ASN Wikibase Occurrence # 35808
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| Date: | Monday 16 August 1999 |
| Time: | 18:00 LT |
| Type: |  Piper PA-30 Twin Comanche |
| Owner/operator: | Adventure Aero, LLC. |
| Registration: | N7178Y |
| MSN: | 30-198 |
| Year of manufacture: | 1963 |
| Total airframe hrs: | 5331 hours |
| Engine model: | Lycoming IO-320-B1A |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 1.25 miles SW of Holdenville Municipal Airport, Holdenville, Oklahoma -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Ferry/positioning |
| Departure airport: | (F99) |
| Norman, OK (KOUN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to a witness, the twin-engine airplane's takeoff appeared to be 'normal' except for the loud noise, which he believed was coming from the right engine. The noise 'sounded like something rubbing against a metal fan.' The witness stated that 'after the plane was in the air, it started to turn to the left like it was going to gain altitude [and] then suddenly turned right, then it started to lose altitude.' He then lost sight of the airplane as it went behind some trees. Another witness described hearing the airplane overhead 'backfiring, popping.' The witness watched the aircraft for about 1/2 mile until it disappeared behind some trees. The witness continued to hear the engine 'pop' about 20 more times before hearing a 'large backfire, 'pop'' and 10-15 seconds later he 'heard the engines race in rpm (motor revved-up high).' He then heard the airplane impact the ground. According to an insurance application filled out nine months before the accident, the commercial pilot had a total of 507 flight hours, of which 85.6 hours were in multi-engine airplanes. Other than one flight with the operator of the airplane earlier in the day of the accident, the pilot did not have any previous experience in the same make and model as the accident airplane. Flight control continuity was established. The right propeller was found in what appeared to be the feather position. An examination of the engine did not reveal any anomalies that would have resulted in a loss of power.
Probable Cause: the pilot's failure to maintain aircraft control during takeoff initial climb. Factors were the loss of right engine power for undetermined reasons, and the pilot's lack of total experience in the make and model of aircraft.
Accident investigation:
 |
|
Sources:
NTSB FTW99FA222
FAA register: NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X19503&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=7178Y
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:22 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 08-Apr-2017 20:39 | Dr.John Smith | Updated [Time, Aircraft type, Operator, Location, Phase, Departure airport, Destination airport, Source, Narrative] |
| 14-Dec-2017 08:49 | ASN Update Bot | Updated [Time, Operator, Departure airport, Destination airport, Source, Narrative] |
| 07-Apr-2024 18:39 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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