LAX95LA276

NTSB accident investigation · North American AT-6B · Glendale, AZ · August 1, 1995

Accident · No injuriesLimited investigationFinal report
Date
August 1, 1995, 09:00 local (16:00 UTC)
Place
Glendale, AZ
Injuries
3 uninjured
Phase of flight
Takeoff
Aircraft
N105DGNorth American AT-6BN90629North American AT-6A
Weather
Visual (VMC) · Day
Status
Completed · report November 30, 1995
Report
Approved by Office Director
Case key
29169

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

On this page

Probable cause

The failure of the pilot of the other aircraft to follow pre-briefed instructions and failure to see and avoid the preceding aircraft awaiting takeoff.

the failure of the pilot to follow pre-briefed instructions, and failure to see and avoid the preceding aircraft awaiting takeoff.

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.

On ground/water collision with objectTakeoff - roll/run
Crew/group briefing - not followedPilot in commandCause
Visual lookout - inadequatePilot in commandCause
On ground/water collision with objectTakeoff - roll/run
Crew/group briefing - not followedPilot of other aircraftCause
Visual lookout - inadequatePilot of other aircraftCause

Analysis

The pilot in the number 3 aircraft, in position on the right side of the runway, collided with the number 2 aircraft, positioned for takeoff on the left side, about 5 to 6 seconds after the lead aircraft began its takeoff roll. The number 3 pilot thought that the number 2 pilot was taking off with the lead aircraft and initiated his takeoff roll after counting to 5 seconds. The number 2 pilot stated that the group of pilots decided earlier on interval takeoffs due to the narrow runway.

The pilot in the number 3 aircraft, in position on the right side of the runway, collided with the number 2 aircraft, positioned for takeoff on the left side, about 5 to 6 seconds after the lead aircraft began its takeoff roll. The number 3 pilot thought that the number 2 pilot was taking off with the lead aircraft and initiated his takeoff roll after counting to 5 seconds. The number 2 pilot stated that the group of pilots decided earlier on interval takeoffs due to the narrow runway.

Factual narrative

On August 1, 1995, at 0900 hours mountain standard time, a North American AT-6B, N105DG, collided with another AT-6, N90629, on the runway at the beginning of a takeoff roll at the airport in Glendale, Arizona. Visual meteorological conditions existed at the time for the pleasure flight to El Paso, Texas. The AT-6 (N90629) awaiting takeoff on the runway received substantial damage when the AT-6 (N105DG) behind it started its takeoff roll and collided with the wing of N90629. The two pilots and one passenger were not injured.

The two aircraft were part of a group of five WW-II Warbirds departing single ship from runway 01 for an across-the-country tour of aircraft celebrating the end of the World War II.

The investigation revealed that N105DG was number 3 in the group of similar aircraft to takeoff. The number 1 aircraft began its take off with about 5 seconds separation for spacing. The number 2 aircraft (N90629) was waiting his turn, as briefed, for takeoff when the collision occurred. The pilot of the number 3 aircraft stated to an Federal Aviation Administration inspector that he didn't understand the pretakeoff pilot briefing regarding the takeoff procedures. He initiated his takeoff and his left wing collided with the right wing of the number 2 aircraft.

The pilot of N105DG stated in his report that he understood that the number 2 aircraft would be making a formation takeoff with the lead aircraft. All aircraft taxied onto the runway and he then lined up on the right side of the runway with the number 1 aircraft in view. He observed the lead aircraft begin its takeoff roll and assumed that the number 2 aircraft was rolling within formation with him. The pilot counted 5 to 6 seconds for spacing and started his takeoff roll. He angled to the left to align the aircraft with the runway centerline and then straightened out on the runway centerline. At this time, the pilot observed the number 2 aircraft still stationary in front and to the left. He attempted to avoid a collision by going to the right but was unsuccessful. The left wing of N105DG collided with the right wing of N90629.

The pilot of N90629 stated in his report that he pulled nearly abeam of the lead aircraft and stopped. After lead began his takeoff roll, he began to count before he released his brakes. As he reached the count of 4 seconds, N105DG went by on the right and collided with his right wing. He further stated that the group had briefed at 0800 that morning and it was decided that an interval takeoff would be made because the runway was too narrow.

Runway 01 at the Glendale airport is 5,350 feet in length and 75 feet wide.

The pilot in N105DG stated he was seated in the rear seat. The front seat was occupied by a pilot rated passenger.

On August 1, 1995, at 0900 hours mountain standard time, a North American AT-6B, N105DG, collided with another AT-6, N90629, on the runway at the beginning of a takeoff roll at the airport in Glendale, Arizona. Visual meteorological conditions existed at the time for the pleasure flight to El Paso, Texas. The AT-6 (N90629) awaiting takeoff on the runway received substantial damage when the AT-6 (N105DG) behind it started its takeoff roll and collided with the wing of N90629. The two pilots and one passenger were not injured.

The two aircraft were part of a group of five WW-II Warbirds departing single ship from runway 01 for an across-the-country tour of aircraft celebrating the end of the World War II.

The investigation revealed that N105DG was number 3 in the group of similar aircraft to takeoff. The number 1 aircraft began its take off with about 5 seconds separation for spacing. The number 2 aircraft (N90629) was waiting his turn, as briefed, for takeoff when the collision occurred. The pilot of the number 3 aircraft stated to an Federal Aviation Administration inspector that he didn't understand the pretakeoff pilot briefing regarding the takeoff procedures. He initiated his takeoff and his left wing collided with the right wing of the number 2 aircraft.

The pilot of N105DG stated in his report that he understood that the number 2 aircraft would be making a formation takeoff with the lead aircraft. All aircraft taxied onto the runway and he then lined up on the right side of the runway with the number 1 aircraft in view. He observed the lead aircraft begin its takeoff roll and assumed that the number 2 aircraft was rolling within formation with him. The pilot counted 5 to 6 seconds for spacing and started his takeoff roll. He angled to the left to align the aircraft with the runway centerline and then straightened out on the runway centerline. At this time, the pilot observed the number 2 aircraft still stationary in front and to the left. He attempted to avoid a collision by going to the right but was unsuccessful. The left wing of N105DG collided with the right wing of N90629.

The pilot of N90629 stated in his report that he pulled nearly abeam of the lead aircraft and stopped. After lead began his takeoff roll, he began to count before he released his brakes. As he reached the count of 4 seconds, N105DG went by on the right and collided with his right wing. He further stated that the group had briefed at 0800 that morning and it was decided that an interval takeoff would be made because the runway was too narrow.

Runway 01 at the Glendale airport is 5,350 feet in length and 75 feet wide.

The pilot in N105DG stated he was seated in the rear seat. The front seat was occupied by a pilot rated passenger.

Aircraft · 2

Registration
N105DG
Reported as
North American AT-6B
Category
Airplane
Serial number
90955
Airframe hours
4,900
Engine
P&W R-1340AN-1, 600 horsepower, reciprocating
Damage
Minor damage
Flight
Personal · Part 91
Registered owner
David H. Groark
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 2, 1995 · 40 hours before
Departed
GEU
Destination
BIF · El Paso, TX
Airport
GEU · Glendale Municipal, runway 1, 5,350 × 75 ft, asphalt
Registration
N90629
Reported as
North American AT-6A
Category
Airplane
Serial number
78-7375
Airframe hours
6,500
Engine
P&W R-1340AN-1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert G. Ford
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 6, 1994 · 118 hours before
Departed
GEU
Destination
BIF · El Paso, TX
Airport
GEU · Glendale Municipal, runway 1, 5,350 × 75 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N105DG
Age
59
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
4,700 total · 425 in this make and model · 4,300 as pilot in command · 26 in the last 90 days · 12 in the last 30 days · 2 in the last 24 hours
Role
Pilot, aircraft N90629
Age
35
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
5,575 total · 313 in this make and model · 4,500 as pilot in command · 55 in the last 90 days · 20 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
95 °F

FAA reports on this event · 2

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