ASN Wikibase Occurrence # 289974
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| Date: | Tuesday 11 June 2013 |
| Time: | 08:15 LT |
| Type: |  Titan T-51 Mustang |
| Owner/operator: | Private |
| Registration: | N548RR |
| MSN: | M08SV6SOHK0142 |
| Year of manufacture: | 2012 |
| Total airframe hrs: | 50 hours |
| Engine model: | Honda 3.5 L |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | St Francis, Kansas -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Test |
| Departure airport: | St Francis-Cheyenne County Municipal Airport, KS (KSYF) |
| St Francis-Cheyenne County Municipal Airport, KS (KSYF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot had been flying the amateur-built airplane for about 15 minutes at a cruise altitude of between 4,000 and 5,000 ft when he attempted to slow the engine rpm by pulling the propeller control back; however, this had no effect on the engine rpm. The pilot attempted to slow the rpm several times, but the propeller then cycled to "full bite" and remained that way until he performed a wheels-up landing on a rough road.
The airplane had accumulated 50 hours of total flight time at the time of the accident. During a postaccident test run, the engine ran normally. Oil was drained from the propeller gearbox, and it presented a used appearance. The propeller governor was subsequently bench tested and did not meet the manufacturer's test specifications. A disassembly of the governor revealed the presence of foreign debris and wear marks on several parts of the governor. After the governor was cleaned and reassembled, it was bench tested again, and it operated normally. The pilot reported that, after the accident, the airplane was repaired, the engine and a new governor were installed, and the airplane operated without any anomalies. The foreign debris likely caused excessive wear inside the propeller governor, which subsequently led to its in-flight failure.
Probable Cause: Foreign debris in the propeller governor, which led to excessive wear in the governor and its subsequent in-flight failure.
Accident investigation:
 |
|
Sources:
NTSB CEN13LA346
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Oct-2022 06:24 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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