TASK 71-00-00-700-050-B00 Engine Safety Precautions, Testing-000

DMC:V2500-A5-71-00-0000-00C-012A-B|Issue No:001.00|Issue Date:2014-05-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

V2500-A5

Common Information

TASK 71-00-00-700-050-B00 Engine Safety Precautions, Testing-000

Engine Safety Precautions

The properties of operation of jet engines make it necessary to prevent:

Injury to the person who operates the engine.

Damage to the engine.

Engine Safety Precautions for the Persons who Operate the Engine

Engine noise

Ear protection must be worn by all persons who work near the engine while the engine operates.

The air intake. Refer to Figure.

Stay away from the danger areas at the front and the sides of the engine during operation.

The exhaust

Keep away from the exhaust area when the engine is started and while the engine operates. The jet wake diagrams show danger areas. Refer to Figure and Figure.

All persons must keep away from the exhaust when the engine is started. Refer to Figure and Figure.

Remove all flammable material from the area. Refer to Figure and Figure.

The engine ignition system high voltage

Hot engine parts

After engine operation, do not work or make an inspection on the hot section or the exhaust areas for one half hour (preferably longer).

The compressor bleed valve discharge

Fuel and oil

Pressurized oil system

The oil tank is pressurized during operation. The pressure slowly decreases after shutdown. Do not remove the oil tank cap for a minimum of five minutes after engine shutdown.

Precautions and Procedures for Safe and Correct Engine Operation

The air intake

Clean the area in front of the air intake before the engine is operated.

The exhaust

The jet wake diagrams are for reference. Refer to Figure and Figure.

The jet wake diagrams are at standard sea level static conditions.

X-rays

Thrust lever movement

When possible, all thrust lever movements must be slow and smooth.

Snap accelerations and decelerations will not cause a deterioration of the engine performance if you obey the instructions which follow:

Before a snap acceleration, operate the engine at APPROACH IDLE for a minimum of five minutes after the first engine start.

After a fast deceleration, operate the engine at APPROACH IDLE for a minimum of five minutes before an engine shutdown.

If the engine has operated at high power (higher than 1.33 EPR) for more than 30 seconds (which includes usual acceleration time), and then operated at APPROACH IDLE for more than one minute, the engine must be operated at APPROACH IDLE for a minimum of 10 minutes before you make a snap acceleration.

Tailpipe fires during engine start

If a tailpipe fire occurs during engine start, shutoff the fuel and motor the engine to blow out the fire and decrease the internal engine temperature.

Dry chemical fire extinguishing agents

Dry chemical fire extinguishing agents are not recommended, but if these agents are used, special precautions are necessary to prevent corrosion to the engine parts. Refer to TASK 71-00-00-700-060-B00 (TESTING-000, CONFIG-001).

Water is not recommended to remove dry chemical fire extinguishing agents. These agents are not water-soluble. Water can cause the agents to build-up and bond to the parts, which can increase the possibility of corrosion.

NOTE

The jet wake diagrams are at standard sea level static conditions.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

WARNING

LOUD NOISE FROM THE ENGINE CAN CAUSE TEMPORARY OR PERMANENT DAMAGE TO THE EARS.

WARNING

THE ENGINE CAN MAKE ENOUGH SUCTION AT THE INLET DUCT TO PULL A PERSON UP TO, OR INTO (IN PART OR FULLY) THE DUCT. THIS CAN CAUSE A VERY BAD INJURY OR KILL A PERSON.

WARNING

THE EXHAUST GASES HAVE A BAD SMELL AND CAN BE BAD TO BREATHE. THE GAS IS BAD FOR THE EYES. DO NOT BREATHE THE GAS OR LET THE GAS GET IN YOUR EYES (IN AREAS WHERE THERE IS A HIGH CONCENTRATION).

WARNING

THE EXHAUST GAS IS HOT WHEN THE ENGINE OPERATES AT IDLE. DO NOT GO IN THE PATH OF THE EXHAUST. THE SKIN CAN GET BURNED.

WARNING

AT SOME TIME, WHEN THE ENGINE IS STARTED, FUEL WHICH HAS NOT BEEN BURNED IN THE COMBUSTION CHAMBER CAN IGNITE IN THE EXHAUST AREA. THIS CAN CAUSE LONG FLAMES TO BLOW OUT OF THE EXHAUST NOZZLE.

WARNING

DO NOT TOUCH ANY PART OF THE ENGINE IGNITION WHILE THE ENGINE OPERATES.

WARNING

THE ENGINE IGNITION SYSTEM USES HIGH ENERGY WHICH IS DANGEROUS AND CAN MAKE ELECTRIC SHOCKS WHICH CAN CAUSE A BAD INJURY OR KILL A PERSON.

WARNING

DO NOT TOUCH THE HOT AREAS OF THE ENGINE AFTER ENGINE OPERATION. YOU CAN GET BURNED IF YOU DO NOT OBEY THESE INSTRUCTIONS.

WARNING

STAY AWAY FROM THE BLEED VALVE DURING THE VALVE-OPEN OPERATION WHILE THE ENGINE IS IN OPERATION. WHEN THE BLEED VALVE OPENS, HIGH PRESSURE AIR AT A HIGH VELOCITY COMES OUT. THIS AIR CAN MOVE A PERSON FROM HIS FEET AND CAUSE INJURY.

WARNING

FUELS AND OILS CAN CAUSE THE SKIN TO DRY OUT. IF POSSIBLE DO NOT LET FUELS AND OILS TOUCH THE SKIN.

WARNING

HOT OIL CAN SPRAY ON A PERSON AND CAN CAUSE BURNS.

CAUTION

BEFORE THE ENGINE IS OPERATED, DO A CHECK OF THE AIR INTAKE AND THE AREA NEAR IT. EXAMINE FOR LOOSE OBJECTS WHICH COULD BE PULLED IN TO THE ENGINE.

CAUTION

THE ELECTRONIC ENGINE CONTROL (EEC) CAN BE DAMAGED BY CONTINUED USE OF X-RAYS. THE EEC MUST BE REMOVED BEFORE THE USE OF X-RAYS.

CAUTION

A DETERIORATION OF THE PERFORMANCE CAN RESULT IF YOU DO NOT OBEY THE INSTRUCTIONS THAT FOLLOW.

CAUTION

USES OF DRY CHEMICAL FIRE EXTINGUISHING AGENTS CAN CAUSE CORROSION OF THE ENGINE PARTS.

CAUTION

WATER USED TO REMOVE DRY CHEMICAL FIRE EXTINGUISHING AGENTS CAN INCREASE THE POSSIBILITY OF CORROSION.

Procedure

    2. Figure: Air intake (ground idle)

    Air intake (ground idle)

    Figure: Jet wake velocity contour air intake (maximum takeoff thrust)

    Jet wake velocity contour air intake (maximum takeoff thrust)

    Figure: Jet wake velocity contour (ground idle thrust)

    Jet wake velocity contour (ground idle thrust)

    Figure: Jet wake velocity contour (maximum takeoff thrust)

    Jet wake velocity contour (maximum takeoff thrust)

    Figure: Jet wake temperature contour (maximum takeoff thrust)

    Jet wake temperature contour (maximum takeoff thrust)

Requirements After Job Completion

Follow-On Conditions

NONE