ANC03LA054

NTSB accident investigation · deHAVILLAND DHC-2 · Sitka, AK · May 30, 2003

Accident · No injuriesLimited investigationFinal report
Date
May 30, 2003, 14:30 local (22:30 UTC)
Place
Sitka, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N60TFdeHAVILLAND DHC-2
Weather
Visual (VMC) · Day
Status
Completed · report November 25, 2003
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-JNU FSDO 05
FAA report
20030530037259A
Case key
57097

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's failure to retract the landing gear wheels of an amphibious float equipped airplane after departure from a paved runway, which resulted in a nose over when the airplane was landed on a nearby lake with the wheels extended. A contributing factor in the accident was the pilot's diverted attention during the short flight from the airport to the lake.

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.

Wheels down landing in waterLanding - flare/touchdown
Gear retraction - not performedPilot in commandCause
Diverted attentionPilot in commandFactor
Nose overLanding - flare/touchdown

Analysis

The airline transport certificated pilot departed from a paved runway for a short flight to a remote lake in an amphibious float-equipped airplane to deliver supplies to a client. The pilot reported that he was transporting several loads of equipment to the lake, and failed to visually check the gear position while looking for a new unloading area. He also indicated that he was distracted when he had to reset the flaps, and by a minor malfunction with the airplane's GPS receiver. He said he forgot to raise the landing gear wheels, and landed on the lake with the wheels extended. During the landing touchdown on the lake, the airplane nosed over and received damage to the left wing and fuselage. The airplane is equipped with floats that have landing gear position lights installed on the instrument panel. The airplane also has a mirror enabling the pilot to visually observe the landing gear position.

Factual narrative

On May 30, 2003, about 1430 Alaska daylight time, an amphibious float-equipped deHavilland DHC-2 airplane, N60TF, sustained substantial damage when it overturned during a wheels down landing on Salmon Lake, about 9 miles east-southeast of Sitka, Alaska. The airplane was being operated as a visual flight rules (VFR) local area nonscheduled cargo flight under Title 14, CFR Part 135, when the accident occurred. The airplane was operated by Harris Aircraft Services Inc., Sitka. The airline transport certificated pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight originated at the Sitka Rocky Gutierrez Airport, about 1419.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on May 30, the director of operations for the operator reported the pilot was landing on Salmon Lake to deliver supplies to a client at the lake. The airplane departed from a paved runway at Stika. The landing gear wheels were not retracted, and upon landing on the lake, the airplane nosed over and received damage to the left wing and fuselage. The airplane remained floating inverted. The director of operations said that the airplane is equipped with Wipline floats that have landing gear position lights installed on the instrument panel. The airplane also has a mirror enabling the pilot to visually observe the landing gear position.

During a telephone conversation with the NTSB IIC, on June 2, the pilot reported that he was transporting several loads of equipment to the lake. He said he was distracted during the short flight when he had to reset the flaps, and by a minor malfunction with the airplane's GPS receiver. The pilot said he forgot to raise the landing gear after departing the Sitka Airport, and landed on the lake with the gear extended.

In the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1) submitted by the pilot, the pilot indicated that during the approach to the lake, he performed a "GUMP" (gas, undercarriage, mixture, prop) check while looking for a new unloading area. He said he failed to visually check the gear position.

Aircraft

Registration
N60TF
Reported as
deHAVILLAND DHC-2
Category
Airplane
Serial number
57-2563
Airframe hours
6,060
Engine
Pratt & Whitney R-985, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Harris Aircraft Services Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · April 18, 2003 · 50 hours before
Departed
PASI · Sitka, AK
Destination
Sitka, AK
Flight plan
VFR

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
54
Injuries
None
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,720 total · 500 in this make and model · 3,750 as pilot in command · 185 in the last 90 days · 76 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 13 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
6,000 ft overcast
Temperature
54 °F, dew point 46 °F
Altimeter
29.80 inHg
Observed at
PASI, 9 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.