ASN Wikibase Occurrence # 153601
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Wednesday 27 February 2013 |
| Time: | 15:53 |
| Type: |  Piper PA-32-300 Cherokee Six |
| Owner/operator: | Private |
| Registration: | N1953H |
| MSN: | 32-7740044 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 4014 hours |
| Engine model: | Lycoming IO-540-K1G5 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | A mile south of Sanford-Lee County Regional Airport - KTTA, Sanford, N -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Siler City, NC (5W8) |
| Sanford, NC (TTA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The private pilot was in the traffic pattern at the intended destination airport when the airplane experienced a loss of engine throttle control. Unable to reach the runway, he elected to perform a forced landing in a nearby field. During the landing, the airplane struck a fence post, which resulted in substantial damage to the left wing of the airplane.
Postaccident examination revealed that the throttle lever clevis and throttle cable became separated from the throttle arm, which resulted in the engine being unresponsive to throttle input; thus, the pilot could not apply power to the engine from the idle position. No evidence of metal deformation existed on either the throttle lever clevis or on the throttle cable; however, examination of the cotter pin revealed that one prong was separated and unable to be located. Examination of the remaining portion of the cotter pin revealed that it was twice as long as manufacturer-approved guidance required. Examination of the clevis for the propeller cable linkage revealed that the cotter pin prongs exceeded Federal Aviation Administration Advisory Circular 43-13-1B guidance by allowing the prong to exceed the pin diameter and the cotter pin prongs were not seated firmly against the shank. A review of maintenance records did not reveal when the cotter pin was replaced. The hardware was likely installed using the incorrect safetying technique and the improper length of cotter pin. This allowed the prong to become caught and subsequently fracture on nearby hardware, which resulted in the cotter pin becoming unsecured and separating from the linkage pin. Subsequently, the linkage pin detached, which allowed the throttle lever clevis and cable to separate from each other. The last annual inspection occurred 2 weeks and less than 1 flight hour before the accident. It is likely that the mechanic did not detect the incorrect cotter pin and safetying technique due to its location; the location was such that it would have been difficult for the mechanic to see.
Probable Cause: The installation of an incorrect length of cotter pin on the throttle linkage clevis pin by maintenance personnel at an undetermined time, which resulted in the pin coming loose and the loss of throttle control.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Feb-2013 09:11 | gerard57 | Added |
| 28-Feb-2013 11:04 | gerard57 | Updated [Aircraft type] |
| 28-Feb-2013 11:04 | harro | Updated [Aircraft type, Cn, Operator] |
| 28-Feb-2013 16:46 | Geno | Updated [Time, Location, Phase, Destination airport, Source, Narrative] |
| 01-Mar-2013 01:25 | RobertMB | Updated [Time, Source, Narrative] |
| 17-May-2013 00:13 | rekme | Updated [Departure airport, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 28-Nov-2017 14:08 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation