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Рік заснування видання - 2011


08.12.2022 01:12

[3. Technical sciences]

Author: Serhii Shahamidovich Shaabdiiev, Candidate of Technical Sciences, National Aerospace University named after M.E. Zhukovsky "Kharkiv Aviation Institute", Kharkiv

Turboprop regional passenger aircraft Antonov 140 (hereinafter referred to as the aircraft), designed by the Ukrainian state company "Antonov", meets the requirements of aviation regulations part 25 and has a type certificate TL0010 dated 25.04.2000, issued by the State Aviation Service of Ukraine [1].

Aircraft airworthiness support is carried out in accordance with the Maintenance Program set forth in the maintenance schedule of the Antonov 140 aircraft (hereinafter referred to as the schedule) during the service life of the aircraft.

The aircraft attractiveness can be increased if the schedule are improved and modified not only by the designer of the aircraft, but also by its operators.

The purpose of this research is to determine the compliance of the schedule with the recommendations of MSG-3 (Maintenance Steering Group) "Operator/Manufacturer Scheduled Maintenance Development".

The research analyzes the schedule and concludes about according to MSG-3 requirements.

The schedule includes four kinds of maintenance - operational, periodic, and special and storage [2]. Operational maintenance is carried out on the ramp and includes four types of work on the aircraft - meeting, parking, inspection and A1, A2 and B forms maintenance, and ensuring departure. Periodic maintenance is carried out in the hangar according to the aircraft technical condition and is assigned by flight hours, every 500 flight hours, and calendar time, every 6 months, until the end of the service life. Some components, such as accumulators, engines, auxiliary power unit, propellers, chassis wheels and fire equipment, are maintained at other intervals. Components are operated according to two methods - calendar time and technical condition until safe failure. The time the aircraft is in storage is taken into account when assigning the next periodic technical for the service life and is included in the service life of the aircraft. The time the aircraft is in storage is included in the service life of the aircraft.

Periodic maintenance works are carried out with a frequency of 500, 1000, 1500, 2500 and 5000 flight hours, and – 6, 12, 36 60 months. These works are multiples of the forms of periodic maintenance by flight hours and service life, respectively. After the completion of these intervals, the cycle of periodic maintenance of the aircraft is repeated again.

Operational maintenance includes: auxiliary works, maintenance works, maintenance of Auto flight АТА 022, Communication АТА 023, Electrical power АТА 024, Furnishings and rescue equipment АТА 025, Fire protection АТА 026, Flight controls АТА 027, Hydraulic power АТА 029, Ice and rain protection АТА 030, Indicating system АТА 031, Landing gear АТА 032, Lights АТА 033, Navigation АТА 034, Oxigen АТА 035, Water and waste АТА 038, Auxiliary power unit АТА 049, Fuselage АТА 053, Nacelles АТА 054, Stabilizers АТА 055, Wings АТА 057, Propellers АТА 061, Power plant АТА 071, ТВ3-117ВМА-СБМ1 Engine АТА 072, Engine fuel АТА 073, Bleed air АТА 075, Engine indicating АТА 077, starting АТА 080, Loading equipment АТА 132, Onboard controls and flight data recording АТА 142.

Periodic maintenance additionally includes follow systems: air condition АТА 021, Fuel АТА 028, Pneumatic АТА 036, Doors АТА 052, Windows АТА 056, Engine controls АТА 076.

The main idea behind this concept is to recognize the inherent reliability of aircraft systems and components, avoid unnecessary maintenance tasks and achieve increased efficiency [3]. The underlying principles are that:

• Maintenance only effective if task applicable

• No improvement in reliability by excessive maintenance

• Needless tasks can also introduce human error

• Few complex items exhibit wear out

• Monitoring generally more effective than hard-time overhaul - Condition-based maintenance (sometimes known as CBM)

• Reliability only improved by modification

• Maintenance may not be needed if failure cheaper

The schedule analysis showed excessive maintenance both in terms of the work volume (simultaneous work on flight hours and calendar time) and of the work frequency (every 500 flight hours and 6 months).

The maintenance interval of some components is different from the maintenance interval of the aircraft. Some components are not maintained according to technical condition.

These discrepancies do not reduce the reliability of the aircraft, but worsen the efficiency of operation.

Increasing the efficiency of aircraft operation is possible with the improvement of the schedule not only by the aircraft designer, but also by the aircraft operators on the basis of experience and operating conditions.


1. (external link)

2. Samolet An-140: Reglament tekhnicheskogo obsluzhivaniya. – V 2 kn. – Kiev: ANTK im. O. K. Antonova, 2002. – Kn. 2. – 184 s.

3. (external link)

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