LAX84FA371

NTSB accident investigation · Hughes 269B · Palos Verde Est, CA · June 28, 1984

Accident · FatalField investigationFinal report
Date
June 28, 1984, 13:19 local (20:19 UTC)
Place
Palos Verde Est, CA
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N9400FHughes 269B
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19840628027589A
Case key
23969

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionManeuvering
Rotor system,tail rotor blade - failure,totalCause
Rotor system,tail rotor hub counterweight - separationCause
Rotor system,tail rotor hub - separationCause
Rotor system,tail rotor hub pitch link - overloadCause
Maintenance,compliance with ad - inadequateOther maintenance personnelCause
Information insufficientOther maintenance personnelCause
Insufficient standards/requirements,manufacturerManufacturerCause
Loss of control - in flightManeuvering
In flight collision with terrain/waterDescent - uncontrolled
Procedures/directives - improperPilot in commandCause
Lack of recent experiencePilot in commandCause
Autorotation - not performedPilot in commandCause

Analysis

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.

Aircraft

Registration
N9400F
Reported as
Hughes 269B
Category
Helicopter
Serial number
124-0145
Airframe hours
4,246
Engine
Lycoming HIO-360-A1A, 180 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
The Geradin Corp.
Airworthiness certificate
Standard, Normal
Last inspection
Unknown · May 28, 1984 · 24 hours before
Departed
TOA · Torrance, CA
Airport
TOA · Torrance

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
26
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 12 knots
Visibility
7 statute miles
Lowest ceiling
None
Altimeter
29.00 inHg
Observed at
TOA, 5 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N9400F · 1

Matched to the same aircraft by N-number and date.