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Title / Repair and/or overhaul helicopter rotor free-wheel units
Level / 4 / Credits / 4
Purpose / People credited with this unit standard are able to: prepare to repair and/or overhaul helicopter free-wheel units; locate defects; repair and/or overhaul free-wheel units; test and adjust free-wheel units; and complete finishing activities related to the repair and/or overhaul task.
Classification / Aeronautical Engineering > Helicopter Repair and Overhaul
Available grade / Achieved
Explanatory notes
1All tasks are to be carried out in accordance with enterprise procedures, the enterprise being the organisation carrying out the work. Enterprise procedures referred to in this unit standard are the applicable procedures found in the following:enterprise exposition;manufacturer publications;Government and local body legislation;airworthiness authority requirements.
2Repair and overhaul activities are those usually carried out in a specialist bay or workshop.
Outcomes and evidence requirements
Outcome 1
Prepare to repair and/or overhaul helicopter free-wheel units.
Evidence requirements
1.1Task is determined by reviewing documentation and enterprise procedures.
Rangeconfirm fault, repair, overhaul, modify.
1.2Free-wheel unit identification is confirmed with documentation.
1.3Work area is prepared, and resources obtained and checked for serviceability or status in accordance with enterprise procedures.
Rangepublications, materials, tools, equipment, safety equipment, environmental conditions established.
1.4Free-wheel unit is prepared for repair or overhaul in accordance with enterprise procedures.
Rangeclean, inspect, assess economics of carrying out repair or overhaul.
1.5Next task is determined and documented in accordance with enterprise procedures.
Rangelocate defects, repair or overhaul, test, adjust, complete the task.
Outcome 2
Locate defects.
Evidence requirements
2.1Defects are located using troubleshooting techniques and inspection procedures appropriate to the defect indications in accordance with enterprise procedures.
2.2Defects found during troubleshooting are reported and documented in accordance with enterprise procedures.
Outcome 3
Repair and/or overhaul free-wheel units.
Evidence requirements
3.1Free-wheel unit is disassembled in accordance with enterprise procedures.
Rangeclean, label, preserve, segregate.
3.2Defects found during disassembly are reported and recorded in accordance with enterprise procedures.
3.3Rectification action is determined and documented in accordance with enterprise procedures.
Rangerepair, overhaul, replace, modify, adjust, scrap; confirmation of action to be taken obtained from supervisor, action to be taken recorded.
3.4Replacement parts are procured and verified as authentic and serviceable in accordance with enterprise procedures.
Rangeidentify, inspect.
3.5Defects are rectified in accordance with enterprise procedures.
Rangerepair, replace, modify, adjust.
3.6Free-wheel unit is assembled in accordance with enterprise procedures.
3.7Inspections are obtained in accordance with enterprise procedures.
Rangeindependent, duplicate, progressive.
Outcome 4
Test and adjust free-wheel units.
Evidence requirements
4.1Free-wheel unit is prepared for testing in accordance with enterprise procedures.
4.2Free-wheel unit is tested and adjusted in accordance with enterprise procedures.
Rangetroubleshoot, functionally test, calibrate, adjust, document adjustments and performance.
4.3Inspections are obtained in accordance with enterprise procedures.
Rangeindependent, duplicate, progressive.
Outcome 5
Complete finishing activities related to the repair and/or overhaul task.
Evidence requirements
5.1Free-wheel unit is prepared for use, storage, or transit in accordance with enterprise procedures.
Rangelocking, inhibiting, blanking, packing.
5.2Completion activities specific to the task and work area are carried out in accordance with enterprise procedures.
Rangeactivities may include but are not limited to – tool control, cleanliness, tidiness, return of publications, preparation for next activity, return of helicopter and systems to normal.
5.3Resources are checked for serviceability and returned to service or storage in accordance with enterprise procedures.
Rangeequipment, safety equipment.
5.4Leftover parts and materials are disposed of in accordance with enterprise procedures.
Rangeserviceable, unserviceable, surplus, waste, scrap, hazardous.
5.5Documentation is completed in accordance with enterprise procedures.
Planned review date / 31 December 2018Status information and last date for assessment for superseded versions
Process / Version / Date / Last Date for AssessmentRegistration / 1 / 19 June 1995 / 31 December 2016
Revision / 2 / 7 August 1997 / 31 December 2016
Revision / 3 / 8 May 2001 / 31 December 2016
Review / 4 / 20 June 2006 / 31 December 2016
Review / 5 / 18 June 2014 / N/A
Consent and Moderation Requirements (CMR) reference / 0028
This CMR can be accessed at
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
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ServiceIQSSB Code 9068 / New Zealand Qualifications Authority 2018