ASN Wikibase Occurrence # 385475
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| Date: | Sunday 5 August 2001 |
| Time: | 20:15 LT |
| Type: |  Cessna 336 |
| Owner/operator: | Robert Howard |
| Registration: | N3838U |
| MSN: | 336-0138 |
| Year of manufacture: | 1963 |
| Engine model: | Continental IO-360-A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Palmdale, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Lancaster-William J Fox Airport, CA (WJF/KWJF) |
| El Monte-San Gabriel Valley Airport, CA (EMT/KEMT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane experienced a loss of engine power in the aft engine and collided with a guardrail during an off-airport emergency landing on a highway. The pilot flew the airplane earlier that afternoon with no mechanical discrepancies noted. After takeoff and leveling off at 4,500 feet, the pilot thought he noticed a loss of engine power in both engines because he was unable to maintain altitude. A forced landing was performed on a highway and the airplane went through a guardrail. A post accident examination revealed the primers were left unlocked with the aft engine primer pulled out approximately 1 inch. Black sooty deposits were discovered on the rear engine spark plugs. The primer is as an optional feature to assist in cold weather operations.
Probable Cause: The pilot's inadequate preflight inspection of the primer controls, resulting in excessive fuel flow, spark plug fouling, and loss of engine power in the aft engine.
Accident investigation:
 |
|
Sources:
NTSB LAX01FA271
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Apr-2024 19:00 | ASN Update Bot | Added |
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