AAC Maintenance Procedures & Standards — Questions and Answers

Question 1: A crew chief finds a fault that makes the aircraft unsafe to fly. Which status symbol goes on the aircraft forms?

Red diagonal (/)
Red X (Correct answer)
Red horizontal dash (-)
Circled red X

Correct answer: Red X

Under TAMMS-A (DA PAM 738-751), a Red X means the aircraft is unsafe and must not be flown until the fault is fixed.

Question 2: What does a red diagonal (/) status symbol on DA Form 2408-13-1 mean?

The aircraft is grounded until a test flight
An inspection is overdue
A deficiency exists, but it does not make the aircraft unsafe (Correct answer)
The entry was made by mistake

Correct answer: A deficiency exists, but it does not make the aircraft unsafe

A red diagonal marks a known deficiency that does not make the aircraft unsafe to fly.

Question 3: What does a circled red X allow?

The aircraft may fly under specific limits approved by an authorized commander or designated representative (Correct answer)
Any crew chief may clear the fault after a run-up
The aircraft may fly with no restrictions for 10 hours
The fault was found during a phase inspection

Correct answer: The aircraft may fly under specific limits approved by an authorized commander or designated representative

A circled red X lets an aircraft with a Red X condition fly under stated limits, but only with authorization from the commander or designated representative.

Question 4: Which form records the aircraft's current status, faults, and the maintenance done to correct them?

DA Form 2408-12
DA Form 2408-15
DA Form 2408-16
DA Form 2408-13-1 (Correct answer)

Correct answer: DA Form 2408-13-1

DA Form 2408-13-1 (Aircraft Inspection and Maintenance Record) records status symbols, faults, and the corrective actions taken.

Question 5: A fault cannot be fixed right away and maintenance is deferred. Where is it carried forward?

DA Form 2408-14-1, Uncorrected Fault Record (Correct answer)
DA Form 2408-18, Equipment Inspection List
DD Form 1574
DA Form 2408-12

Correct answer: DA Form 2408-14-1, Uncorrected Fault Record

Deferred faults are copied to DA Form 2408-14-1 so they stay visible until corrected.

Question 6: Which publication sets the Army's overall maintenance policy, including the two-level maintenance system?

AR 95-1
AR 750-1 (Correct answer)
TM 1-1500-204-23
DA PAM 738-751

Correct answer: AR 750-1

AR 750-1 (Army Materiel Maintenance Policy) sets the field and sustainment maintenance structure.

Question 7: Under the Army's two-level maintenance system, what are the two levels?

Unit and depot
AVUM and AVIM
Field and sustainment (Correct answer)
Operator and contractor

Correct answer: Field and sustainment

AR 750-1 groups maintenance into field (on-system) and sustainment (off-system/depot) levels.

Question 8: A technician finds a tool missing from the kit after working in an engine compartment. What should happen first?

Write it on a lost-tool report next week
Finish the work package and search later
Order a replacement and continue
Stop work, start a search, and do not release the aircraft until the tool is found or the loss is resolved per local tool control SOP (Correct answer)

Correct answer: Stop work, start a search, and do not release the aircraft until the tool is found or the loss is resolved per local tool control SOP

A missing tool is a FOD hazard, so the aircraft is held (normally with a Red X) until the tool is found or the loss is resolved per tool control procedures.

Question 9: When safety wiring a pair of bolts with the double-twist method, which way should the wire pull?

In the loosening direction
In the tightening direction (Correct answer)
Straight across, with no direction
Toward the nearest structure

Correct answer: In the tightening direction

Safety wire is installed so that any tendency of the fastener to loosen puts more tension on the wire.

Question 10: How should a used cotter pin be handled during reassembly?

Throw it away and install a new one (Correct answer)
Straighten and reuse it once
Reuse it if there is no visible corrosion
Reuse it if it is the same size

Correct answer: Throw it away and install a new one

Cotter pins are one-time-use items and are replaced with new ones on reassembly.

Question 11: A self-locking nut can be run all the way down the bolt with fingers alone. What should you do?

Use it with extra torque
Add thread-locking compound
Replace it, because it has lost its locking feature (Correct answer)
Safety wire it instead

Correct answer: Replace it, because it has lost its locking feature

If a self-locking nut no longer meets its minimum prevailing torque, it has lost its locking ability and must be replaced.

Question 12: What is the maximum number of threads that may be exposed outside a turnbuckle barrel at each end?

None
Five
Six
Three (Correct answer)

Correct answer: Three

Standard aviation practice allows no more than three threads exposed at each end, so enough thread is engaged.

Question 13: Which TM suffix marks the field-level maintenance manual for an aircraft?

-10
-23 (Correct answer)
-CL
-MTF

Correct answer: -23

The -23 manuals cover field maintenance; -10 is the operator's manual, -CL the checklist, and -MTF the test flight manual.

Question 14: Which TM gives general aviation maintenance procedures such as torque, safety wiring, and hardware practices?

TM 1-1500-204-23 (Correct answer)
TM 1-1500-344-23
TM 1-1500-328-23
TM 55-1500-342-23

Correct answer: TM 1-1500-204-23

The TM 1-1500-204-23 series covers general maintenance practices for Army aircraft.

Question 15: A torque wrench is used with an extension that adds length past the drive. Which formula gives the wrench setting?

TW = TA x (L + E) / L
TW = TA + E
TW = TA x L / (L + E) (Correct answer)
TW = TA - (L x E)

Correct answer: TW = TA x L / (L + E)

An extension increases leverage, so the setting is reduced: TW = TA x L / (L + E).

Question 16: Which DD Form tag is used for serviceable materiel?

DD Form 1577
DD Form 1574 (Correct answer)
DD Form 1577-2
DD Form 1576

Correct answer: DD Form 1574

DD Form 1574 is the Serviceable Tag-Materiel; the 1577 series is for unserviceable items.

Question 17: A removed component is unserviceable but repairable. Which tag goes on it?

DD Form 1574 (yellow)
DD Form 1577 (red)
DD Form 1577-2 (green) (Correct answer)
DD Form 1575 (brown)

Correct answer: DD Form 1577-2 (green)

DD Form 1577-2, Unserviceable (Reparable) Tag, is the green tag.

Question 18: How do you correct a wrong entry on a TAMMS-A maintenance form?

Erase it and rewrite it
Cover it with correction fluid
Tear out the page and start a new form
Draw a single line through it, initial it, and enter the correct information (Correct answer)

Correct answer: Draw a single line through it, initial it, and enter the correct information

Errors are lined out with a single line and initialed so the original entry stays readable for audit.

Question 19: What is the main purpose of the Army Oil Analysis Program (AOAP) for aircraft engines and gearboxes?

To find abnormal wear metals in oil samples before a component fails (Correct answer)
To set oil change intervals for ground vehicles only
To certify new oil brands
To replace scheduled inspections

Correct answer: To find abnormal wear metals in oil samples before a component fails

AOAP uses lab analysis of oil samples to spot wear trends and impending failures early.

Question 20: Which type of message is used to report an urgent safety problem that may require grounding or inspecting a fleet?

Maintenance Information Message (MIM)
Safety-of-Flight (SOF) message (Correct answer)
Equipment Improvement Recommendation
Product Quality Deficiency Report

Correct answer: Safety-of-Flight (SOF) message

SOF messages address hazards urgent enough to restrict, inspect, or ground aircraft.

Question 21: A part arrives new but defective. Which report should be submitted?

DA Form 2408-12
DD Form 365-4
SF 368, Product Quality Deficiency Report (Correct answer)
DA Form 2408-16

Correct answer: SF 368, Product Quality Deficiency Report

SF 368 reports quality deficiencies so the item can be investigated and the fault corrected.

AAC Maintenance Procedures & Standards

A crew chief finds a fault that makes the aircraft unsafe to fly.
Which status symbol goes on the aircraft forms?

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