ERA10CA287

NTSB accident investigation · Lepow David A Prgsv Aerdyn SEA REY · Chester, PA · May 29, 2010

Accident · Minor injuriesData collectionFinal report
Date
May 29, 2010, 11:25 local (15:25 UTC)
Place
Chester, PA
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N713ACLepow David A Prgsv Aerdyn SEA REY
Defining event
Landing-flare/touchdown: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report April 12, 2011
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20100529005329A
Case key
76148

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The airplane’s collision with a submerged object during landing, which resulted in a nose-over.

Findings · 1

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.

Object/animal/substance: hidden/submerged objectEnvironmental issues › Physical environment · Effect on equipmentLepow David A PRGSV AERDYN SEA REY: 1 caseAll aircraft: 36 casesProbable cause

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 certified flight instructor (CFI) stated that the purpose of the flight was to practice glassy water landings in the float-equipped airplane. They overflew the practice area to check the condition of the river and the CFI stated that there were no obstacles or debris visible. Shortly after touchdown, both pilots reported hearing a loud bang and the airplane immediately nosed over. Both pilots exited the submerged airplane and sustained minor injuries. According to a Federal Aviation Administration inspector, the wreckage showed damage consistent with striking a submerged object. The airplane incurred substantial damage to its canopy, hull, and tail.

Factual narrative

The certified flight instructor (CFI) stated that the purpose of the flight was to practice glassy water landings. After taking off from Spitfire Aerodrome, 7N7, they flew to the Philadelphia Seaplane Base practice area and overflew the area to check the condition of the river. The CFI stated that there were “no obstacles or debris visible.” Shortly after touchdown, both pilots reported hearing a loud bang, and the airplane immediately nosed over. Both pilots exited the submerged airplane and sustained minor injuries. According to the Federal Aviation Administration inspector-in-charge, the wreckage showed damage consistent with striking a submerged object and the landing was performed in the correct configuration. The airplane incurred substantial damage to its canopy, hull, and tail.

Aircraft

Registration
N713AC
Reported as
Lepow David A Prgsv Aerdyn SEA REY
Category
Airplane, amateur-built
Serial number
1NK143
Airframe hours
260
Engine
Bombardier ROTAX 912, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Dell Aero Inc
Registered owner
Dell Aero Inc
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · June 6, 2009
Departed
Chester, PA
Destination
Chester, PA

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
Flight instructor
Age
65
Injuries
Minor
Certificates
Flight instructor, Airline transport
Airplane ratings
Multi-engine sea, Single-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
May 27, 2010
Seat
Right
Flight hours
24,000 total · 2 in this make and model · 18,900 as pilot in command · 50 in the last 90 days · 20 in the last 30 days · 1 in the last 24 hours
Role
Student pilot
Age
30
Injuries
Minor
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
May 10, 2010
Seat
Left
Flight hours
4,000 total · 10 in this make and model · 3,000 as pilot in command · 100 in the last 90 days · 40 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 5 knots
Visibility
10 statute miles
Temperature
72 °F, dew point 63 °F
Altimeter
29.96 inHg
Observed at
PHL, 5 nm away

Docket · 2

The files NTSB released with the investigation on November 17, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 869 KB 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.