ASN Wikibase Occurrence # 131909
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| Date: | Wednesday 7 July 1993 |
| Time: | 20:37 LT |
| Type: |  Piper PA-34-200 |
| Owner/operator: | Air Desert Pacific |
| Registration: | N1392T |
| MSN: | 34-7250306 |
| Total airframe hrs: | 3573 hours |
| Engine model: | Lycoming IO-360-C1E6 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | La Verne, CA -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE FLIGHT INSTRUCTOR (CFI) SAID THAT DURING THE INITIAL CLIMB AND AFTER GEAR RETRACTION THE LEFT ENGINE LOST POWER. HE TOOK CONTROL AND FEATHERED THE LEFT PROP, BUT WAS UNABLE TO ESTABLISH A SINGLE-ENGINE RATE-OF-CLIMB. HE ATTEMPTED TO FLY THROUGH A LOW POINT IN HILLY TERRAIN, BUT THE AIRPLANE COLLIDED WITH A POWER LINE AND CRASHED INTO A RAVINE. THE LANDING GEAR WAS FOUND IN THE EXTENDED AND LOCKED POSITION, AND A GROUND WITNESS SAW THE GEAR EXTENDED DURING THE FLIGHT. THE LEFT ENGINE FUEL FLOW DIVIDER WAS FOUND TO BE PARTIALLY PLUGGED WITH A GREY/WHITE MATERIAL (CONTAMINATION). LABORATORY ANALYSIS IDENTIFIED THE MATERIAL AS POLYETHYLENE TEREPHTHALATE (PET), A THERMOPLASTIC MATERIAL. ORIGIN OF THE CONTAMINATE WAS UNKNOWN. ACCORDING TO THE AIRCRAFT SINGLE ENGINE PERFORMANCE CHART, THE AIRPLANE SHOULD HAVE BEEN ABLE TO CLIMB AT ABOUT 150 FEET PER MINUTE. A PILOT-RATED PASSENGER IN THE REAR HEARD THE STALL HORN SOUNDING AFTER THE CFI TOOK CONTROL AND ATTEMPTED TO ESTABLISH A SINGLE-ENGINE CLIMB. VYSE IS 103 MPH AND VSO IS 73 MPH.
Probable Cause: THE FLIGHT INSTRUCTOR'S FAILURE TO OBTAIN/MAINTAIN BEST THE SINGLE-ENGINE RATE-OF-CLIMB AIRSPEED, AND HIS FAILURE TO ENSURE THAT THE LANDING GEAR WAS RETRACTED. A FACTOR RELATED TO THE ACCIDENT WAS CONTAMINATION IN THE FUEL SYSTEM, WHICH BLOCKED FUEL FLOW THROUGH THE FLOW DIVIDER AND RESULTED IN FUEL STARVATION TO ONE ENGINE.
Accident investigation:
 |
|
Sources:
NTSB LAX93FA282
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 12:43 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Source, Narrative, Category, Accident report] |
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