GAA17CA301

NTSB accident investigation · Zwicker Murray R Glastar · Napa, CA · April 30, 2017

Accident · No injuriesData collectionFinal report
Date
April 30, 2017, 15:10 local (22:10 UTC)
Place
Napa, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N89SRZwicker Murray R Glastar
Defining event
Landing-landing roll: Landing gear collapse
Weather
Visual (VMC) · Day
Status
Completed · report August 3, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA/ FSDO
FAA report
20170430004519A
Case key
95227

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 amphibious float-equipped airplane's encounter with a submerged object during a water landing, which resulted in a nose-over.

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.

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.

Analysis

The pilot of the amphibious float-equipped airplane reported that, after the owner had completed multiple touch-and-go water landings, he chose to take the flight controls and perform a few water landings himself. He added that his first touch-and-go water landing "went very well." However, during the second touch-and-go water landing, the touchdown was smooth, but as he added power to "begin the climb away," the airplane veered right and nosed over into the water. He added that the right float may have struck a submerged object during the landing. The right wing lift strut sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. According to a Federal Aviation Administration (FAA) Aviation Safety Inspector who inspected the accident airplane postaccident, the forward first third section of the right float was bent upward and had "scratching and scoring" marks on the bottom side of the float. He added that he did not observe any rust or corrosion on either float. A review of the FAA airman certification database revealed that neither pilot held an airplane single-engine sea rating.

Factual narrative

The pilot of the amphibious float-equipped airplane reported that, after the owner had completed multiple touch-and-go water landings, he elected to take the flight controls and perform a few water landings himself. He added that his first touch-and-go water landing "went very well." However, during the second touch-and-go water landing, the touchdown was smooth, but as he added power to "begin the climb away", the airplane veered right and nosed over into the water. He added that, the right float may have struck a submerged object during the landing. The right wing lift strut sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. According to a Federal Aviation Administration (FAA) Aviation Safety Inspector who inspected the accident airplane postaccident, the forward first third section of the right float was bent upward and had "scratching and scoring" marks on the bottom side of the float. He added that he did not observe any rust or corrosion on either float. A review of the FAA airman certification database revealed that neither pilot held an airplane single engine sea rating.

Aircraft

Registration
N89SR
Reported as
Zwicker Murray R Glastar (NO SERIES)
Category
Airplane, amateur-built
Serial number
5492
Built
1997
Engine
Lycoming O-360 SERIES, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
CCR · Concord, CA
Destination
CCR · Concord, CA
Equipment
None

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
Age
67
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
March 1, 2017
Seat
Right
Restraint
4-point
Flight hours
4,500 total
Role
Other flight crew
Age
75
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Restraint
4-point

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 46 °F
Altimeter
30.04 inHg
Observed at
KSMF, 30 nm away

Docket · 4

The files NTSB released with the investigation on July 19, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.0 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.