ASN Wikibase Occurrence # 39022
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| Date: | Tuesday 23 June 1992 |
| Time: | 12:25 LT |
| Type: |  WACO UPF-7 |
| Owner/operator: | Out Of Arizona Biplane Tours |
| Registration: | N29926 |
| MSN: | 5423 |
| Engine model: | CONTINENTAL W670-6A |
| Fatalities: | Fatalities: 2 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Sedona, AZ -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | (KSEZ) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS PROVIDING FOR HIRE SIGHTSEEING TOURS OF A SCENIC AREA OF SEDONA, ARIZONA, IN A VINTAGE BIPLANE. THE FRONT COCKPIT HAD BEEN MODIFIED TO ACCOMMODATE TWO PASSENGERS. NO RECORD OF AN APPROVED SEAT MODIFICATION IN ACCORDANCE WITH FACTORY SPECIFICATIONS OR A FAA FIELD APPROVAL WAS LOCATED. THE PILOT STATED THAT HE DEPARTED WITH 10 GALLONS OF FUEL ON BOARD FOR A 30 MINUTE TOUR. HE COULD NOT SAY HOW THE FUEL WAS DISTRIBUTED IN THE TANKS. HE ALSO SAID HE DID NOT USE A DIP STICK OR OTHER MEASURING DEVICE TO QUANTIFY THE FUEL LEVEL, BUT ESTIMATED THE TOTAL FUEL BASED ON CONSUMPTION ESTIMATES FROM PRIOR FLIGHTS. THE AIRPLANE HAS TWO 25 GALLON FUEL TANKS IN THE TOP WINGS WITH FLOAT SIGHT GAUGES UNDERWING. THE AIRCRAFT MAINTENANCE MANUAL STATES THAT 10 GALLONS OF FUEL IS THE MINIMUM REQUIRED FOR TAKEOFF IN THE TANK SELECTED. REGARDING THE SIGHT GAUGES, THE MANUAL STATES: 'AN ACCURATE READING CANNOT BE OBTAINED FROM THE GASOLINE GAUGES ON THE GROUND'. BOTH GAUGES WERE CONTAMINATED WITH A TAR LIKE SUBSTANCE ADHERING TO THE WIRE INDICATORS, WHICH RESEMBLED AN UNIDENTIFIED COATING FOUND INSIDE THE FUEL TANKS. EXAMINATION OF THE FUEL SYSTEM DISCLOSED THAT ONLY RESIDUAL FUEL REMAINED IN THE FUEL TANKS AND LINES TO THE ENGINE. FUEL SYSTEM CONTINUITY WAS ESTABLISHED.
Probable Cause: FUEL EXHAUSTION DUE TO THE PILOTS INADEQUATE PREFLIGHT PLANNING AND HIS FAILURE TO REFUEL THE AIRPLANE PRIOR TO DEPARTURE. FACTORS IN THE ACCIDENT WERE: 1) THE UNRELIABLE FUEL SIGHT GAUGES WHICH WERE CONTAMINATED WITH A TAR LIKE RESIDUE WHICH MAY HAVE PROVIDED AN ERRONEOUS INDICATION OF FUEL IN THE SYSTEM, 2) INADEQUATE AIRPLANE MAINTENANCE, AND, 3) THE UNSUITABLE TREE COVERED NATURE OF THE TERRAIN WHERE THE FORCED LANDING WAS ATTEMPTED.
Accident investigation:
 |
|
Sources:
NTSB LAX92FA257
History of this aircraft
Other occurrences involving this aircraft
| 5 August 1991 | N29926 | Private | 0 | Manning, SC | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 11-Apr-2024 06:20 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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