MIA87FA046

NTSB accident investigation · Hughes 369HS · Zephyrhills, FL · December 9, 1986

Accident · FatalField investigationFinal report
Date
December 9, 1986, 15:30 local (20:30 UTC)
Place
Zephyrhills, FL
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N8390FHughes 369HS
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19861209067029A
Case key
31740

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.

Loss of engine power(partial) - mech failure/malfCruise
Bleed air system - no pressureCause
Maintenance,modification - improperOther maintenance personnelCause
Forced landingDescent - emergency
Adequate rotor rpm - not maintainedPilot in commandCause
Autorotation - not performedPilot in commandCause
In flight collision with terrain/waterLanding
Terrain condition - ground
Roll overLanding
Fire/explosionLanding

Analysis

A witness stated that she heard the eng on the helicopter quit. She looked out her window and watched the helicopter hit the ground, bounce, hit again, flip over and the tail broke off. The helicopter then burst into flames and exploded. Exam of the eng revealed that the pc air filter assembly was broken at the forward inlet side of the filter body which resulted in the loss of pc air pressure to the fuel control. This caused the eng power to reduce to flight idle. The pc filter housing broke due to an improper modification to the filter body.

Aircraft

Registration
N8390F
Reported as
Hughes 369HS
Category
Helicopter
Serial number
860855S
Airframe hours
645
Engine
Allison 250-C20, 278 horsepower, turbo shaft
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Operator
F. M.Mc Gahee
Registered owner
Francis M. Mcgahee
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 4, 1986
Departed
Tampa, FL
Destination
Jacksonville, FL

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
68
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 1, Expired
Seat
Left
Toxicology
Performed
Flight hours
2,000 total · 20 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 8 knots
Visibility
7 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 68 °F
Altimeter
30.00 inHg
Observed at
PIE, 30 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.