Week 2: Pitot Static Systems Testing

Question 1

What happens if the altitude rate changes faster than the limit of the installed instrument?

Answer 1

Damaged

Question 2

Pitot pressure should be ________ static pressure

Answer 2

Greater than or equal to

Question 3

What should you never do to a VSI?

Answer 3

Never exceed the rate of change

Question 4

Once testing is all done to what condition must you return the aircraft?

Answer 4

Flying condition

Question 5

What does the pitot system leak test check?

Answer 5

Integrity of pitot probes, lines, instruments

Question 6

What type of pressure are you putting into the pitot probe?

Answer 6

Positive pressure

Question 7

Where would you find the allowable leak rate?

Answer 7

Maintenance Manual

Question 8

For the STATIC testing procedure, the allowable leak depends on what?

Answer 8

Pressurized or non pressurized

Question 9

For an unpressurized test, what are the 2 ways?

Answer 9

1. Put a static differential pressure of 1inHg

2. Alt. reading must be 1000ft above aircraft elevation at time of test

Question 10

For a pressurized test, at what altitude without pitot could damage the ASI and what should you do to fix it?

Answer 10

above 3500ft open crossbleed valve to equalize pressure

Question 11

If a leak test fails on an unpressurized aircraft, input a positive pressure till what?

Answer 11

A 500ft decrease on indication

Question 12

If you apply soap to a static port and its bubbling what do you have?

Answer 12

A leak (positive pressure)

Question 13

What does a Barometric Scale Error test?

Answer 13

The difference in altitude changes in barometric setting (kollsman) tested at a constant pressure

Question 14

In the barometric scale error, what is the tolerance for the recorded error?

Answer 14

Must be within 25ft

Question 15

How do you perform a Scale error test and what is it for?

Answer 15

Set to 29.92inHg and it tests the difference between the master altimeter and the aircraft altimeter

Question 16

What is the purpose of the Friction test?

Answer 16

Tests if the mechanism friction is excessive (tap the sides)

Question 17

This test checks to see if the altimeter moves the same way up and down (aneroid elasticity)

Answer 17

Hysterisis

Question 18

How do you perform a case leak?

Answer 18

Apply a vacuum pressure at 18000ft and hold for 1min

Question 19

This test checks to see if the altitude returns to where you, must not be recorded more than 5min after the hysterisis test and has a tolerance of 30ft

Answer 19

After Effect

Question 20

What does RVSM stand for?

Answer 20

Reduced Vertical Separation Minimums