- Date
- May 11, 2018, 08:00 local (15:00 UTC)
- Place
- Chandler, AZ
- Injuries
- 2 uninjured
- Phase of flight
- Taxi
- Defining events
- Taxi: Ground collisionTaxi: Ground collision
- Weather
- Visual (VMC) · Day
- Status
- Completed · report March 18, 2019
- Report
- Approved by Office Director
- NTSB office
- General Aviation Accidents
- Parties
- FAA
- Case key
- 97238
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 pilot’s failure to stop and yield to the airplane taxiing on the taxiway, which resulted in a ground collision.
The other pilot’s failure to stop and yield to the airplane taxiing on the taxiway, which resulted in a ground collision.
Findings · 4
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
N481B · Aeropro CZ S R O A240
N4121T · Piper PA 28
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
N481B · Aeropro CZ S R O A240
N4121T · Piper PA 28
Analysis
According to the pilot in the low-wing airplane, he was cleared by ground control to taxi to runway 22R via "Alpha and November." Taxiway Alpha runs parallel to runway 22R. The pilot approached taxiway Alpha via taxiway Mike, and before entering the intersection of taxiways Alpha and Mike, he "looked in all directions for aircraft" and then proceeded to turn left onto taxiway Alpha without stopping. His airplane's right wing collided with the left side of another airplane already taxiing via Alpha to 22R. He asserted that the other airplane was moving very fast when the collision occurred. His airplane sustained substantial damage to the right aileron. According to the student pilot in the high-wing airplane, he received clearance from ground control to taxi to runway 22R via "Alpha and November." He recalled that he was established on Alpha and heading toward 22R with his landing lights on. He saw the low-wing airplane approaching the intersection of taxiway Alpha and Mike from the nonmovement area. He reported that the low-wing airplane turned left onto taxiway Alpha without stopping. The low-wing airplane's right wing collided with the left side of his airplane. His airplane sustained damage to the left-wing lift strut, the left-wing support struts, and the windscreen. Both pilots reported that there were no preaccident mechanical malfunctions or failures with their airplanes that would have precluded normal operation.
According to the pilot in the low-wing airplane, he was cleared by ground control to taxi to runway 22R via "Alpha and November." Taxiway Alpha runs parallel to runway 22R. The pilot approached taxiway Alpha via taxiway Mike, and before entering the intersection of taxiways Alpha and Mike, he "looked in all directions for aircraft" and then proceeded to turn left onto taxiway Alpha without stopping. His airplane's right wing collided with the left side of another airplane already taxiing via Alpha to 22R. He asserted that the other airplane was moving very fast when the collision occurred. His airplane sustained substantial damage to the right aileron. According to the student pilot in the high-wing airplane, he received clearance from ground control to taxi to runway 22R via "Alpha and November." He recalled that he was established on Alpha and heading toward 22R with his landing lights on. He saw the low-wing airplane approaching the intersection of taxiway Alpha and Mike from the nonmovement area. He reported that the low-wing airplane turned left onto taxiway Alpha without stopping. The low-wing airplane's right wing collided with the left side of his airplane. His airplane sustained damage to the left-wing lift strut, the left-wing support struts, and the windscreen. Both pilots reported that there were no preaccident mechanical malfunctions or failures with their airplanes that would have precluded normal operation.
Factual narrative
According to the pilot in the low-wing airplane, he was cleared by ground control to taxi to runway 22R via "Alpha and November." Taxiway Alpha runs parallel to runway 22R. The pilot approached taxiway Alpha via taxiway Mike, and before entering the intersection of taxiways Alpha and Mike, he "looked in all directions for aircraft" and then proceeded to make a left turn onto taxiway Alpha without stopping. His airplane's right wing collided with the left side of another airplane already taxing via Alpha to 22R. He asserted that the other airplane was moving very fast when the collision occurred. His airplane sustained substantial damage to the right aileron. According to the student pilot in the high wing airplane, he received clearance from ground control to taxi to runway 22R via "Alpha and November." He recalled that he was established on Alpha and heading toward 22R with his landing lights on. He saw the low wing airplane approaching the intersection of taxiway Alpha and Mike from the non-movement area. He reported that the low-wing airplane made a left turn onto taxiway Alpha without stopping. The low-wing airplane's right wing collided with the left side of his airplane. His airplane sustained damage to the left-wing lift strut, the left wing support struts, and the windscreen. Both pilots reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.
According to the pilot in the low-wing airplane, he was cleared by ground control to taxi to runway 22R via "Alpha and November." Taxiway Alpha runs parallel to runway 22R. The pilot approached taxiway Alpha via taxiway Mike, and before entering the intersection of taxiways Alpha and Mike, he "looked in all directions for aircraft" and then proceeded to make a left turn onto taxiway Alpha without stopping. His airplane's right wing collided with the left side of another airplane already taxing via Alpha to 22R. He asserted that the other airplane was moving very fast when the collision occurred. His airplane sustained substantial damage to the right aileron. According to the student pilot in the high wing airplane, he received clearance from ground control to taxi to runway 22R via "Alpha and November." He recalled that he was established on Alpha and heading toward 22R with his landing lights on. He saw the low wing airplane approaching the intersection of taxiway Alpha and Mike from the non-movement area. He reported that the low-wing airplane made a left turn onto taxiway Alpha without stopping. The low-wing airplane's right wing collided with the left side of his airplane. His airplane sustained damage to the left-wing lift strut, the left wing support struts, and the windscreen. Both pilots reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Aircraft · 2
- Registration
- N481B
- Reported as
- Aeropro CZ S R O A240
- Category
- Airplane
- Serial number
- 47816
- Built
- 2016
- Airframe hours
- 232
- Engine
- Rotax 912ULS, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Airworthiness certificate
- Special, Special light-sport (Special)
- Last inspection
- Annual · June 15, 2015
- Departed
- CHD · Chandler, AZ
- Destination
- CHD · Chandler, AZ
- Airport
- CHD · Chandler Muni
- Equipment
- Electronic multifunction display
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
- N4121T
- Reported as
- Piper PA 28 (161)
- Category
- Airplane
- Serial number
- 2842017
- Built
- 1996
- Airframe hours
- 14,672
- Engine
- Lycoming O-320-D3G, 160 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Chandler Air Service Inc.
- Registered owner
- Chandler Air Service Inc.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · March 14, 2018
- Departed
- CHD · Chandler, AZ
- Destination
- E60 · Eloy, AZ
- Airport
- CHD · Chandler Muni
- Equipment
- Stall warning system
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 N481B
- Age
- 62
- Injuries
- None
- Certificate
- Student
- Medical
- Sport pilot, With waivers/limitations
- Seat
- Left
- Restraint
- 4-point
- Flight hours
- 45 total · 45 in this make and model · 24 as pilot in command · 26 in the last 90 days
- Role
- Pilot, aircraft N4121T
- Age
- 46
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Without waivers/limitations
- Last flight review
- April 13, 2017
- Seat
- Left
- Restraint
- 3-point
- Flight hours
- 68 total · 14 in this make and model · 27 as pilot in command · 14 in the last 90 days · 14 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 160° at 6 knots
- Visibility
- 10 statute miles
- Temperature
- 82 °F, dew point 32 °F
- Altimeter
- 29.76 inHg
- Observed at
- KCHD
Docket · 8
The files NTSB released with the investigation on November 21, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 11.0 MB in all.