BoA B733 at La Paz on Aug 3rd 2019, main wheels rotate in relation to gear strut
Last Update: December 10, 2021 / 15:39:52 GMT/Zulu time
Incident Facts
Date of incident
Aug 3, 2019
Classification
Accident
Airline
BoA Boliviana de Aviacion
Flight number
OB-604
Departure
Cochabamba, Bolivia
Destination
La Paz, Bolivia
Aircraft Registration
CP-3077
Aircraft Type
Boeing 737-300
ICAO Type Designator
B733
Passengers reported a number of ceiling panels came down during the landing roll out.
The airline reported the aircraft stopped on the runway due to probelms with the landing gear.
Bolivia's DGAC reported the aircraft, a Boeing 737-300 registration CP-3077 performing flight OB-604, suffered a malfunction in the main gear and became disabled on the runway, the runway needed to be closed for about 2.5 hours. Bolivia's Accident Investigation Unit have opened an investigation and will contact the aircraft manufacturer.
Late Oct 8th 2019 Bolivia's DGAC announced, that all operations of Boeing 737 Classic Aircraft at La Paz El Alto International Airport are temporarily suspended starting Oct 10th for as long as techncial evaluations with respect to Operations and Air Worthiness are being carried until risk mitigations and acceptable level of safety is re-established. A series of events prompted the assessment and suspension (editorial note: see also Incident: BoA B733 at La Paz on Mar 7th 2019, fracture of left shimmy damper on landing, Accident: Peruvian B735 at La Paz on Nov 22nd 2018, both main gear struts collapse on landing and Incident: BoA B733 at La Paz on Nov 1st 2017, gear fracture).
In a Spanish progress report Bolivia's DGAC reported the investigation is still ongoing, analysis of the facts with specialists and the compilation of the final report as well as safety recommendations are under way.
The DGAC reported that a visual inspection confirmed both shimmy dampers on both main gear struts were broken and the wheels were damaged.
The captain (53, ATPL, 9,012 total hours) also held a flight instructors (B737) license and was assisted by the first officer (23, CPL, 893 hours total).
The FDR was examined by the NTSB and was found to be consistent with shimmy damper failures, which typically is caused one of the three factors: maintenance, high speed landing or a low rate of descent on touch down. Maintenance can not be determined to be a contributing factor, it is likely that the landing speed was increased due to tailwind at the time of touch down. It is also likely that one gear strut touched down before the other causing torsional moments which exceeded the other gear's shimmy damper's limits.
Incident Facts
Date of incident
Aug 3, 2019
Classification
Accident
Airline
BoA Boliviana de Aviacion
Flight number
OB-604
Departure
Cochabamba, Bolivia
Destination
La Paz, Bolivia
Aircraft Registration
CP-3077
Aircraft Type
Boeing 737-300
ICAO Type Designator
B733
This article is published under license from Avherald.com. © of text by Avherald.com.
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