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July 12, 2023 · Dehavilland DHC-2 · N814DW
Mccarthy, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 12, 2023
Injury Outcomes
No injuries (2 uninjured)
Location
Mccarthy, AK
Aircraft
Dehavilland DHC-2 (1949)
Tail Number
N814DW
Operator
Wrangell Mountain Air
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC23LA052
The pilot reported that during the landing roll on a gravel-covered airstrip, the airplane veered left, went through an embankment, and came to rest upright. A postaccident examination of the airplane revealed the right brake caliper bolts failed in overload. The lower bolt was broken in half, the upper bolt was not located, and the brake caliper was located in brush. Given that the airplane is routinely operated from rough, uneven, gravel-covered, off airport sites, it is likely that the brake caliper and bolts sustained impact damage, resulting in the failure of the attachment hardware.
NTSB Probable Cause
A failure of the right brake caliper bolts during landing, which resulted in a runway excursion and subsequent impact with terrain.
Full Narrative
The pilot reported that during the landing roll on a gravel-covered airstrip, the airplane veered left, went through an embankment, and came to rest upright. A postaccident examination of the airplane revealed the right brake caliper bolts failed in overload. The lower bolt was broken in half, the upper bolt was not located, and the brake caliper was located in brush. Given that the airplane is routinely operated from rough, uneven, gravel-covered, off airport sites, it is likely that the brake caliper and bolts sustained impact damage, resulting in the failure of the attachment hardware.
Flight
Event TypeAccident
Event Time18:30 AKDT
Nearest Airport0nm
Flight Plan FiledCvfr
Flight Plan ActivatedUnknown
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDehavilland DHC-2
Tail NumberN814DW
Aircraft CategoryAir
DamageSubstantial
OperatorWrangell Mountain Air
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsPratt & Whitney · R-985-AN-14B · Reciprocating · 450
Seats9
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 73 · Second Class · None
Crew 2None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point55 F / 46 F
Altimeter29.95 inHg
Observation Time09:53
Weather SourceWFAC