Maintenance Task: Removal/Installation of a battery

First we have to read the technical logbook or the task card to know which is the problem of the aircraft. This time we see how the pilot has reported a failure of the plane’s battery.

 We will go to the maintenance manual (AMM) of the airplane to know what we have to do and read:

REMOVAL / INSTALLATION
1-Locate the batteries of the airplane with the Ilustrated Parts Catalogue (IPC).
2-Take the safety precautions by disconnecting the circuit breakers of “Batttery” and “DC System” and marking with a card where we can read “DO NOT OPERATE”.
3-Remove the cover panel of the battery placement.
4-Cut the lockwire of the battery’s connector and disconnect the battery.
5-Remove the battery.

1-Install a new or overhauled battery.
2-Connect the battery and lockwire the connector with a 0,021’ diameter of copper wire.
3-Install the cover panel.
4-Connect the “Battery” and “DC System” circuit breakers and remove the cards.
5-Test the DC System and the battery indications.

Air Florida flight 90 - Boeing 737

Causes of the accident

The biggest snowfall the pilots had seen. A non-recommended proportion of de-icing mix used on airplane. The layer of snow that accumulated on the wings after use the reverses to leave the parking. Have the system of anti-ice of the engines off and that freeze the inlet of the engine pressure sensor and caused a false reading of power in cockpit. But overall the unconsciousness of the captain to commit all these errors like not doing another de-icing knowing they had got snow on their wings and unfollowing the procedures.

Heroes of the accident

The police helicopter team of the city of Washington DC for the rescue of the survivors in the iced river. And Lenny who jumped into the iced river to rescue Priscilla Tirado to die frozen.

Crashes caused by maintenance errors

The flight of a McDonell-Douglas of Alaska Airlines in January of 2000 finished into the sea with 0 survivors. A bad maintenance for the Alaska Airlines engineers on the screwjack of the horizontal stabilizer caused the imposibility of control the aircraft. Another flight of Air Canada in June of 1982 landed emergency in Cincinnati after a fire into the cabin caused for a bad union and maintenance of the electric cables, died 23 people. 

DEICING PROCESS

ALASKA AIRLINES SCREWJACK

Why am I studying this?

I am studying aeromechanical maintenance because after 2 years of trying a university career in the UIB, I saw that this was not done for me. I looked for the offer of professional training that exists in the Balearic Islands and the only profession in which I really saw myself working and I liked it was this aircraft mechanic.

THE FIRST GIANT OF THE AIR. BOEING 747

The Boeing 747 is the icon of the world aviation, with its 4 engines and its second floor make it recognized wherever you go.

Nicknamed "Jumbo", in 1970 it was the first wide-body aircraft built in the world, that is, it was the first double-aisle airplane. 

It has a maximum capacity of about 600 people. The cargo version was able to load about 180,000 kg. And a modified version was able to transport the space shuttle over the fuselage.

The Jumbo gets its power from 4 turbofan engines Pratt & Whitney with high bypass ratio. Once again a pioneer in his time. It also had the largest comfort and entertainment system on board with 170 miles of cable inside its walls.