Wednesday, November 15, 2017

Student Visit HS 125 ATA 30 Ice and Rain

Today we have another day of student's visit. Although it is a dead aircraft, with many parts missing, it still help the the students to virtualize the aircraft systems and the operation.

1. ATA 30 - anti-ice
a. Ice detector - rotary type. Brief students how it work.
- Control switched and indication in the cockpit
The serrate piece turn freely when no ice



b. Deicer system  with deicing panel in the wing leading edge.

Perforated wing leading edge allows the chemical to seep put and blown to the top of the wing to remove ice.

wing with perforated leading edge



Wing and Tail Anti Ice Switch - On/OFF for continuous operation. Timer provided for a selected timer operation

c. Wing illumination light.  

Sunday, November 12, 2017

My Aircraft Visit HS125 ATA 30 Pitot and Windshield

Last week I went to visit the aircraft, to prepare for the students visit.

I am sharing some of the pictures.. I was doing the ATA 30 Ice and Rain Protection.

The visit was to let the students see the systems in an aircraft.

Ice and rain protection includes the following topics...
- ice detector
- wing anti- ice
- windshield anti ice.
- pitot static anti ice.

A. Ice Detector
I use to work on Boeing Aircraft. There was no ice detector. HS 125 has it. It is using a rotary type. Here is the picture of the detector.

ice detector - rotary type
The serrated piece rotates freely if no icing. When icing, the force to rotate increases, and a s/w is actuated.

Switches to turn On /OFF the wind Screen Anti Ice.

Tuesday, July 4, 2017

Module 13

Next semester, I will be teaching part of module 13, for the following topics...
- Hydraulic , Landing Gear and Flight Control.
- Pneumatic , Aircondition and Vacuum system.
- Engine - Starting and Ignition
- Fuel and Fire Protection.

The  syllabus for EASA are as follows...

13.7 Flight Controls (ATA 27)
(a) Primary controls: aileron, elevator, rudder, spoiler;
Trim control;
Active load control;
High lift devices;
Lift dump, speed brakes;
System operation: manual, hydraulic, pneumatic;
Artificial feel, Yaw damper, Mach trim, rudder limiter, gust locks.
Stall protection systems.
-
-
2
(b) System operation: electrical, fly by wire.
-
-
3

13.11 Air Conditioning and Cabin Pressurisation (ATA 21)
13.11.1 Air Supply
-
-
2
Source of air supply including engine bleed, APU and ground chart
13.11.2 Air Conditioning
Air Conditioning Systems;
-
-
2
Air cycle and vapour cycle machines;
-
-
3
Distribution systems;
-
-
1
Flow, temperature and humidity control system;
-
-
3
13.11.3 Pressurisation
Pressurisation systems;
-
-
3
Control and indicating including control and valves;
Cabin pressure controllers;
13.11.4 Safety and warning devices
Protection and warning devices.
-
-
3


13.12 Fire Protection (ATA2 6)
(a) Fire and smoke detection and warning systems;
-
-
3
Fire extinguishing systems; System tests.
(b) Portable fire extinguisher

-
-
1


13.13 Fuel Systems (ATA 28)
System layout;
-
-
1
Fuel tanks;
-
-
1
Supply systems;
-
-
1
Dumping, venting and draining;
-
-
1
Cross-feed and transfer;
-
-
2
Indications and warnings;
-
-
3
Refuelling and defueling;
-
-
2
Longitudinal balance fuel systems;





-
-
3
13.14 Hydraulic Power (ATA 29)
System lay-out
-
-
1
Hydraulic fluids;
-
-
1
Hydraulics reservoirs and accumulators;
-
-
1
Pressure generation, electrical, mechanical, pneumatic;
-
-
3
Emergency pressure generation;
-
-
3
Filters;
-
-
1
Pressure control;
-
-
3
Power distribution;
-
-
1
Indication and warning systems;
-
-
3
Interface with other systems;
-
-
3


13.15 Ice and Rain Protection (ATA 30)
Ice formation, classification and detection;
-
-
2
Anti-icing systems: electrical, hot air and chemical;
-
-
2
De-icing systems: electrical, hot air, pneumatic, chemical;
-
-
3
Rain repellent;
-
-
1
Probe and drain heating;
-
-
3
Wiper systems;
-
-
1


13.16 Landing Gear (ATA 32)
Construction, shock absorbing;
-
-
1
Extension and retraction systems: normal and emergency
-
-
3
Indications and warnings;
-
-
3
Wheel, brakes, antiskid and autobraking;
-
-
3
Tyres
-
-
1
Steering
Air ground sensing
-
-
-
-
3
3






13.18 Pneumatic/Vacuum (ATA 36)
System lay-out
-
-
2
Sources; engine/APU, compressors, reservoir, ground supply
-
-
2
Pressure control;
-
-
3
Distribution;
-
-
1
Indicators and warnings;
-
-
3
Interfaces with other systems;
-
-
3


13.19 Water / Waste (ATA 38)
-
-
2
Water system lay-out, supply, distribution, servicing and draining;
Toilet system lay-out, flushing and servicing


14.1 Turbine Engines
(a) Constructional arrangement and operation of turbojet, turbofan, turboshaft and turbopropeller engines;
-
-
1
(b) Electronic Engine control and fuel metering systems (FADEC).
-
-
2

14.2 Engine Indicating Systems
-
-
2  UNDER TURBINE ENG/ INDICATION
AJB 30503
Exhaust gas temperature/Interstage turbine temperature systems;
Engine speed;
Engine Thrust Indication: Engine Pressure Ratio, engine turbine discharge pressure or jet pipe pressure systems;
Oil pressure and temperature;
Fuel pressure, temperature and flow;
Manifold pressure;
Engine torque;
Propeller speed.



14.3 Starting and Ignition Systems
-
-
2
Operation of engine start systems and components;
Ignition systems and components;
Maintenance safety requirements



Thursday, April 20, 2017

Reading The Wiring Manual

I am grateful to http://www.aircraftmech.com/ for writing a good practical guide to read the wiring diagram.

I include the snap shot of the web page to help readers to make an easy reference.

http://www.aircraftmech.com/

Tuesday, April 11, 2017

Maint Work/ Replace wire

Here I insert reference for maintenance work.

The task selected is replacing wire on an engine...


Please refer to the quoted web page for more details...

The link is.... http://www.aircraftmech.com/

Monday, February 13, 2017

Structure Monitoring

The DCAM syllabus as in the AN1101 includes the topic on Structure monitoring (damage tolerance monitoring) under ATA 45, in the following modules:

1. Module 11A - Fixed Wing/ Turbine    Level 2
2. Module 12 - Rotary Wing  . Level 2
3. Module 13 - Avionics  -  Level 3


One of the issues involved are the reference documents, as the subject is relatively new, thus reference books are not readily available.

I had divided the topic of structuring monitoring into three (3) sub topics:
- Structural Health Monitoring
- Aircraft Integrated Maintenance System
- Health and Usage Monitoring

A quick google search reveals some results:

A. Structural Health Monitoring
a. Wikipedia - https://en.wikipedia.org/wiki/Structural_health_monitoring 
b. Structural health monitoring - ‎Balageas - Cited by 40
c. Powerpoint on Life Management of Aircraft


Note:
1. B777 - no mention of structural maintenance in the MM ATA45.