ANC90LA062

NTSB accident investigation · Piper PA-31-350 · Deadhorse, AK · April 17, 1990

Accident · No injuriesLimited investigationFinal report
Date
April 16, 1990, 18:04 local (Apr 17, 1990, 02:04 UTC)
Place
Deadhorse, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4109EPiper PA-31-350
Weather
Visual (VMC) · Day
Status
Completed · report October 7, 1992
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19900416009509A
Case key
5357

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

Inadequate maintenance and inspection of the nose baggage door.

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.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Door,cargo/baggage - failure,partialCause
Door,cargo/baggage - unlatchedCause
Door,cargo/baggage - unlockedCause
Maintenance,inspection - inadequateCompany maintenance personnelCause
In flight collision with objectTakeoff - initial climb

Analysis

During the initial climb the nose baggage door opened, and an engine cover separated and struck the horizontal stabilizer. The baggage door handle latching mechanism spring that exerts pressure to close the handle was found missing. The operator had also modified the latching mechanism to include a non-approved safety device designed to prevent inadvertent opening of the baggage door. The operator did not require that the baggage door be locked for flight, and keys were not available.

Aircraft

Registration
N4109E
Reported as
Piper PA-31-350
Category
Airplane
Serial number
31-8353003
Airframe hours
4,019
Engine
Lycoming TIO-540-J, 350 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Cape Smythe Air Service
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · April 5, 1990 · 25 hours before
Destination
BTI · Barter Island, AK
Flight plan
Company VFR
Airport
PASL · Deadhorse

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
30
Certificates
Commercial, Flight engineer, Airline transport, Flight instructor
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
4,988 total · 235 in this make and model · 4,014 as pilot in command · 227 in the last 90 days · 101 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 12 knots
Visibility
4 statute miles
Lowest ceiling
None
Temperature
25 °F

FAA reports on this event · 1

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

Other investigations on N4109E · 2

Matched to the same aircraft by N-number and date.