ASN Wikibase Occurrence # 159243
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| Date: | Saturday 24 August 2013 |
| Time: | 16:30 |
| Type: |  Piper PA-28-140 Cherokee |
| Owner/operator: | Private |
| Registration: | N32582 |
| MSN: | 28-7525086 |
| Year of manufacture: | 1974 |
| Total airframe hrs: | 3880 hours |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Field in Tehatchapi, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Tehachapi, CA (L94) |
| Fullerton, CA (FUL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot/owner based the single-engine airplane at an airport that was on flat terrain at an elevation of about 100 ft mean sea level (msl). He flew to another airport that was located near the perimeter of the southeast quadrant of a geographic bowl at an elevation of 4,220 ft msl. The pilot had not previously flown into or out of the destination airport and had only flown one time into and out of a high-elevation airport (about 6,700 ft msl). The flight to the destination was uneventful. Later that afternoon, the pilot performed a weight-and-balance check and obtained a weather briefing before departure for the trip home. He did not conduct any density altitude, takeoff, or climb performance calculations. The pilot reported that the takeoff roll and initial climbout were normal, but when he turned onto the left crosswind leg, the airplane no longer seemed to be climbing. The airplane struck terrain about ½ mile from the departure end of the runway. The impact location elevation was about 160 ft above the departure airport elevation. Examination of the airplane, engine, and propeller did not reveal any preexisting mechanical deficiencies or problems that would have precluded normal operation.
Based on the calculated density altitude of about 6,700 ft, the airplane manufacturer’s performance charts indicated that the airplane would require about 3,300 ft to attain an altitude of 50 ft above ground level (agl). The expected initial climb rate was about 310 ft per minute; without any wind or performance decrements, the airplane would have been about 115 ft agl when it reached the impact location. Performance decrements included loss of lift in the turn; possible less-than-ideal airframe, engine, propeller, or pilot performance; and adverse wind, including downdrafts and the loss of the headwind component during the turn.
The departure airport was equipped with two parallel runways and no air traffic control tower. A dedicated traffic advisory radio frequency and opposite-direction traffic patterns were used to separate the airport’s sailplane and powered airplane operations. In keeping with the airport’s procedures, the pilot used runway 27L and attempted to fly a left traffic pattern for departure. Review of the local topography revealed that the terrain south of the airport rose relatively rapidly, while the terrain both west and north remained about the airport elevation for several miles. Had the pilot conducted predeparture climb performance calculations, he would have determined that the airplane’s climb capability was significantly reduced by the high density altitude. That, in turn, should have prompted him to select a departure path that remained clear of rising terrain. Two available options included a straight-out departure from runway 27L or a right turn from either runway 27L or 27R once the pilot was assured that a right turnout would not create a traffic conflict with the sailplanes using the airport.
Probable Cause: The pilot's failure to conduct predeparture airplane performance planning for a departure from a high density altitude location, which resulted in his selection of a flightpath toward rising terrain that the airplane was not capable of outclimbing.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Aug-2013 04:29 | Geno | Added |
| 27-Aug-2013 04:34 | Geno | Updated [Source] |
| 05-Sep-2013 23:26 | Geno | Updated [Time, Nature, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 29-Nov-2017 08:58 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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