Aircraft components, units and assembly are operated of the following ways:
- Resource maintenance ;
- On-condition maintenance with reliability level control.
It is stipulated by aircraft maintenance regulations to carry out operational and
periodic forms of maintenance:
- Line maintenance check
- Scheduled maintenance check
- Maintenance in store
- Maintenance after emergency cases occurred during flight or on ground
Forms of maintenance
LINE MAINTENANCE
ОС Form (Parking)
When parking period is more than 2 hours
ВС Form (Meeting)
After each landing
ОВ Form (Flight)
Before each flight
Т Form
- Before each flight.
- Before each flight after scheduled inspection, by training flights
- when another fueling up is scheduled .
- Before flight after completed maintenance according to T, E, W
- Forms the parking period is from 12 hours to 5 days.
E Form
- In base/terminal airport when flight hours are not less than 5 hours from
the date of E or W Form fulfillment.
- After ground time more than 5 days, under condition that the
- Aircraft was not placed in a storage
- Before flight after special maintenance
- After aircraft check flight.
W Form
- once per 15+5 days. When at least one flight a day is
- carried out during period of time less than 30 days
- before flight after storage time
- before putting aircraft into operation after delivery from
- manufacturing plant
Periodic maintenance
А Form
|
Every 750 -50 flight hours
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C Form
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Every 36± 3 months
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D Form
|
Every 10± 0,5 years
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Maintenance in storage
In cases, when the time period between |
30 days
|
aircraft maintenance exceeded 15 days, every
|
90 days
|
|
180 days
|
Maintenance after emergency cases occurred
- Exceeding max. payload mass
|
|
|
|
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Maintenance manpower
| No |
Maintenance type
|
Interval Cycle / (flight hours)
|
Manpower (man/ hours)
|
Duration (hours)
|
Work description
|
Line maintenance
|
| 1 |
Transitional (TP)
|
1/2
|
0,44
|
0,33
|
Overall airframe, power plant, landing gear inspection.
Familiarization with integrated control system.
|
| 2 |
Days(D)
|
up to 48 hours/14 flight hours
|
1,11
|
0,5
|
Exterior airframe, power plant, landing gear inspection. Systems check by integrated control system.
|
| 3 |
Two weeks (TW)
|
up to 15 days/100 flight hours
|
5,85
|
1
|
Exterior airframe, power plant, landing gear inspection. Systems and equipment serviceability check, monitoring and refilling of power fluids.
|
Periodic maintenance
|
| 4 |
Form А (750 hours)
|
90 days/ 750 flight hours
|
100
|
20 |
Systems and equipment serviceability check, failure diagnosis. Separate sections, detail parts of airframe, power plant, landing gear internal inspection . Oiling works.
|
| 5 |
Form C
(7500 hours)
|
36 months/7500
|
2100
|
15 days
|
Airframe overhaul. Functional systems monitoring that require additional preparations.
|
| 6 |
Form D
(30000 hours)
|
120 months/30000 |
6600
|
30 days |
Airframe design diagnosis including design and systems partial removal and disassembly.
|
Maintainability
- Easy access to wing attachment fitting, tail units and primary structural member for visual and instrumental monitoring.
- Glider primary members, engine components, windmill units, landing gear and control system are adjusted for using nondestructive control technique.
- Anticorrosion protection of all design elements, using of lasting paint-and-lacquer coating and composites make the aircraft to be operated in every weather conditions.
- Standard instruments and ground support equipment are generally used by maintenance.
Maintenance support
Engineering support system ensures planned and operative trips of UAC’s support team to the aircraft allocation site for checking of aircraft operating condition. On the basis of information obtained according the corresponding design and maintenance engineering measures and recommendations are developed .
The central UAC’s warehouse and branches dispose enough value of spare parts, having limited life time or proved to be broken down during operation, and also quick wearing parts which could be delivered to the customer “on-call” basis.
UAC’s call center is available 24 hours / 7 days.
The orders execution is provided for:
The orders execution is provided for:
- on urgent orders within 4 hours
- on critical orders within 24 hours
- on general orders within 7 days.
Spare parts support
Spare parts delivery system includes central consignment storage and regional warehouses where aircrafts are operated. By agreement with the customer it is possible to establish storages facilities at aircraft home base, whereas regular inventory and storage renewal according to spare parts consumption would be provided.
Documentation & information support
- Notification about design modifications and improvements;
- Service bulletin;
- Periodic information bulletin;
- Repair documentation and other technical and maintenance documentation modifications
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