LAX95LA194

NTSB accident investigation · Aero Commander 500S · Santa Barbara, CA · May 23, 1995

Accident · Serious injuriesLimited investigationFinal report
Date
May 23, 1995, 12:15 local (19:15 UTC)
Place
Santa Barbara, CA
Injuries
1 serious, 2 uninjured
Phase of flight
Taxi
Aircraft
N9076NAero Commander 500SN101WLShaffer WLAC-1
Weather
Visual (VMC) · Day
Status
Completed · report December 19, 1995
Report
Approved by Office Director
Case key
29101

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 inadequate visual lookout by both pilots and their failures to maintain adequate separation from each other while taxiing in a non-movement area.

the inadequate visual lookout by both pilots and their failures to maintain adequate separation from each other while taxiing in a non-movement area.

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.

Collision between aircraft (other than midair)Taxi
Visual lookout - inadequatePilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause
Collision between aircraft (other than midair)Taxi
Visual lookout - inadequatePilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause

Analysis

A review of air traffic control tower tape transcripts verified that both pilots had been given and acknowledged taxi clearances, but neither had received traffic advisories regarding each others taxi routes. The wlac-1 was cleared to taxi westbound on taxiway charlie. The aero commander had also been cleared to taxi on taxiway charlie and was entering the taxiway from the ramp. As the aero commander moved onto the taxiway both aircraft converged and collided. Neither pilot reported seeing the other until just before the collision. The portion of taxiway charlie where the collision occurred was redesignated a ramp area in 1986. According to FAA air traffic control handbook 7110.65, non-movement areas including ramps are not under the control of the tower. The handbook further states that the responsibility for collision avoidance in non-movement areas is that of the pilot.

A review of air traffic control tower tape transcripts verified that both pilots had been given and acknowledged taxi clearances, but neither had received traffic advisories regarding each others taxi routes. The wlac-1 was cleared to taxi westbound on taxiway charlie. The aero commander had also been cleared to taxi on taxiway charlie and was entering the taxiway from the ramp. As the aero commander moved onto the taxiway both aircraft converged and collided. Neither pilot reported seeing the other until just before the collision. The portion of taxiway charlie where the collision occurred was redesignated a ramp area in 1986. According to FAA air traffic control handbook 7110.65, non-movement areas including ramps are not under the control of the tower. The handbook further states that the responsibility for collision avoidance in non-movement areas is that of the pilot.

Factual narrative

On May 23, 1995, at 1215 Pacific daylight time, an Aero Commander 500S, N9076N, collided with an experimental WLAC-1, N101WL, while both aircraft were taxiing at Santa Barbara, California, airport. The Aero Commander was owned and operated by Commandair and was departing on an aerial observation mission. The experimental WLAC-1 was owned and operated by the pilot and was preparing to depart on a personal flight. Visual meteorological conditions prevailed and neither aircraft had filed a flight plan for their respective operations. Neither the certificated airline transport pilot of the Aero Commander nor the certificated private pilot of the WLAC-1 was injured; however, the sole passenger onboard the Aero Commander sustained serious injuries.

According to statements made by air traffic controllers at the airport, both aircraft had received clearances to taxi, but neither had been given traffic advisories regarding each others taxi routes. The WLAC-1 was cleared to taxi westbound on taxiway Charlie en route to Pacific Aviation. The WLAC-1 had been instructed to hold short of runway 15L. The Aero Commander was cleared to taxi to runway 15L via taxiway Charlie. According to the pilot of the Aero Commancer he was in the process of turning right to reverse direction and entering taxiway Charlie southwest bound from the Santa Barbara Aviation ramp.

As the pilot of the Aero Commander began to merge onto taxiway Charlie, his path crossed in front of the oncoming WLAC-1. Both aircraft converged on approximately a 45-degree angle. As the aircraft made contact the left wing of the Aero Commander struck the right wing of the WLAC-1, spinning that aircraft nearly 180 degrees in a clockwise direction. During that process the WLAC-1's propeller struck the Aero Commander in the area of the left pilot's door.

The pilot of the Aero Commander was seated in the right seat. He stated that after receiving a taxi clearance, he approached taxiway Charlie, and looked both left and right for vehicles and aircraft. Not seeing any traffic, he started a turn to the right (west). As he entered taxiway Charlie, his aircraft was struck by another aircraft approaching from his left rear.

The pilot of the WLAC-1 reported that after receiving a taxi clearance, he was taxiing at the speed of a brisk walk when the Aero Commander appeared rapidly from his right rear blind spot. Upon seeing the aircraft approaching from his right, he attempted to swerve left but was unable to avoid a collision due to the proximity and closure rate of the other aircraft.

A review of air traffic control tower (ATCT) tape transcripts verified that both pilots had been given and acknowledged taxi clearances. However, the portion of taxiway Charlie (east of taxiway Juliet) where the collision occurred was redesignated a ramp area on August 11, 1986, by the Santa Barbara Airport Director. According to FAA Air Traffic Control specialists, non-movement areas are not under the control of the ATCT. The responsibility for collision avoidance in non-movement areas is that of the pilot.

On May 23, 1995, at 1215 Pacific daylight time, an Aero Commander 500S, N9076N, collided with an experimental WLAC-1, N101WL, while both aircraft were taxiing at Santa Barbara, California, airport. The Aero Commander was owned and operated by Commandair and was departing on an aerial observation mission. The experimental WLAC-1 was owned and operated by the pilot and was preparing to depart on a personal flight. Visual meteorological conditions prevailed and neither aircraft had filed a flight plan for their respective operations. Neither the certificated airline transport pilot of the Aero Commander nor the certificated private pilot of the WLAC-1 was injured; however, the sole passenger onboard the Aero Commander sustained serious injuries.

According to statements made by air traffic controllers at the airport, both aircraft had received clearances to taxi, but neither had been given traffic advisories regarding each others taxi routes. The WLAC-1 was cleared to taxi westbound on taxiway Charlie en route to Pacific Aviation. The WLAC-1 had been instructed to hold short of runway 15L. The Aero Commander was cleared to taxi to runway 15L via taxiway Charlie. According to the pilot of the Aero Commancer he was in the process of turning right to reverse direction and entering taxiway Charlie southwest bound from the Santa Barbara Aviation ramp.

As the pilot of the Aero Commander began to merge onto taxiway Charlie, his path crossed in front of the oncoming WLAC-1. Both aircraft converged on approximately a 45-degree angle. As the aircraft made contact the left wing of the Aero Commander struck the right wing of the WLAC-1, spinning that aircraft nearly 180 degrees in a clockwise direction. During that process the WLAC-1's propeller struck the Aero Commander in the area of the left pilot's door.

The pilot of the Aero Commander was seated in the right seat. He stated that after receiving a taxi clearance, he approached taxiway Charlie, and looked both left and right for vehicles and aircraft. Not seeing any traffic, he started a turn to the right (west). As he entered taxiway Charlie, his aircraft was struck by another aircraft approaching from his left rear.

The pilot of the WLAC-1 reported that after receiving a taxi clearance, he was taxiing at the speed of a brisk walk when the Aero Commander appeared rapidly from his right rear blind spot. Upon seeing the aircraft approaching from his right, he attempted to swerve left but was unable to avoid a collision due to the proximity and closure rate of the other aircraft.

A review of air traffic control tower (ATCT) tape transcripts verified that both pilots had been given and acknowledged taxi clearances. However, the portion of taxiway Charlie (east of taxiway Juliet) where the collision occurred was redesignated a ramp area on August 11, 1986, by the Santa Barbara Airport Director. According to FAA Air Traffic Control specialists, non-movement areas are not under the control of the ATCT. The responsibility for collision avoidance in non-movement areas is that of the pilot.

Aircraft · 2

Registration
N9076N
Reported as
Aero Commander 500S
Category
Airplane
Serial number
3063
Airframe hours
7,005
Engine
Lycoming IO-540-E1B5, 290 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial observation · Part 91
Registered owner
Commadair Inc.
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · April 1, 1995 · 15 hours before
Departed
SBA
Destination
CRQ · Palomar, CA
Airport
SBA · Santa Barbara

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.

Registration
N101WL
Reported as
Shaffer WLAC-1
Category
Airplane, amateur-built
Serial number
001
Airframe hours
248
Engine
Continental IO-360C, 210 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Dennis Bruce Dierenfield
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · October 21, 1994 · 118 hours before
Departed
SBA
Airport
SBA · Santa Barbara

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 N9076N
Age
49
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
15,146 total · 3,800 in this make and model · 8,177 as pilot in command · 208 in the last 90 days · 55 in the last 30 days · 3 in the last 24 hours
Role
Pilot, aircraft N101WL
Age
54
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
901 total · 220 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 8 knots
Visibility
15 statute miles
Lowest ceiling
12,000 ft broken
Temperature
63 °F, dew point 52 °F
Altimeter
30.00 inHg
Observed at
SBA

FAA reports on this event · 2

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