ASN Wikibase Occurrence # 189489
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| Date: | Tuesday 23 August 2016 |
| Time: | 15:00 |
| Type: |  Progressive Aerodyne Searey |
| Owner/operator: | Private |
| Registration: | N801SR |
| MSN: | 1MK283 |
| Year of manufacture: | 2001 |
| Total airframe hrs: | 1058 hours |
| Engine model: | Rotax 914ULS |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sebring Regional Airport, FL -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Sebring, FL (SEF) |
| Sebring, FL (SEF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During initial climb on an instructional flight in the experimental amateur-built airplane, about 200 ft above ground level, the engine began running rough. The flight instructor immediately decreased the airplane’s angle of attack and the engine subsequently experienced a total loss of power. The flight instructor tried to land on the remaining runway; however, the airplane landed hard and struck an embankment.
Examination of the airplane revealed wiring that contained mismatched wire gauges and splices throughout the wiring harnesses. The ground wire for the master arm solenoid was disconnected from the back of the ignition switch. Without this ground wire, the battery was disconnected from the airplane’s electrical system. The airplane’s rectifier kept the fuel boost pumps running per the wiring diagrams; however, a postaccident engine run revealed that the rectifier was weak and only displacing 12.3 volts, rather than its nominal output voltage of 13.5 /- 0.2 volts. It is likely that, during takeoff, the ground wire became disconnected from the ignition switch and the weak rectifier could not adequately supply the high electrical load requirements imposed by the fuel boost pumps, the landing gear motors retracting the gear, and the strobe lights. This degraded the performance of the fuel boost pumps, resulting in fuel starvation and a total loss of engine power.
Probable Cause: A disconnected ground wire during initial climb, which degraded the fuel boost pumps’ performance and resulted in a total loss of engine power due to fuel starvation.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Aug-2016 04:30 | Geno | Added |
| 24-Aug-2016 15:25 | Aerossurance | Updated [Time, Registration, Cn, Location, Destination airport, Source, Narrative] |
| 24-Aug-2016 15:29 | Aerossurance | Updated [Operator] |
| 16-Sep-2018 19:09 | ASN Update Bot | Updated [Time, Nature, Departure airport, Destination airport, Source, Damage, Narrative, Accident report, ] |
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