ASN Wikibase Occurrence # 40328
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| Date: | Friday 24 June 1994 |
| Time: | 10:05 LT |
| Type: |  Piper PA-31-325 Navajo C/R |
| Owner/operator: | Thorne, Roscoe M. |
| Registration: | N27872 |
| MSN: | 31-7912031 |
| Engine model: | Lycoming TIO-540-F2BD |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Palm Beach County Park Airport, Lantana, Florida -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AIRPLANE WAS OBSERVED TO ROTATE ABOUT 3,217 FT DOWN THE 3,746-FT RUNWAY. ONE OR BOTH ENGINES WERE HEARD RUNNING ROUGH. THE AIRPLANE CLIMBED TO ABOUT 300 FT AGL, BANKED LEFT, PITCHED NOSE DOWN AND IMPACTED THE GROUND. DURING THE INVESTIGATION, THE LEFT ENG OPERATED TO FULL RATED RPM AFTER REPLACEMENT OF THE DAMAGED IGNITION HARNESS, ADJUSTMENT OF THE TURBOCHARGER DENSITY CONTROLLER, AND ADJUSTMENT OF THE MAGNETO-TO-ENG TIMING. THE RIGHT ENG ALSO OPERATED NORMALLY AFTER REPLACEMENT OF THE MAGNETO, IGNITION HARNESS, AND ENG-DRIVEN FUEL PUMP. THE DENSITY CONTROLLER REQUIRED ADJUSTMENT TO OBTAIN FULL RATED RPM. THE #3 CYL FUEL INJECTOR NOZZLE WAS ALSO PARTIALLY BLOCKED BY CONTAMINANT. THE RIGHT ENG MAGNETO CONTACT ASSEMBLIES OPERATIONALLY CHECKED OK. THE CAPACITORS WERE HEAT DAMAGED. RIGHT ENG MAGNETO-TO-ENG TIMING AND INTERNAL TIMING OF THE MAGNETO WERE NOT DETERMINED. PILOT'S TOXICOLOGICAL RESULTS WERE POSITIVE FOR BUTALBITAL (1.768 UG/ML BLOOD, 0.553 UG/ML URINE), AND ALSO POSITIVE FOR ACETAMINOPHEN & SALICYLATE (ASPIRIN) IN URINE. BUTALBITAL IS A PRESCRIPTION MEDICATION (BARBITURATE) NOT APPROVED FOR FLYING.
Probable Cause: THE PILOT'S IMPAIRMENT OF JUDGMENT AND PERFORMANCE DUE TO DRUGS, HIS FAILURE TO ABORT THE TAKEOFF AFTER EXPERIENCING REDUCED TAKEOFF PERFORMANCE, AND HIS FAILURE TO MAINTAIN MINIMUM CONTROL SPEED. FACTORS IN THE ACCIDENT WERE: A PARTIAL LOSS OF ENGINE POWER DUE TO IMPROPER MAGNETO-TO-ENGINE TIMING, AND A PARTIALLY BLOCKED FUEL NOZZLE.
Accident investigation:
 |
|
Sources:
NTSB MIA94FA167
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=27872
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 04-Jun-2015 04:38 | Dr. John Smith | Updated [Time, Operator, Location, Departure airport, Source, Damage, Narrative] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 11-Oct-2017 14:37 | Dr. John Smith | Updated [Time, Location, Departure airport, Source, Damage, Narrative] |
| 10-Apr-2024 06:30 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Damage, Narrative, Category, Accident report] |
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