曝光台 注意防骗
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. Engine and engine to main gearbox input drive shafts.
. Main gearbox shafts, gears and bearings.
. Accessory gears, shafts and bearings.
. Tail rotor drive shafts and hanger bearings.
. Intermediate and tail gearbox gears, shafts and bearings.
. Main and tail rotor track and balance.
Helicopter fit
The OGP recommended equipment fit for offshore helicopters detailed in Appendix 7 includes the availability of Vibration Health Monitoring (VHM) equipment and Engine Usage Monitoring Systems (UMS), if approved by the regulatory authority for the helicopter type.
Helicopters with 10 or More Seats: For helicopters type certificated for 10 seats or more it is recom-mended that a HUMS or, as minimum, VHM coupled with an engine UMS be fitted.
Helicopters with 9 or Less Seats: For helicopters type certificated for 9 seats or less it is recom-mended that a basic VHM of the drive line / turning components and an engine UMS be fitted.
Installation approval
Certification/approval of the fitment of HUMS/VHM by the local regulatory authority on a “no hazard/no credit” basis is acceptable.
Technical requirements
Operators of aircraft with vibration monitoring systems should establish a written list (MEL) of HUMS/VHM system components and identify those that are allowed to be inoperative and the time period, expressed in airframe hours.
In addition, where helicopters are operated in Performance Class 2, with exposure time during take-off and landing, or in Performance Class 3, it is recommended that the VHM should be augmented by a propulsion system Usage Monitoring System, where this is not already included in HUMS. Maintenance logs should provide details on inoperative vibration system components.
Daily assessments of HUMS/VHM and UMS downloads for warnings and trend analysis of the recorded data should be completed.
Inspection programmes should be written to require verification that vibration parameters are within tolerance at the beginning of a flying period, or appropriate maintenance actions are taken for excedances before flight.
References
A basic reference for HUMS is CAP 693 and FAA Advisory Circular AC 29-2C, Chg 1, Chap 3 AC 29 MG15, and for UMS is Appendix 1 to JAR Ops 3.517(a) - para (b) (5).
10.3.2 Life rafts
All life rafts should be equipped with an emergency radio/beacon.
All life rafts should be equipped with an approved offshore survival kit and be attached to the raft with a lanyard.
Exception: Single piloted helicopter survival kits may be located separately in the front cabin area to provide easy access by the pilot or front seat passenger.
Helicopters having a seat capacity for 10 or more passengers should have two life rafts; each should be certified for 50% overload to enable any one life raft to be used by all occupants.
Helicopters having a seat capacity for 9 or less passengers should have a minimum of one life raft certified to carry all occupants.
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飞机管理指导方针 Aircraft management guidelines(57)
