ASN Wikibase Occurrence # 285106
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| Date: | Thursday 29 March 2007 |
| Time: | 10:15 LT |
| Type: |  Piper PA-18-150 |
| Owner/operator: | U.S. Department of Agriculture |
| Registration: | N744 |
| MSN: | 18-8309009 |
| Year of manufacture: | 1982 |
| Total airframe hrs: | 11955 hours |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sweetwater, TX -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | Sweetwater Airport, TX (SWW/KSWW) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The 6,127-hour commercial pilot discovered that the throttle was locked and would not advance when he attempted to add power after leveling off during an enroute descent. The airplane continued to descend, and the pilot tried to "wiggle the throttle back and forth" but the throttle would not advance beyond 1,000 RPM. During the subsequent forced landing, just prior to touch down, the pilot pushed the throttle forward very hard and felt the throttle pop loose, and the pilot was able to move the throttle aft and forward; however, with no affect to the engine RPM. The airplane landed on rough and uneven terrain and the airplane nosed-over during the ground roll. A review of the airframe logbooks noted the aircraft had previously been repaired after previous mishaps. Additionally, the airframe had completely been rebuilt in July 2003, including replacement of the firewall during the scheduled overhaul for the airplane. A newly overhauled engine had been installed approximately 3.5 hours prior to the accident. The investigation revealed that a throttle cable support angle was missing from the firewall. No evidence was found to confirm that the support angle was installed when the engine firewall was last replaced.
Probable Cause: The loss of engine power due to the failure of the throttle lever/linkage. A contributing factor was the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB DFW07TA089
History of this aircraft
Other occurrences involving this aircraft
| 30 January 2006 | N744 | U.S. Department Of Agriculture | 0 | Gail, Texas | |
sub |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Oct-2022 17:50 | ASN Update Bot | Added |
| 12-Nov-2022 01:42 | Ron Averes | Updated [Operator, Location, Narrative] |
Corrections or additions? ... Edit this accident description
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