Preperation for NAC

NAC- Nepal Airlines Corporation is a national flag carrier of Nepal. It has an opening in 7th level for the post of aero/mech engineer. There are 4 sections in the syllabus:
1. Fundamentals
2. Mechanical
3. Management
4. Aero

So these are the topics we need to research on.

Study plan:

The 1st thing to consider while studying for NAC is that the questions are all objective. So there will be 4 options and u need to tick the right one. As with my belief all the questions will be not so difficult but confusing. So to cope with this, i believe wikipedia is the major source of knowledge. I will be using internet based resources to study the syllabus.

QN paper. There will be 50 qns with each carrying 2 marks. There will be no negetive marking. The total time given is 1.5 hrs.

Exam time: The exam routine is not out yet, however it is somewhere around march, on the basis of recent exams. So 3mnths tops.

Comments

ATA numbering system

An aircarft has a lot of parts, manufacturing them is one thing maintaining them is some other level challange. Thus to describe what needs to be done for what part requires a lot of documentation. The easy way engineers have come up is to name each section of the aircraft as different title numbers. ATA- Air Traffic association. It was created by people in ATA so called ATA chapters. with 100 chapters ATA So when some one says ATA chapter 72 it will always mean engine. ATA 27 flight controls ATA 32 landing gear ATA 72 is engine and so on If we go even deeper. ATA 72-00-01 is fan module ATA 72-00-02 is core module ATA 72-00-03 is HPT Module ATA 72-00-04 is LPT module ATA 72-00-05 is AGB module and so on

PT6A-27

General Engine specification Blog1. It is a turboprop engine- free turbine . This is an engine used in airplanes like DHC-6 Twin Otter 300 Harbin Y-12 Beechcraft This a Pratt and Whitney Canada Engine. One of the most famous and successful company to produce turboprop engine. Compressor It consist of 3 stage axial compressor and 1 stage centrifugal flow compressor. Combustion Annular reverse flow (right to left according to diagram above) combustion with 14 simplex burner (Glow plugs) Turbine 1 stage free power turbine and 1 sage gas generator power turbine.(Left to right according to diagram above) Other specs: Fuel type: aviation kerosine Overall pressure ratio- 6.3:1 Air mass flow: 5.3 lb/s Power to weight ration: 2.14 hp/lb

ACARS (Aircraft Communications Addressing and Reporting System)

ACARS This is a neat way used to bypass the intentional or unintentional human error on reporting flight information during or after flight . Before 1978 AD, this information was given via, voice logs, where captain verbally records the phase of flight and time. This brought human error in the data reporting and was extra work to the pilots. What ACARS does is acts as a reporting machine which reports flight information in different phases of flight to the Ground team. Initially ARINC developed this method for just 4 messages per flight, but now it has turned into a robust means of data link between not just aircraft and ground station but also between aircraft. ACARS (Aircraft Communications Addressing and Reporting System) is a data communications system used for air-ground communication between an aircraft and their own operations centers, air traffic control, and national aviation authorities. ACARS can be used anywhere in the world by connecting to a global ne...

aerobysam

Search This Blog