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S3C9 - ENGINE GROUND RUNS
Table of Contents
1. Aircraft engine ground runs are carried out when the safe, full or partial correct operation of an aircraft or aeronautical product needs to be proven before being returned to service or cleared for maintenance test flight and are applicable to both fixed wing and rotary wing aircraft. Engine ground runs are performed with aircraft engines installed in the aircraft, a ground test stand or a test facility.
2. The term ‘engines’ includes Auxiliary Power Units (APUs) where they are operated to meet the requirements of paragraph 1. The requirements of this chapter do not apply where APUs are used in lieu of a ground power unit to supply supplemental power, eg environmental control systems air or electrical power, or as part of an operational servicing (flight servicing), or pre-flight check. However, the authorisation requirements for the APU ground runner apply at all times and the aircraft is not to be left unattended by the APU runner while the APU is running.
3. This chapter prescribes the Approved Maintenance Organisation (AMO) responsibilities and procedures to be followed when conducting engine ground runs.
Senior Maintenance Managers
4. The Senior Maintenance Manager (SMM) is responsible for ensuring:
5. The Ground Runner is responsible for:
Installed Aircraft Engines (Fixed Wing)
6. The following personnel may be authorised to ground run installed fixed wing aircraft engines:
Installed Aircraft Engines (Rotary Wing)
7. The following personnel may be authorised to ground run installed rotary wing aircraft engines:
Auxiliary Power Units
8. The following personnel may be authorised to ground run an APU:
Engines in Test Stands and Facilities (Fixed or Mobile)
9. The following personnel provided they are authorised, qualified and current on both engine type and the operation of the particular test stand or facility may run engines in test stands and facilities:
Authorisation of Ground Run Instructors
10. AMO ground run instructors must be authorised by the SMM and the authorisation recorded in their record of training and employment document. The entry should list the aircraft engine type authorised to instruct on and any limitations that apply.
Authorisation of Ground Runners
11. When personnel have satisfied all prerequisite requirements, an authorisation entry must be annotated within a record of training and employment document. The entry must state the type of aircraft engine that can be ground run and any limiting conditions that may apply.
Withdrawal of Authorisation
GROUND RUN CHECKLIST
13. Aircraft engines must be ground run in accordance with approved checklists. The System Program Office for an aircraft type is responsible for the issue and amendment of checklists and will ensure that such checklists clearly identify the engine operating procedures and limitations.
Fixed Wing Aircraft
14. Precautions to be observed prior to ground running fixed wing aircraft are as follows:
Helicopter Rotors Engaged
15. Precautions to be observed prior to aircrew ground running helicopters with rotors engaged are as follows:
GROUND RUN SUPERVISION
Ground Running of Installed Aircraft Engines
16. During the ground running of installed aircraft engines, the aircraft's designated captains seat or flight engineers station must be occupied at all times, by:
17. All documentation must be completed in accordance with Section 4 Chapter 2—Recording and Certification of Aircraft and Aeronautical Product Maintenance.
18. When a ground run is necessary for fixed wing or rotary wing, with or without rotors engaged, the following entry must be made in recording and certification system, ‘Ground run required for... (reason and Serial Number of Work (SNOW) in accordance with... (applicable servicing schedule and/or local instructions)’ in the unserviceability field.
Ground Run Authorisation
19. The SMM or delegate must independently check the aircraft documentation to ensure no outstanding maintenance will compromise the ground run and certify in the recording and certification system for the aircraft.
20. The certification must indicate that all applicable entries have been placed in the recording and certification system and the aircraft is capable of being ground run.
Ground Run Acceptance
21. After the SMM or delegate has certified the aircraft capable of being ground run, the ground runner must crosscheck the documentation and certify in the recording and certification system for the aircraft.
22. This certification indicates the ground runner has checked the documentation and accepts responsibility for the aircraft and the ground run.
Ground Run Completion
23. On completion of the ground run, the ground runner must enter in the corrective action field against the entry detailed in paragraph 18 ‘Ground run completed in accordance with...(applicable servicing schedule and/or local instructions)’ and certify with a signature and DTG in the recording and certification system. This certification closes the entry for the specific engine ground run and releases the aircraft back to general maintenance.
MAINTENANCE FOLLOWING AIRCRAFT ACCEPTANCE
24. Where the requirements exist, conduct of maintenance is permissible after the ground runner has accepted responsibility for the aircraft and the ground run provided that:
25. These procedures provide an avenue for maintenance to be conducted, without the requirement of further pre-engine run entries/authorisations, eg multiple ground runs, or release to general maintenance.
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