External hoist hook bumper is vulnerable to incorrect assembly - Civil Aviation Safety Alerts (CASA) No. 2019-06


Owners operators and maintainers of Bell model 429 and 430 helicopters with optional external hoist installed

File Classification No. : Z 5000-35
RDIMS No. : 15669420
Document No. : CASA 2019-06
Issue No. : 01
Effective Date: 2019-11-08


The purpose of this Civil Aviation Safety Alert (CASA) is to raise awareness of a hazard that may affect the external hoist hook “bumper” assembly and to recommend accomplishment of corrective actions to mitigate risk of failure.


Some Bell model 429 and 430 helicopters may be equipped with a Goodrich 600-pound capacity external hoist. The manufacturer of the hoist received a report of a hoist with a hook “bumper” incorrectly assembled. This condition, if not corrected, could result in loosening of the assembly with possible loss of the load on the hoist.

The hoist manufacturer has issued a Service Information Letter (SIL) to inform operators about the condition and provide instructions so that affected hoists can be inspected to verify that they are correctly assembled.

Recommended action:

Transport Canada recommends that owners, operators and maintainers of Bell model 429 and 430 helicopters that are equipped with the optional 600-pound capacity External Hoist kit, review Goodrich SIL-2018-03 Revision 1, dated 03 April 2018, and complete the actions contained in that document to make sure the hook “bumper” assembly is correctly assembled.

Contact office:

For more information concerning this issue, contact a Transport Canada Centre; or contact Ross McGowan, Continuing Airworthiness in Ottawa, by telephone at 1-888-663-3639, facsimile 613-996-9178 or by e-mail at cawwebfeedback@tc.gc.ca.

Original signed by

Rémy Knoerr
Chief, Continuing Airworthiness
National Aircraft Certification

The Transport Canada Civil Aviation Safety Alert (CASA) is used to convey important safety information and contains recommended action items. The CASA strives to assist the aviation industry's efforts to provide a service with the highest possible degree of safety. The information contained herein is often critical and must be conveyed to the appropriate office in a timely manner. The CASA may be changed or amended should new information become available.