ASN Wikibase Occurrence # 220047
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| Date: | Monday 24 December 2018 |
| Time: | 14:40 LT |
| Type: |  AgustaWestland A109S Grand |
| Owner/operator: | Servicios Aereos del Altiplano |
| Registration: | XA-BON |
| MSN: | 22174 |
| Fatalities: | Fatalities: 5 / Occupants: 5 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Santa Maria Coronango, Puebla -
 Mexico
|
| Phase: | En route |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Puebla |
| Mexico City | |
| Investigating agency: | SCT |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter impacted a cornfield in the Santa Maria Coronango municipality of Puebla. The helicopter was partially consumed by the post-impact fire and the five occupants (including the Puebla governor) received fatal injuries.
PROBABLE CAUSE:
"Loss of control due to a sudden left roll that was not recovered by the PIC, causing the helicopter to invert in flight and impact the ground".
Although the information available for the investigation was limited due to the lack of flight recorders protected against impacts and severe damage to the helicopter due to the impact against the ground and subsequent fire, based on the available evidence, it was determined that the sudden roll to the left was possibly due to both linear roll actuators extending simultaneously, without being commanded.
CONTRIBUTING FACTORS.
1. Ineffective maintenance practices by the company providing the maintenance service.
2. Inadequate operator safety culture.
3. Operator pressure to continue making flights with knowledge of an intermittent malfunction of the linear roll actuator of the Stability Increase System number two (SAS 2), in addition to the respective requirements established in the Minimum Equipment List (MEL) applicable to helicopter.
4. Insufficient supervision of the maintenance and operation of the helicopter by the Civil Aviation Authority.
Accident investigation:
 |
|
Sources:
http://www.sct.gob.mx/fileadmin/DireccionesGrales/DGAC-archivo/modulo12/informe-final-accidente-xabon.pdf
https://www.washingtonpost.com/world/the_americas/mexico-aviation-crash-claims-puebla-governor-ex-governor/2018/12/24/74b696e0-07d9-11e9-8942-0ef442e59094_story.html?noredirect=on
https://www.aljazeera.com/news/2018/12/mexico-state-governor-senator-husband-die-helicopter-crash-181225015958776.html
http://www.ejecentral.com.mx/desaparece-portal-de-servicios-aereos-del-altiplano/
https://www.reuters.com/article/us-mexico-helicopter-idUSKCN1ON179
https://edition.cnn.com/2018/12/24/americas/puebla-state-governor-martha-erika-alonso-dead/index.html
https://mexiconewsdaily.com/news/crash-probe-finds-no-issues-with-engines-controls/
https://www.ainonline.com/aviation-news/general-aviation/2020-12-28/mexico-aw109-crash-now-homicide-investigation
________________________________
Type aircraft: https://www.airliners.net/photo/Untitled/AgustaWestland-AW-109S-Grand/4738243?qsp=eJwtjLEKwkAQBf9lay1EsEgXsTeFgu2y%2B9Bg9I69hXiE/LvrYTfMwCwk6e34%2BKVmUEcFbPKgDWU2fhXqFnqizsk0mG799jqcopZkfqxhlB29CLJD//5sCvslFGmje4x3AbChMe0P4XUseeL2gPM40bp%2BAR3MLko%3D
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Dec-2018 02:59 | Geno | Added |
| 25-Dec-2018 03:22 | Geno | Updated [Source, Damage] |
| 25-Dec-2018 04:03 | Iceman 29 | Updated [Source, Embed code] |
| 25-Dec-2018 04:40 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Source, Embed code, Narrative] |
| 25-Dec-2018 07:37 | Isabella Barbiero | Updated [Nature] |
| 25-Dec-2018 09:52 | Aerossurance | Updated [Source] |
| 25-Dec-2018 12:23 | Aerossurance | Updated [Source, Narrative] |
| 25-Dec-2018 16:45 | Iceman 29 | Updated [Embed code] |
| 25-Dec-2018 16:51 | Iceman 29 | Updated [Embed code] |
| 27-Dec-2018 11:45 | Iceman 29 | Updated [Embed code, Narrative] |
| 04-Jan-2019 12:53 | Anon. | Updated [Embed code] |
| 09-Jun-2019 14:18 | Aerossurance | Updated [Nature, Source, Narrative] |
| 27-Mar-2020 20:43 | srod | Updated [Source, Narrative] |
| 27-Mar-2020 20:44 | harro | Updated [Embed code, Narrative, Accident report, ] |
| 29-Dec-2020 10:24 | Aerossurance | Updated [Source, Narrative, Accident report] |
| 29-Dec-2020 13:21 | Aerossurance | Updated [Narrative, Accident report] |
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