ASN Wikibase Occurrence # 145512
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| Date: | Friday 23 March 2012 |
| Time: | 11:00 |
| Type: |  Cirrus SR22T |
| Owner/operator: | PlaneSmart! Aviation, LLC |
| Registration: | N229TX |
| MSN: | 0076 |
| Year of manufacture: | 2011 |
| Total airframe hrs: | 482 hours |
| Engine model: | Continental TSIO-550-K |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Addison Airport - KADS, Dallas, TX -
 United States of America
|
| Phase: | Taxi |
| Nature: | Private |
| Departure airport: | Addison, TX (ADS) |
| Addison, TX (ADS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane experienced an electrical fire while taxiing to the departure runway. A postaccident examination revealed that a grounded shield wire was improperly attached to the alternator’s auxiliary power terminal instead of the alternator’s case-ground connection during recent maintenance. The mechanic who had recently removed the alternator stated that he did not identify the location of the wire harness leads during removal and that the manufacturer’s documentation did not depict where the power shield wire should be attached on the alternator, so he decided to attach the shield wire to the auxiliary power terminal, which was not correct.
The manufacturer’s wiring manual did not depict the optional electrical system wiring configuration, which included the incorporation of the No. 1 alternator power shield wire. As a result of the accident, the airplane manufacturer updated the wiring manual to explicitly account for the shield wires and the unused auxiliary power terminal. Caution messages were added to the maintenance manuals warning mechanics that the airplane might be equipped with cable shielding and, if so, where to connect the shielding on the alternator.
Probable Cause: Maintenance personnel’s improper maintenance, which resulted in the incorrect wiring of the No. 1 alternator and a subsequent electrical system fire during taxi. Contributing to the accident was the airplane manufacturer's inadequate maintenance documentation that did not depict updated electrical system wiring options.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: https://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20120403X00927&key=1
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=229TX&x=0&y=0
https://www.netairspace.com/photos/N229TX/Private/Cirrus_SR22T/ADS_KADS_Dallas_Addison/photo_2375/?sid=6d5d817f82371b4cfecd75583e5edd20
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-May-2012 22:20 | Geno | Added |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 20:27 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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