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drwer2
Yahoo User
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 Posted: Mon Jul 21, 2008 5:29 pm Post subject: What are " Phase inspections"? |
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| For civilian pistion aircraft, I know about the Annual Inspection. Ive noticed in some literature for Jet aircraft and some pressurized/turbo AC the requirement for "Phase Inspections" (sometimes A-G) Im pretty sure this relates to the number of cycles (landing gear) or landings or maybe the number of flights. Does anyone know the exact meaning of "phase inspections" as they relate to say....small twin-jets like the Citation or Hawker 400?thanksSo, if an aircraft is taken out of service (say mothballed), and the Phase inspections lapse, All you need to get back into service is to revisit the airframe/engine log books and re-do all the inspections?With some additional study....it appears that a jet aircraft is, more or less, an inexpensive life support system for a pair of very expensive and hungry engines. some estimates so far are upwards to 1MM$ per engine + 25- 50k$ for the inspections, not including repairs if needed. Am I in the ball park? |
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deepseteyes
Yahoo User
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| Posted: Mon Jul 21, 2008 6:27 pm Post subject: |
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| Since I am no Gen Av guy i can only relate to you on narrow & wide body aircraft. Phase Inspections -are scheduled inspections intervals set forth as a guide by aircraft manufacturer to check the airworthiness of the aircraft in their usage. Example A320"A" Check - Every 600 FH (flying.hours) or 750 FC (Flight cycles) or 100 Days whichever comes first."C" Check - Every 6000 FH or 4500 FC or 20 months interval"D" Check - Every 6 yearsHope I'd helped you in a way. |
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RGTIII
Yahoo User
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| Posted: Tue Jul 22, 2008 11:08 am Post subject: |
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| SInce you already know what an annual is on a GA aircraft, that is what the phase inspection is set out to be, but divided into phases.So, the major check is usuall called a "C" check. In order to complete an annual type inspection, there are a phase of several C checks that when put all together, equal the annual inspection. So:Generally with the older aircraft they would sort the aircraft into sections and perform inspections on them. So, for a say 5 phase inspection program, the C1 check might be all of the exterior and the wheel wells. The C2 might then encompass the wings and tail, then the C3 might be the interior and the crown sction, etc. Each of the inspections might have an interval of 15 months or so.That's essentially how the phased inspections work on transport category aircraft. I'm not a corporate jet guy, but I would assume that the philosophy would be the same, just the scope and nomenclature would change.As for pulling them out of the desert, you have to look at the maintenance program and know when each maintenance task was last done, and if it is hour, cycle, or calendar driven. If the aircrafti in an accepted storage program, the hourly and cycle driven tasks would suspend, but the calendar items would keep marching on time-wise.When you pull the aircraft you'd have to bring the maintenance program up to spec before being allowed to operate it. My company does that sort of thing for various clients since this is an intesive and laborious task. |
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