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ASN Wikibase Occurrence # 146194
Last updated: 16 December 2020
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Time:17:23 LT
Type:Silhouette image of generic S58T model; specific model in this crash may look slightly different
Sikorsky S-58ET
Owner/operator:Helicópteros del Cusco (HeliCusco)
Registration: OB-1840-P
C/n / msn: 581672
Fatalities:Fatalities: 14 / Occupants: 14
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Hualla Hualla -   Peru
Phase: En route
Nature:Passenger - Non-Scheduled/charter/Air Taxi
Departure airport:Mazuco (17:21 LT)
Destination airport:Cusco
Investigating agency: CIAA Peru
A helicopter carrying 11 foreign nationals on a recce for a potential hydro electric project went missing on 6 June.
Police searchers on Saturday 9 June found the helicopter crashed into mountain at an altitude of 16,000ft. There were no survivors.

Probable Cause:
CFIT (Controlled Flight Into Terrain) caused by poor flight planning and poor management of operational risk of the pilot and the company operating the helicopter in bad weather in the last minutes of daylight flight , exceeding the operational limits set by the manufacturer and the FAA.

Contributory Factors:
The decision of the technical crew return to Cusco despite the late hour and projections of bad weather in the area, contrary to the current certification of the helicopter.
The bad weather conditions in the Mazuco-Cusco route, presenting a front of low clouds with temperatures and icy winds on the mountain chain both en route to Paucartambo, and the path to Urcos.
Failure to implement corrective action or suspend the company, on the part of the Directorate General of Civil Aviation, allowing operations to continue, despite the conditions pn acceptable safety levels of according to Note No. 179-2012-MTC / 12.04, the Report No. 160-2012- MTC / 12.07.EEF as stipulated in Articles No. 195 and 196 of the Rules of Civil Aeronautics Act No. 27261.

Several recommendations are made.


Accident investigation:
Investigating agency: CIAA Peru
Status: Investigation completed
Download report: Final report

Revision history:

07-Jun-2012 13:49 Tommy Maurer Added
07-Jun-2012 13:54 harro Updated [Aircraft type, Narrative]
07-Jun-2012 17:26 Black Typhoon Updated [Registration, Cn, Operator, Source]
08-Jun-2012 00:41 TB Updated [Date, Time, Other fatalities, Location]
10-Jun-2012 00:45 gerard57 Updated [Source, Damage, Narrative]
10-Jun-2012 11:46 TB Updated [Source]
11-Jun-2012 11:08 aegir Updated [Source, Embed code]
18-Jul-2012 09:41 TB Updated [Departure airport, Source, Embed code, Narrative]
30-Aug-2014 14:12 Aerossurance Updated [Source, Narrative]
31-Aug-2014 18:03 Aerossurance Updated [Source, Narrative]
31-Aug-2014 18:24 Aerossurance Updated [Narrative]
19-Jan-2015 17:05 Aerossurance Updated [Nature, Source]
20-Jan-2015 23:07 Aerossurance Updated [Time, Source, Narrative]
19-Jul-2020 18:55 harro Updated [Source, Narrative, Accident report, ]

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