Aircraft Accident/Incident Report

Talkeetna, Alaska 99676
Tuesady, July 31, 2007 15:30 AKD

NTSB Narrative Summary Released at Completion of Accident

The float-equipped airplane was being operated by the commercial pilot as a VFR cross-country flight in conjunction with his guiding service. The pilot said that he departed one lake en route to another, and about 20 minutes into the flight, the engine went to idle rpm. He said he pushed the throttle forward, and turned the airplane toward a lake, but the airplane descended into trees short of the lake. The airplane sustained extensive damage to the wings and fuselage. The pilot said that there were no known mechanical problems with the airplane prior to the flight. The airplane was examined, and it was found that the support shaft for the throttle and mixture bell cranks was missing, which disconnected the throttle control and allowed the engine to go to idle. The air induction box assembly was examined by the NTSB investigator, and it was discovered that the air box had been repaired with incorrectly substituted parts. The air box (PN 1650012-1) was the correct air box; however, a weld repair had been performed around the shaft support bushings on both sides of the box. The correct solid shaft bushings had been replaced with earlier generation roller bearings. The inappropriate installation did not allow for the support shaft to be properly pinned in place, and did not allow for the redundant safety of the correct installation. The correct parts installation would preclude the support shaft from migrating out of the air box if either shaft end spacer were missing. An examination of the airplane's maintenance log books did not reveal any entries pertaining to the air box repair.

NTSB Probable Cause Narrative

The loss of engine power during cruise flight due to an improperly repaired airbox.

Event Information

Type of Event Accident
Event Date 7/31/2007
Event Day of the Week Tuesday
Time of Event 1530
Event Time Zone --
Event City Talkeetna
Event State ALASKA
Event Country --
Zipcode of the event site 99676
Event Date Year 2007
Event Date Month 7
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 621521N
Event Location Longitude 1495401W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height 2500
Lowest Non-Ceiling Height 2500
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 16
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 5
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 170
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.02
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 23200
NTSB Notification Source FAA Anchorage, ROC
NTSB Notification Date Jul 31 2007 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Mar 31 2008 11:52AM
User who most recently changed record NTSB\johb
Basic weather conditions Visual Meteorological Cond
FAA District Office Anchorage FSDO-03

Aircraft Involved

Aircraft #1

Aircraft Registration Number N70020
NTSB Number ANC07LA071
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Cessna
Aircraft Model 185E
Aircraft Series Identifier --
Aircraft Serial Number 18501895
Certified Max Gross Weight 3340
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 4
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jul 1 2006 12:00AM
Airframe hours since last inspection --
Airframe Hours 3693
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name James Bailey
Aircraft Owner Street Address --
Aircraft Owner City Eagle River
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99577
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Other Work Use
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code --
Departure City Stephan Lake
Departure State AK
Departure Country USA
Departure Time 1500
Departure Time Zone ADT
Destination Same as Local Flt --
Destination Airport Code PALH
Destination City Lake Hood
Destination State AK
Destination Country USA
Specific Phase of Flight Emergency descent/landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Mar 4 2008 11:03AM
User who most recently changed record STAM
Since inspection or accident Last Inspection
Event Location Runway Number and Location NA
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --