CHI01LA326

NTSB accident investigation · Cessna 208 · Aurora, MN · September 27, 2001

Accident · No injuriesLimited investigationFinal report
Date
September 27, 2001, 09:46 local (14:46 UTC)
Place
Aurora, MN
Injuries
7 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N12712Cessna 208
Weather
Visual (VMC) · Day
Status
Completed · report December 6, 2002
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20010927025809A
Case key
53521

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 pilot not maintaining the proper descent rate during the landing. Factors were the flap's popped circuit breaker, the pilot not verifying the flap's position, the glassy water, and the dock.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Hard landingLanding
Lowering of flaps - not verifiedPilot in commandFactor
Flt control syst,wing flap control - popped/trippedFactor
Proper descent rate - not maintainedPilot in commandCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - water,glassyFactor
On ground/water collision with objectLanding - roll
Object - otherFactor

Analysis

The floatplane sustained substantial damage on impact with water and a dock. The pilot and six passengers were uninjured. The pilot stated, "Once I cleared the [obstacles] I put the ignition on, prop full, fuel on both, flaps 20 [degrees] and checked gear up, powered back to get a good rate of descent over [obstacles] so I would not eat up the length of the lake positioning to land. (smooth surface) I came off the prop (as a brake) and began my round out higher than normal as I could feel an unusually high descent rate. In a matter seconds I could tell something was wrong as I rounded out and needed more bank angle to increase my turn rate. As I flared the plane continued to descend and the left float hit the water before I was ready and it hooked the plane immediately left about 45 [degrees] and then the rt float caught and began to slide sideways until we came to rest with the plane's tail up on the shore 90 [degrees] to the lake. ... After a while of sitting there I realized the flaps never came down when I put the handle down. The c/b [circuit breaker] was popped out." A witness stated, "Just as here cleared the shoreline, the plane started to drop and bank hard to the left (or south). For a short time I could not see the plane as it was blocked by the trees on the west bank. When it came back into view it was heading south and practically on the water. It seemed to come up short on the turn, kind of bounced a pontoon off the water or a dock causing the plane to rock. When it rocked back to the left it appeared to hook or dip the left wing into the water or maybe a rock point causing the plane to spin to the left and sideways. It hit the middle dock, which probably slowed it down and came to rest facing back to the east, resting in shallow water leaning to the right, propped up by the right wing." The airplane manual stated, "A standby system can be used to operate the flaps in the event the primary system should malfunction."

Factual narrative

On September 27, 2001, about 0946 central daylight time, a Cessna 208, N12712, piloted by an airline transport pilot, sustained substantial damage on impact with water and a dock during a hard landing on Wynne Lake, near Aurora, Minnesota. The corporate flight was operating under 14 CFR Part 91 on an IFR flight plan. Visual meteorological conditions prevailed at the time of the accident. The pilot and six passengers were uninjured. The floatplane originated its flight from Lake Minnetonka, Minnesota at 0830, and was landing on Wynne Lake at the time of the accident.

The pilot stated:

I lined up dogleg with the ESE Edge of the lake in order to fly close to the north shore as I

touched down. Once I cleared the [obstacles] I put the ignition on, prop full, fuel on both,

flaps 20 [degrees] and checked gear up, powered back to get a good rate of descent

over [obstacles] so I would not eat up the length of the lake positioning to land. (smooth

surface) I came off the prop (as a brake) and began my round out higher than normal as I

could feel an unusually high descent rate. In a matter seconds I could tell something was

wrong as I rounded out and needed more bank angle to increase my turn rate. As I flared

the plane continued to descend and the left float hit the water before I was ready and it

hooked the plane immediately left about 45 [degrees] and then the rt float caught and

began to slide sideways until we came to rest with the plane's tail up on the shore 90

[degrees] to the lake. I shut everything off, fuel, master, etc and exited my door[.] I

opened the pass cabin door and everyone jumped onto the beach, I got their golf clubs

out and they went golfing[.] ... After a while of sitting there I realized the flaps never came

down when I put the handle down. The c/b [circuit breaker] was popped out.

A witness stated:

I first saw the plane as it came in just over the trees on the eastern shore. Just as here

cleared the shoreline, the plane started to drop and bank hard to the left (or south). For a

short time I could not see the plane as it was blocked by the trees on the west bank. When

it came back into view it was heading south and practically on the water. It seemed to

come up short on the turn, kind of bounced a pontoon off the water or a dock causing the

plane to rock. When it rocked back to the left it appeared to hook or dip the left wing into

the water or maybe a rock point causing the plane to spin to the left and sideways. It hit the

middle dock, which probably slowed it down and came to rest facing back to the east,

resting in shallow water leaning to the right, propped up by the right wing. It all happened

very fast and I can't be positive of what hit what causing what.

A Cessna 208 information manual was reviewed. The manual stated, "A standby system can be used to operate the flaps in the event the primary system should malfunction."

The pilots safety recommendation stated, "Possible aural or light indication that a breaker has opened the circuit."

Aircraft

Registration
N12712
Reported as
Cessna 208
Category
Airplane
Serial number
20800308
Airframe hours
429
Engine
Pratt & Whitney PT6-114A, 675 horsepower, turbo prop
Damage
Substantial damage
Flight
Executive/Corporate · Part 91
Registered owner
Aquanaut LLC
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 1, 2001 · 60 hours before
Departed
Lake Minnetonka, MN
Destination
Aurora, MN
Flight plan
IFR

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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
40
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Last flight review
September 6, 2000
Seat
Left
Flight hours
5,535 total · 400 in this make and model · 4,845 as pilot in command · 75 in the last 90 days · 45 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
50° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
46 °F, dew point 43 °F
Altimeter
30.21 inHg
Observed at
EVM, 14 nm away

FAA reports on this event · 1

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