WPR24LA317

NTSB accident investigation · Yakovlev YAK-50 · Watsonville, CA · September 20, 2024

Accident · No injuriesClass 4 · LimitedFinal report
Date
September 20, 2024, 12:45 local (19:45 UTC)
Place
Watsonville, CA
Injuries
2 uninjured
Phase of flight
Taxi
Aircraft
N613BMYakovlev YAK-50N6027FBeech S35
Defining events
Taxi-to runway: Ground collisionTaxi-to runway: Ground collision
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
195228

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 Yak-50 pilot’s failure to maintain clearance from another airplane while taxiing and maneuvering. Contributing to the accident was the pilot’s inattention due to a distraction inside the cockpit.

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.

N613BM · Yakovlev YAK-50

Attention/monitoring: attentionPersonnel issues › Psychological · PilotYakovlev YAK-50: 1 caseAll aircraft: 226 casesProbable cause

N6027F · Beech S35

Object/animal/substance: aircraftEnvironmental issues › Physical environment · Ability to respond/compensateBeech S35: 1 caseAll aircraft: 116 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.

N613BM · Yakovlev YAK-50

N6027F · Beech S35

Analysis

The pilot of the Yak-50 reported that he started taxiing from the airport transient area towards the active runway as the lead airplane for a formation training flight with three airplanes following behind. He remarked that there is no forward visibility in his tailwheel equipped airplane and typically completes S turns to improve his visibility. However, the pilot assumed the approaching run-up area was clear and was concerned that the airplane’s pneumatic system was low, so he decided not to perform any additional turns to conserve air. He traversed the intersecting runway and still did not accomplish an S turn because he was now distracted by the radio and still trying to conserve air. As he approached the engine run-up area he looked to the left and then looked to the right at which time he observed his right wingtip contact the propeller of the Beechcraft S35, which resulted in substantial damage to the right wing. According to the pilot of the Beechcraft S35, he had finished his engine run-up at the active runway and was waiting for airplanes to pass and takeoff before he departed. While configuring his radio for the flight he noticed movement on his left and observed the Yak-50 moving quickly. The Yak-50 did not follow the curve of the taxiway and its right wing impacted his airplane. The pilots of both airplanes reported no preimpact mechanical anomalies or malfunctions that could have precluded normal operation.

Aircraft · 2

Registration
N613BM
Reported as
Yakovlev YAK-50
Category
Airplane
Serial number
842803
Built
1984
Engine
Vedeneyev M-14PF, 400 hp, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Aerobatic
Last inspection
Annual · May 31, 2024
Airport
WVI · Watsonville Muni, runway 20, 4,502 × 149 ft, asphalt
Equipment
Handheld GPS, Electronic multifunction display, Electronic flight bag or handheld device

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
N6027F
Reported as
Beech S35
Category
Airplane
Serial number
D-7895
Built
1965
Airframe hours
5,306
Engine
Cont Motor IO-520-BB, 285 horsepower, reciprocating
Damage
Minor damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · August 22, 2024
Destination
SNS · Salinas, CA
Flight plan
IFR
Equipment
Onboard weather, ADS-B, Auto-pilot, Electronic flight bag or handheld device, Electronic primary flight 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.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N613BM
Age
64
Injuries
None
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Seat
Front
Restraint
5-point
Flight hours
3,685 total · 1,600 in this make and model · 3,630 as pilot in command · 28.9 in the last 90 days · 11.3 in the last 30 days · 2.1 in the last 24 hours
Role
Pilot, aircraft N6027F
Age
58
Injuries
None
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
June 30, 2023
Seat
Left
Restraint
3-point
Flight hours
5,236 total · 27 in this make and model · 4,648 as pilot in command · 12 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 5 knots
Visibility
10 statute miles
Lowest ceiling
1,300 ft overcast
Temperature
64 °F, dew point 55 °F
Altimeter
29.94 inHg
Observed at
KWVI, 68 nm away
METAR
METAR KWVI 201953Z AUTO 16005KT 10SM OVC013 18/13 A2994 RMK AO2 SLP137 T01780128=

Docket · 3

The files NTSB released with the investigation on April 22, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 8.4 MB in all.