ANC03LA043

NTSB accident investigation · de Havilland DHC-6 · Anchorage, AK · April 10, 2003

Accident · No injuriesLimited investigationFinal report
Date
April 10, 2003, 09:35 local (17:35 UTC)
Place
Anchorage, AK
Injuries
19 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N886EAde Havilland DHC-6
Weather
Visual (VMC) · Day
Status
Completed · report November 25, 2003
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
FAA report
20030410007269A
Case key
56857

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 failure of the captain to maintain adequate clearance between the airplane's wingtip and a parked vehicle. A factor contributing to the accident was the failure of ground personnel to utilize a wing walker as prescribed in company policy when aircraft are operated near obstacles.

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.

On ground/water collision with objectTaxi - from landing
Clearance - not maintainedPilot in commandCause
Object - vehicle
Procedures/directives - not complied withGround personnelFactor

Analysis

The captain was taxiing the airplane to the gate area at the conclusion of a scheduled domestic passenger flight. The airplane was being marshaled into a parking spot by a single ground guide utilizing hand signals. No other airplanes were parked nearby, and wing-walkers were not utilized. As the airplane was being positioned by the ground guide, the underside of the left wing struck the top of a parked fleet service van. Inspection of the left wing revealed that the outboard flap hinge assembly was displaced upward requiring replacement of the outboard rib, the outboard flap hanger assembly, and wrinkled upper wing skin near the wingtip. The director of safety for the operator reported that a wing walker was not available or used as required by company policy when aircraft are operated near obstacles.

Factual narrative

On April 10, 2003, about 0935 Alaska daylight time, a de Havilland DHC-6 airplane, N886EA, sustained substantial damage when the left wing struck a parked service van as the airplane was taxiing to Gate L-2 at the Ted Stevens Anchorage International Airport, Anchorage, Alaska. The airplane was being operated as a visual flight rules (VFR) scheduled domestic passenger flight under Title 14, CFR Part 121, when the accident occurred. The airplane was operated as Flight 829, by ERA Aviation Inc., Anchorage. The captain and first officer, and the 17 passengers, were not injured. Visual meteorological conditions prevailed. A VFR flight plan was filed. The flight originated at the Kenai Municipal Airport, Kenai, Alaska, about 0855.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on April 10, the operator's director of safety reported that the airplane was taxiing to the gate area after landing. The airplane was being marshaled into a parking spot at Gate L-2 by a single ground guide utilizing hand signals. The director of safety reported that no other airplanes were parked nearby, and wing-walkers were not utilized. As the airplane was being positioned by the ground guide, the underside of the left wing struck the top of a parked fleet service van. Inspection of the wing revealed that the outboard flap hinge assembly was displaced upward.

In the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1) submitted by the operator, in the optional Operator/Owner Safety Recommendation section of the report, the director of safety noted: "Wing walker was not available or used as required by company policy. Marshaller was available and used, but was standing at the parking spot. Use wing walkers anytime an aircraft is within 20 feet of an obstacle."

During a telephone conversation with the NTSB IIC on April 18, the operator's director of quality control reported that the repair to the left wing required replacement of the outboard rib, the outboard flap hanger assembly, and replacement of wrinkled upper wing skin near the wingtip.

Aircraft

Registration
N886EA
Reported as
de Havilland DHC-6
Category
Airplane
Serial number
756
Airframe hours
42,442
Engine
Pratt & Whitney Canada PT6A-27, 620 horsepower, turbo prop
Damage
Substantial damage
Flight
Part 121
Registered owner
Era Aviation Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · April 3, 2003 · 46 hours before
Departed
PAEN · Kenai, AK
Destination
PANC · Anchorage, AK
Flight plan
VFR
Airport
PANC · Anchorage International

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
31
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Last flight review
April 3, 2003
Seat
Left
Flight hours
3,200 total · 1,427 in this make and model · 125 in the last 90 days · 40 in the last 30 days · 4 in the last 24 hours
Role
Co-pilot
Age
28
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
November 10, 2002
Seat
Rear
Flight hours
4,794 total · 1,850 in this make and model · 2,903 as pilot in command · 158 in the last 90 days · 50 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
315° at 4 knots
Visibility
10 statute miles
Lowest ceiling
14,000 ft broken
Temperature
34 °F, dew point 21 °F
Altimeter
29.61 inHg
Observed at
PANC

FAA reports on this event · 1

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