION PITTING HAD OCCURRED WHERE THE SHOT PEEN BALLS HAD BEEN CONTACTING THE FLANKS OF THE THREADS.
Full Narrative
THE HELICOPTER DEVELOPED A SEVERE VIBRATION WHILE IN FLT. THE PILOT EXECUTED AN EMERGENCY LANDING WITH NO FURTHER ACFT DAMAGE. AN EXAMINATION OF THE ACFT REVEALED THAT THE WALKING BEAM ASSEMBLY LOCATED BETWEEN THE SWASH PLATE AND ROTOR PITCH LINK HAD FAILED. FRACTURING ORIGINATED AT A CORROSION PIT ON A THREAD FLANK. MICROSCOPIC EXAMINATION OF THE THREADS REVEALED THAT LOCAL AREA OF CORROSION PITTING HAD OCCURRED WHERE THE SHOT PEEN BALLS HAD BEEN CONTACTING THE FLANKS OF THE THREADS.
Flight
Event TypeIncident
Event Time16:33 CST
Nearest AirportHouston Intercont. (3nm E)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 222
Tail NumberN23021
Aircraft CategoryHeli
OperatorExecutive Airlink
Operating RulePart 135
Engines2
Engine TypeTurboshaft
Engine DetailsLycoming · LTS-101-650C3 · Turboshaft · 620
Seats10
People & Injuries
Injury SummaryNo injuries (6 uninjured)
Fatal0
Serious0
Minor0
Uninjured6
Total6
Crew 1Age 34 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind300° @ 10 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point66 F / 34 C
Altimeter30.00 inHg
Observation Time21:53
Weather SourceWFAC