Accident Cessna 185C N2690Z, Thursday 12 August 1993

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Date:	Thursday 12 August 1993
Time:	10:00 LT
Type:	Cessna 185C
Owner/operator:	Pere Air
Registration:	N2690Z
MSN:	1850690
Total airframe hrs:	4115 hours
Engine model:	Continental IO-470R
Fatalities:	Fatalities: 0 / Occupants: 3
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Stibnite, ID - United States of America
Phase:	Landing
Nature:	Unknown
Departure airport:	Ketchum, ID (KSUN)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
DURING LANDING ROLLOUT THE PILOT LOST LEFT BRAKE PRESSURE AND THE AIRCRAFT GROUND LOOPED. POST CRASH EXAMINATION REVEALED THAT THE 'B-NUT' ON THE LEFT BRAKE LINE, WHERE IT PASSES THROUGH THE FUSELAGE, WAS LOOSE. ADDITIONALLY, HYDRAULIC FLUID WAS OBSERVED INSIDE THE FUSELAGE IN THE VICINITY OF THE FITTING, AND THE LEFT BRAKE MASTER CYLINDER CONTAINED ONLY A SMALL AMOUNT OF FLUID. THE PILOT REPORTED THAT HE WAS ASSISTING A MECHANIC IN MAINTENANCE ON THE LEFT LANDING GEAR SUPPORT BRACKET AND COULD NOT REMEMBER TIGHTENING THE 'B-NUT' OR IF THE MECHANIC INSPECTED THE WORK HE ACCOMPLISHED.

Probable Cause: LEAKAGE OF HYDRAULIC BRAKE FLUID AND IMPROPER MAINTENANCE BY THE PILOT IN COMMAND. A FACTOR CONTRIBUTING TO THE ACCIDENT WAS INADEQUATE INSPECTION BY THE MECHANIC.

Accident investigation: