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NTSB Report
August 8, 2013 · Cessna 185D · N75LE
North Pole, AK
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
August 8, 2013
Injury Outcomes
No injuries (1 uninjured)
Location
North Pole, AK
Aircraft
Cessna 185D
Tail Number
N75LE
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC13CA075
The pilot had completed his before takeoff checks, and was taxiing the tailwheel-equipped airplane onto the runway for departure. He added power and initiated a left turn to align the airplane with the runway, while attempting to stop the turn the right brake failed and the airplane ground looped striking the right wing on the gravel runway. The airplane sustained substantial damage to the right wing and aileron. An examination of the right brake master cylinder revealed that the right brake would not hold pressure and the O-ring within the master cylinder had dried out allowing brake fluid to leak past.
NTSB Probable Cause
The malfunction of the right main wheel brake during taxi due to a faulty O-ring in the right brake pedal master cylinder.
Full Narrative
The pilot had completed his before takeoff checks, and was taxiing the tailwheel-equipped airplane onto the runway for departure. He added power and initiated a left turn to align the airplane with the runway, while attempting to stop the turn the right brake failed and the airplane ground looped striking the right wing on the gravel runway. The airplane sustained substantial damage to the right wing and aileron. An examination of the right brake master cylinder revealed that the right brake would not hold pressure and the O-ring within the master cylinder had dried out allowing brake fluid to leak past.
Flight
Event TypeAccident
Event Time14:00 AKDT
Nearest AirportBradley Sky-Ranch (0nm)
Runway15
Runway Length4100 ft
Runway Width60 ft
Flight Plan FiledVFR
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 185D
Tail NumberN75LE
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCont Motor · I0-520 SERIES · Reciprocating · 300
Seats6
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 63 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point37 C
Altimeter29.64 inHg
Observation Time16:53
Weather SourceWFAC