Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Sedona, Arizona 86336
Sunday, October 16, 1988 10:17 MST
NTSB Narrative Summary Released at Completion of Accident
THE PLT & 4 FARE-PAYING PAX WERE ENROUTE TO THE GRAND CANYON NATIONAL PARK FOR AERIAL SIGHTSEEING. AN INTERNAL FAILURE OF THE LEFT MAGNETO (MAG) RESULTED IN A TOTAL LOSS OF ENGINE PWR. THE ACFT COLLIDED WITH TERRAIN & WAS DESTROYED BY GROUND FIRE. THE MAG WAS SUBJECT TO AD 78-09-07 R3 WHICH ADDRESSED IMPULSE COUPLING FAILURE. UPON EXAM IT WAS NOT FOUND TO HAVE BEEN IN COMPLIANCE WITH THE AD. THE AIR TAXI COMPANY HAD TWO EMPLOYEES; AN OWNER/PRESIDENT/PILOT AND A DIRECTOR OF MAINTENANCE/MECHANIC. THE MECHANIC ACKNOWLEDEGED HE FAILED TO FOLLOW THE CURRECT GUIDELINE IN THE CORRECT AD. AS A RESULT, THE IMPULSE COUPLING JAMMED WHEN THE FLYWEIGHT TO STOP PIN CLEARANCE BECAME ZERO. THIS ACTION SHEARED OFF TEETH ON THE ENGINE'S CRANKSHAFT GEAR & DOWEL PIN.
NTSB Probable Cause Narrative
TOTAL FAILURE OF THE MAGNETO'S IMPULSE COUPLING WHICH RESULTED IN A SHEARING OF THE CRANKSHAFT'S IDLER GEAR TEETH AND THE CRANKSHAFT DOWEL PIN.
Event Information
| Type of Event | Accident |
| Event Date | 10/16/1988 |
| Event Day of the Week | Sunday |
| Time of Event | 1017 |
| Event Time Zone | Mountain Standard Time |
| Event City | SEDONA |
| Event State | ARIZONA |
| Event Country | -- |
| Zipcode of the event site | 86336 |
| Event Date Year | 1988 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| 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 | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Witness |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 50 |
| Air Temperature at event time (in degrees celsius) | 20 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Light and Variable |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | 5 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 5 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2469 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Oct 16 1988 12:00AM |
| NTSB Notification Time | 1045 |
| Fiche Number and/or location -used to find docket information | 39389 |
| Date of most recent change to record | Dec 13 2000 12:13PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4113R |
| NTSB Number | LAX89FA014 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | PIPER |
| Aircraft Model | PA-32-300 |
| Aircraft Series Identifier | PA-32-300 |
| Aircraft Serial Number | 32-40432 |
| Certified Max Gross Weight | 3400 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 7 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Jun 29 1988 12:00AM |
| Airframe hours since last inspection | 61 |
| Airframe Hours | 7026 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | ROBERT P JACKSON |
| Aircraft Owner Street Address | P.O. BOX 886 |
| Aircraft Owner City | SEDONA |
| Aircraft Owner State | AZ |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 86336 |
| Operator is an individual? | -- |
| Operator Name | NORTHERN ARIZONA AIRCRAFT |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P.O. BOX 886 |
| Operator City | SEDONA |
| Operator State | AZ |
| Operator Country | |
| Operator Zip code | 86336 |
| Operator Code | EHWA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | SEZ |
| Departure City | SEDONA |
| Departure State | AZ |
| Departure Country | |
| Departure Time | 1002 |
| Departure Time Zone | MST |
| Destination Same as Local Flt | -- |
| Destination Airport Code | SEZ |
| Destination City | SEDONA |
| Destination State | AZ |
| Destination Country | |
| Specific Phase of Flight | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |