ATL86LA179

NTSB accident investigation · Andrew D. Moore HP-18 · Chester, SC · June 21, 1986

Accident · Serious injuriesLimited investigationFinal report
Date
June 21, 1986, 13:05 local (17:05 UTC)
Place
Chester, SC
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N9700PAndrew D. Moore HP-18
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860621027129A
Case key
7136

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/malfunctionApproach - vfr pattern - final approach
Flight control,flap attachment - failure,totalCause
Loss of control - in flightApproach - vfr pattern - final approach
Flt control syst,wing flap control - asymmetrical
Maintenance,modification - improperOther maintenance personnelCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot related that while turning from base to final he heard a loud bang from the left side of the aircraft. The aircraft entered a steep left turn and crashed left of final approach course. Post crash examination of the aircraft revealed that the flap disengaged from the flap drive unit resulting in a split flap condition. The flaps had been modified with the use of pop rivets at the attach points.

Aircraft

Registration
N9700P
Reported as
Andrew D. Moore HP-18
Category
Glider, amateur-built
Serial number
18-162
Airframe hours
200
Engine
unknown UNK, unknown
Damage
Substantial damage
Flight
Personal · Part 91
Operator
William P. Davis
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · April 22, 1986
Airport
9A6 · Chester Muni, runway 35, 5,000 × 100 ft, asphalt

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
49
Certificate
Private
Seat
Front
Flight hours
127 total · 127 in this make and model · 127 as pilot in command · 10 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
15 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point -0 °F

FAA reports on this event · 1

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