WPR23LA041

NTSB accident investigation · Cessna 172M · Las Vegas, NV · November 18, 2022

Accident · No injuriesClass 3 · LimitedFinal report
Date
November 18, 2022, 10:27 local (18:27 UTC)
Place
Las Vegas, NV · Approach end RWY 30R
Injuries
3 uninjured
Phase of flight
Landing
Aircraft
N88ECessna 172MN4050PRobinson Helicopter R44
Defining events
Landing-flare/touchdown: Midair collisionManeuvering-hover: Midair collision
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Western Pacific Region
Parties
FAA
FAA report
20221118021912A
Case key
106336

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 student helicopter pilot’s failure to follow the tower controller’s landing instructions, which resulted in a midair collision.

Findings · 3

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.

N88E · Cessna 172M

Action: incorrect action performancePersonnel issues › Action/decision · Pilot of other aircraftCessna 172M: 19 casesAll aircraft: 1,386 casesProbable cause
Action: lack of actionPersonnel issues › Action/decision · ATC personnelCessna 172M: 15 casesAll aircraft: 792 casesProbable cause

N4050P · Robinson Helicopter R44

Action: incorrect action performancePersonnel issues › Action/decision · Student/instructed pilotRobinson Helicopter R44: 8 casesAll aircraft: 1,386 cases

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.

N88E · Cessna 172M

Analysis

The student pilot in the helicopter was conducting his first solo flight in the airport traffic pattern at a towered airport. The student pilot was cleared by the local LC2 controller (controller) to depart from taxiway Papa, which parallels the north side of runway 30R, and to fly the taxiway Papa option, which was a closed traffic pattern to the taxiway. After several successful full-stop landings to taxiway Papa, the controller instructed the accident helicopter to, when able, make a right turn on taxiway Kilo, and that landing on the east ramp was at the pilot’s own risk. However, the helicopter pilot reported that he mistakenly flew an approach to runway 30R, rather than taxiway Papa; he then terminated the approach in a hover over the runway. Video surveillance footage shows that the nose of the helicopter was oriented in the landing direction; the student pilot reported being unaware that an airplane was on approach to land on the runway. The airplane then collided with the aft section of the skids and the helicopter pitched up, rotated left about 90° and landed upright on the runway. The accident airplane was on a right downwind to land on runway 30R when the controller advised the pilot of the helicopter traffic operating on taxiway Papa. The airplane pilot stated that she made visual contact with the helicopter and that it appeared to be operating on taxiway Papa. During the turn onto the base leg for runway 30R, the right wing blocked the instructor’s view of the runway and she lost sight of the helicopter. The instructor stated that as they turned onto final approach, she was assisting the student in maintaining airspeed and the glide slope while managing the flap setting. She stated that a moment later, while approaching the runway threshold, she saw the helicopter and it appeared to be hovering over runway 30R, about 100-300 ft past the runway numbers, and not on taxiway Papa. The instructor recalled that it was too late to abort the landing by the time she realized the helicopter’s position, and elected to touch down underneath the helicopter. The airplane’s left wing collided with the skids of the helicopter, the fuselage rotated left, and the wing struck the ground, sustaining substantial damage to the spar. After hearing the helicopter’s call sign to acknowledge the instruction, the controller repeated the instruction and “observed [the] helicopter hovering over Taxiway Papa very slowly drifting towards a right turn on Kilo.” After walking across the tower to view an aircraft entering the pattern, she returned to observe that the Cessna had, “cranked the wheels all the way to the left to avoid the helicopter.” At that time, the helicopter landed on the runway, right in front of the Cessna, and the airplane “tipped on the wing, and for a minute, it looked like it would go upside-down” before turning upright again. The student pilot’s mistaken approach to runway 30R, rather than the taxiway where he was cleared to land (and wherehe had conducted previous full-stop landings), put him directly in the path of, and facing away from, the approaching airplane.

Factual narrative

On November 18, 2022, about 1027 Pacific standard time, a Cessna 172M, N88E, and a Robinson R44, N4050P, collided over runway 30R at North Las Vegas Airport (VGT), Las Vegas, Nevada. The flight instructor and student pilot on board the Cessna and the student pilot on board the Robinson were not injured. Both aircraft were operated under the provisions of Title 14 Code of Federal Regulations Part 91 as instructional flights. There were two helicopters, a Cessna airplane, and a Diamond airplane operating in the airport’s right-hand traffic pattern at the time of the accident. One helicopter, which was alternating turns in the taxiway pattern with the accident helicopter, was waiting on the east ramp for their turn in the pattern. The two airplanes were using right traffic for runway 30R. Taxiway Papa parallels the north side of runway 30R; both runway 30R and taxiway Papa were under control of the LC2 controller at the time of the accident. The Cessna had completed 3 approaches to runway 30R, including one full-stop and two touch-and-go landings, and the accident helicopter had completed 4 full-stop landings to taxiway Papa before the accident. (See Figure 1.) [For Figure 1, I suggest using high-res version of Fig. 4 from ATC Factual Report] At 10:24, the tower controller cleared the Cessna for the option to land on runway 30R; the pilot read back the instructions. At 10:25, the controller cleared the accident helicopter for takeoff from taxiway Papa, and subsequently cleared the student pilot for the option back to taxiway Papa; the pilot acknowledged the instructions. At 10:26, the controller advised the Cessna that there was helicopter traffic in a close right base for taxiway Papa, and the pilot replied that they were looking for the helicopter. At 10:27, the controller instructed the accident helicopter to, when able, make a right turn on taxiway Kilo, and that landing on the east ramp was at the pilot’s own risk. (See Figure 2.) The pilot responded by stating “Las Vegas tower, five zero papa.” The controller again instructed the helicopter pilot to make a right turn onto taxiway Kilo. The pilot did not acknowledge the instruction. Figure 2. View of initial point of impact in relation to Taxiway Papa, Taxiway Kilo, the East Ramp, and ATC. The student pilot in the accident helicopter, who was conducting a solo instructional flight, reported that he had departed from taxiway Papa, flew the right-hand traffic pattern, and was instructed by the controller to fly his approach to taxiway Papa. However, he reported that he mistakenly flew his approach to runway 30R and terminated the approach in a hover over the runway. Video surveillance footage shows that the nose of the helicopter was oriented in the landing direction; the student pilot reported being unaware that an airplane was on approach to land on the runway. The airplane collided with the aft section of the skids and the helicopter pitched up, rotated left about 90° and landed upright onthe runway. The instructor in the Cessna stated that, when they were on the downwind leg of the traffic pattern, she had brief visual contact with the helicopter, which appeared to be operating on taxiway Papa. During the turn onto the base leg, the right wing blocked the instructor’s view of the runway. The instructor stated that as they turned onto the final approach she was assisting the student in maintaining airspeed and the glideslope while managing the flap setting. She stated that a moment later she saw the helicopter and it appeared to be hovering over runway 30R, about 100-300 ft past the runway numbers, and not on taxiway Papa. The instructor in the Cessna recalled that it was too late to abort the landing and elected to touch down underneath the helicopter. The airplane’s left wing collided with the skids of the helicopter, the fuselage rotated left, and the wing struck the ground, causing substantial damage to the spar. Subsequently the right wing struck the runway surface before the airplane came to an abrupt stop. The controller stated that, after instructing the helicopter to turn right onto taxiway Kilo, “I didn’t hear a readback at the time,” but that she “thought that perhaps it was a critical stage of flight for him.” After hearing the helicopter’s call sign to acknowledge the instruction, she repeated the instruction and “observed [the] helicopter hovering over Taxiway Papa very slowly drifting towards a right turn on Kilo.” She continued, At the time, I had to walk across the tower to find my remaining aircraft in the pattern to make sure that the pattern entry was complete, and I observed the aircraft, the Diamond Star, entering the pattern. And I turned around to walk across the tower to observe my helicopter, and at that time, I saw a helicopter. It appeared that he made, instead of a right turn into the ramp, he made a left turn and was entering the runway. She then watched as the Cessna “cranked the wheels all the way to the left to avoid the helicopter.” At that time, the helicopter landed on the runway, right in front of the Cessna, and the airplane “tipped on the wing, and for a minute, it looked like it would go upside-down” before turning upright again.

Aircraft · 2

Registration
N88E
Reported as
Cessna 172M
Category
Airplane
Serial number
17261476
Built
1973
Airframe hours
7,098.8
Engine
Lycoming O-320-E2D, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
702 Helicopter Inc
Registered owner
702 Helicopter Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · October 25, 2022 · 73.1 hours before
Destination
Same as departure
Airport
VGT · North Las Vegas, runway 30R, 4,199 × 75 ft, asphalt
Equipment
ADS-B, Electronic flight bag or handheld device, Electronic multifunction display, 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.

Registration
N4050P
Reported as
Robinson Helicopter R44
Category
Helicopter
Serial number
30061
Built
2020
Airframe hours
2,562.6
Engine
Lycoming O-540-F1B5, 260 horsepower, reciprocating
Damage
Minor damage
Flight
Instructional · Part 91
Operator
Southern Utah University
Registered owner
Southern Utah University
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 4, 2022
Destination
Same as departure
Equipment
ADS-B

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 · 3

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor, aircraft N88E
Age
27
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1
Last flight review
November 17, 2022
Seat
Right
Restraint
3-point
Flight hours
340.9 total · 36.9 in this make and model · 245.9 as pilot in command · 86.6 in the last 90 days · 33.7 in the last 30 days · 2.1 in the last 24 hours
Role
Student pilot, aircraft N88E
Age
38
Injuries
None
Certificate
Student
Seat
Left
Restraint
3-point
Flight hours
22 total · 22 in this make and model · 1 in the last 24 hours
Role
Student pilot, aircraft N4050P
Age
33
Injuries
None
Certificate
Student
Medical
Class 2, Without waivers/limitations
Seat
Right
Restraint
3-point
Flight hours
60 total · 28 in this make and model · 7 as pilot in command · 23 in the last 90 days · 17 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
50 °F, dew point 18 °F
Altimeter
30.10 inHg
Observed at
KVGT
METAR
METAR KVGT 181753Z 00000KT 10SM CLR 10/M08 A3010 RMK AO2 SLP213 T01001078 10106 20050 51012=

Docket · 16

The files NTSB released with the investigation on December 5, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 445 MB in all.

FAA reports on this event · 1

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