LAX97LA158

NTSB accident investigation · Devendorf Glassair GL25 · Congress, AZ · April 13, 1997

Accident · FatalLimited investigationFinal report
Date
April 13, 1997, 11:54 local (18:54 UTC)
Place
Congress, AZ
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N28BDDevendorf Glassair GL25
Weather
Visual (VMC) · Day
Status
Completed · report February 28, 2000
Report
Approved by Office Director
FAA report
19970413005749A
Case key
29771

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

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Probable cause

failure of the pilot to recover from an inverted stall/spin prior to impact with the ground. The reason for the loss of control was not determined.

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 control - in flightManeuvering
Reason for occurrence undeterminedCause
Stall/spin - not correctedPilot in commandCause
Visual/aural perceptionPilot in command
Remedial action - inadequatePilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

Two witnesses, one of whom is a pilot, both stated that they observed the aircraft when it was approximately 1,000 feet agl until impact, and that it appeared to be in an inverted spin. After observing the crash site, an FAA airworthiness inspector stated that the aircraft appeared to have contacted the ground in an inverted attitude with little or no forward velocity. The postcrash examination did not disclose any preexisting flight control, fuel, or engine systems malfunctions or mismanagement. Also, the toxicological results did not disclose any impairment of the pilot.

Factual narrative

On April 13, 1997, at 1154 hours mountain standard time, a Devendorf Glassair GL25, N28BD, was destroyed when it impacted the ground in the vicinity of Congress, Arizona. The private pilot and one passenger sustained fatal injures. The flight originated at the Eagle Roost Airport, Aguilla, Arizona, on the day of the accident about 1140 hours. Visual meteorological conditions prevailed and no flight plan was filed for the local area personal flight.

Two witnesses, one of whom is a pilot, both stated that they observed the aircraft when it was approximately 1,000 feet agl until impact, and that it appeared to be in an inverted spin during that time.

An airworthiness inspector from the Scottsdale, Arizona, Flight Standards District Office, went to the accident site and examined the wreckage and engine. In his report, the inspector said that the aircraft appeared to have contacted the ground in an inverted attitude with little or no forward velocity. The inspector noted that no airworthiness discrepancies were noted with either the engine or airframe during the examination.

The pilot's medical certificate had expired almost 2 years prior to the date of the accident. The pilot's logbook was not located to ascertain his total flight hours and time in the aircraft, or to determine if he had any prior instruction in spin recovery techniques.

The forensic toxicology report from the FAA Civil Aeronautical Medical Institute stated that no controlled substances or other debilitating drugs were found. It was not possible to test for carbon monoxide or cyanide due to lack of suitable specimens.

Aircraft

Registration
N28BD
Reported as
Devendorf Glassair GL25 (GLASSAIR G)
Category
Airplane, amateur-built
Serial number
3065
Engine
Lycoming IO-540-K1G5, 300 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Bryan K. Devendorf
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · February 17, 1997 · 3 hours before
Departed
7E0 · Aguilla, AZ

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
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Expired
Seat
Left
Toxicology
Performed
Flight hours
1,600 total

Weather

Conditions
Visual (VMC) · Day
Wind
30° at 10 knots
Visibility
65 statute miles
Lowest ceiling
None
Temperature
86 °F, dew point 37 °F
Altimeter
30.00 inHg
Observed at
PHX, 66 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.