ASN Wikibase Occurrence # 40798
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| Date: | Thursday 28 June 1984 |
| Time: | 13:19 |
| Type: |  Hughes 269B |
| Owner/operator: | The Geradin |
| Registration: | N9400F |
| MSN: | 124-0145 |
| Total airframe hrs: | 4246 hours |
| Engine model: | LYCOMING HIO-360-A1A |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Palos Verde Est, CA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Torrance, CA (TOA) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
GND WITNESSES OBSVD HELICOPTER INTO NORMAL TURN AT 500 FT AGL FOLLOWED BY A VIOLENT RT TURN. DURING THE VIOLENT TURN THE TAIL ROTOR ASSY SEPARATED & THE MAIN ROTOR BLADES CONED UPWARDS. THE HELICOPTER WENT INTO A NEAR VERTICAL DESCENT & CRASHED. WRECKAGE EXAM DISCLOSE THE TAIL ROTOR HUB TEETERING FORK BOLT & BOTH PITCH CHG LNKS SUSTAINED OVLD FRACTURES. THE FORK ASSY SHOWED EXTENSIVE BLADE IMPACT MARKS. BOTH TAIL ROTOR BLADES TRAIL EDGES EXHIBITED ABRASIVE SIGNATURES & WERE DELAMINATED. THE TAIL SKID SEPARATED & WAS FRACTURED @ MIDSPAN & ITS LT SIDE SHOWED TAIL ROTOR BLADE RUB MARKS. METAL & CHEM ANALYSIS DISCLSD THE EPOXY BONDING MATERIAL WAS WEAKENED BY A FOREIGN SUBSTANCE. BOTH TAIL ROTOR BLADES WERE XRAYED AND PAINTED 25 FLT HRS PRIOR TO THE ACCIDENT. NO EVIDENCE WAS FOUND TO INDICATE THE PILOT HAD FLOWN A HELICOPTER WITHIN 11 MONTHS PRECEDING THE ACCIDENT. THE PLT HAD ACCUMULATED 50 HELICOPTER FLT HRS, 15 OF WHICH WERE AS PIC. CAUSE:
Sources:
NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X39978
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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