AM Aircraft Maintenance Inspection & Troubleshooting 3

Question 1

A pitot-static system leak check is performed and the altimeter does not hold its reading. Which regulation governs the required accuracy and test interval for this system on an IFR aircraft?

Accepted Answer

14 CFR 91.411 and 91.413

Answer

14 CFR 91.411 mandates an altimeter and pitot-static system check every 24 calendar months for IFR flight.

Question 2

During a borescope inspection of a reciprocating engine cylinder, you observe a gray, sooty deposit on the piston crown. This is MOST indicative of:

Accepted Answer

Normal combustion byproducts from a slightly rich mixture

Answer

Light gray sooty deposits on a piston crown are typical of rich mixture combustion and are generally within acceptable limits.

Question 3

An aircraft's magnetic compass consistently reads 5° east of actual heading on all headings. This error is MOST likely caused by:

Accepted Answer

A nearby electrical component inducing a fixed deviation

Answer

A consistent deviation in one direction on all headings typically indicates a nearby magnetic field, such as an electrical component, inducing a fixed error.

Question 4

When torquing a spark plug into an aircraft engine cylinder, the correct procedure after reaching the specified torque is to:

Accepted Answer

Verify the gap and install the lead, then verify proper firing during runup

Answer

After torquing, the ignition lead is installed and proper plug firing is confirmed during the engine runup magneto check.

Question 5

A hydraulic system pressure gauge fluctuates rapidly during gear retraction. The MOST probable cause is:

Accepted Answer

Air trapped in the hydraulic system

Answer

Rapid pressure gauge fluctuation during actuation is the classic symptom of air trapped in the hydraulic system, causing inconsistent pressure.

(AM) Aircraft Maintenance Certification Practice Test

(AM) Aircraft Maintenance Certification Practice Test

AM Aircraft Maintenance Inspection & Troubleshooting 3