LAX87LA287

NTSB accident investigation · Burkhart Grob G-103A · Maricopa, AZ · July 13, 1987

Accident · Minor injuriesLimited investigationFinal report
Date
July 13, 1987, 15:30 local (22:30 UTC)
Place
Maricopa, AZ
Injuries
2 minor
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N103BGBurkhart Grob G-103A
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 1989
Report
Approved by Office Director
Case key
25654

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.

In flight collision with objectManeuvering
In-flight planning/decision - improperPilot in commandCause
Weather condition - turbulenceFactor
Weather condition - downdraftFactor
Object - tree(s)Factor
Clearance - misjudgedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The plt rprtd that after gliding in a sink for svrl minutes, he began flying about 500' above a north-south mtn ridge in search of lift. While on a northerly heading, the left wing rose & the plt interpreted this as lift. He turned to the left (west) which put the glider on the lee side of the ridge. The glider then entered a sink & went below the ridge line. The plt traded alt for speed as he headed toward the sailport. Rprtdly, the glider was traveling at about 100 KTS when a wing hit a tall (tree like) cactus & then the glider crashed. About 15 mi away at phoenix, the wind was from 120 deg at 6 KTS.

Aircraft

Registration
N103BG
Reported as
Burkhart Grob G-103A
Category
Glider
Serial number
33954 K-187
Airframe hours
1,912
Engine
unknown
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Arizona Soaring Inc.
Airworthiness certificate
Standard, Aerobatic; Standard, Normal
Last inspection
100 hour · July 16, 1987 · 20 hours before
Departed
E68 · Maricopa, AZ
Airport
E-68 · Estrella Sailport

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
34
Certificate
Private
Seat
Front
Flight hours
103 total · 76 in this make and model · 67 as pilot in command · 28 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 6 knots
Visibility
50 statute miles
Lowest ceiling
None
Temperature
102 °F, dew point 63 °F
Altimeter
29.00 inHg
Observed at
PHX, 15 nm away