ASN Wikibase Occurrence # 294017
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| Date: | Sunday 13 March 2005 |
| Time: | 16:57 LT |
| Type: |  Piper PA-28-140 |
| Owner/operator: | Private |
| Registration: | N9956W |
| MSN: | 28-23503 |
| Year of manufacture: | 1967 |
| Total airframe hrs: | 3738 hours |
| Engine model: | Lycoming O-320-E2A |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Big Bear City, California -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Big Bear City, CA (L35) |
| Murrieta, CA (F70) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane encountered a stall/mush condition during the takeoff initial climb and descended until colliding with a roadside guardrail about 1 mile beyond the end of the runway. The guardrail was located beneath power lines having an approximate elevation of 57 feet above the airport's elevation. Prior to takeoff, the pilot added 25 gallons of fuel for the planned 43-mile (direct) flight. This increased the airplane's gross weight to within 34 pounds of its maximum certificated gross weight. The pilot heard the airport's automated weather broadcast that the density altitude was at least 8,100 feet. The pilot did not consult the available Piper "Owner's Handbook" that indicated the maximum elevation published for takeoff was for a 7,000-foot density altitude condition. At this altitude, about 3,800 feet are required to takeoff and clear a 50-foot obstacle. At an 8,100-foot density altitude, an undetermined additional distance would be required. The pilot allowed the passenger to perform the takeoff. The passenger held a student pilot certificate, had about 15 hours of total flight time, and had not soloed. The stall warning light illuminated several times during the approximately 2-minute-long flight, and the pilot took over the controls from the passenger. A witness observed the airplane 15 to 20 seconds before it crashed. The witness noted that the airplane was in a nose high pitch attitude, with its nose 10 to 15 degrees above the horizon. Then, the airplane's nose lowered, and the airplane descended until impacting the guardrail. The pilot subsequently reported that the maximum altitude gained during the flight was about 200 feet above ground level, following which he encountered a downdraft. The airplane's "Owner's Handbook" indicates that at an 8,100-foot density altitude, the maximum rate of climb is about 325 feet per minute. No preimpact mechanical malfunctions or failures were identified during examination of the wreckage.
Probable Cause: The pilot's failure to maintain adequate airspeed that resulted in an inadvertent stall/mush during initial climb. Contributing factors were the pilot's inadequate preflight preparations and the high density altitude.
Accident investigation:
 |
|
Sources:
NTSB LAX05FA114
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 16:18 | ASN Update Bot | Added |
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