LAX88LA198

NTSB accident investigation · Enstrom F28A · La Verne, CA · May 27, 1988

Accident · No injuriesLimited investigationFinal report
Date
May 27, 1988, 11:30 local (18:30 UTC)
Place
La Verne, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N4898Enstrom F28A
Weather
Visual (VMC) · Day
Status
Completed · report January 4, 1990
Report
Approved by Office Director
FAA report
19880527016509A
Case key
26011

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.

Hard landingLanding - flare/touchdown
Autorotation - prematureDual studentFactor
Object - fence
Proper glidepath - misjudgedDual studentFactor
Supervision - inadequatePilot in command(cfi)Cause
Collective - improperPilot in command(cfi)Cause
Adequate rotor rpm - not maintainedPilot in command(cfi)Cause
Remedial action - delayedPilot in command(cfi)Cause

Analysis

The helicopter landed hard during a practice touchdown autorotation (auto). The helo remained in closed traffic for the purpose of practicing touchdown autos to a landing area adjacent to the aprt's rwy. There was also another helo in closed traffic using the landing area for the same purpose. The other helo was landing long in the area allowing the accident helo to use the first half. The pvt plt initiated the auto. The CFI then took command of the helo because he felt they would not clear a perimeter fence located short of the intended touchdown point. The CFI then applied collective pitch to extend the glide over the fence. The private plt indicated that the rotor RPM was depleted and the CFI did not flare the helo sufficiently to regain rotor RPM or decrease the ground speed. The helo landed hard and bounced. Neither the private plt nor the CFI reported any mechanical failures or malfunctions.

Aircraft

Registration
N4898
Reported as
Enstrom F28A
Category
Helicopter
Serial number
055
Airframe hours
13,554
Engine
Lycoming HI0-360-CIA, 205 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Hiser Helicopter
Registered owner
Hiser Helicopters
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 30, 1988 · 90 hours before
Airport
POC · Brackett Field

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
25
Certificates
Flight instructor, Commercial
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
1,260 total · 150 in this make and model · 1,220 as pilot in command · 250 in the last 90 days · 100 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
4 statute miles
Lowest ceiling
2,300 ft broken
Altimeter
29.00 inHg
Observed at
POC

FAA reports on this event · 1

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