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Removing wheels from a dual-wheel gear on jacks

Aviation Mechanic Airframe (AMA) practice question 5 of 17 on Landing Gear Systems. ACS element AM.II.E.R1 · difficulty: standard. Want to answer it in a timed quiz? Use the Aviation Mechanic Airframe (AMA) practice mode.

Question bank updated 2026-09-22

QUESTIONAn aircraft with paired main wheels is on jacks for wheel removal. What precautionary measure is recommended?

  1. ARemove the wheels only after lowering the aircraft
  2. BRemove both wheels of the pair together
  3. CRemove only one wheel of the pair at a time
Show the answer and explanation

Correct answer: C. Remove only one wheel of the pair at a time

  • A — incorrect The wheel is removed with the aircraft supported on jacks; the precaution concerns how many assemblies come off at once.
  • B — incorrect Removing both leaves nothing under that gear if the aircraft comes off the jack, increasing damage and injury risk.
  • C — correct As a precaution, only one tire and wheel assembly of a pair is removed at a time, leaving an assembly in place should the aircraft fall off its jack.

BACKGROUND

Jacking is required for wheel removal, retraction tests, and much shock strut work, and jacks must always be placed under the prescribed jacking points provided on the gear or airframe. Because an aircraft can come off a jack, the handbook advises removing only one tire and wheel assembly from a pair at a time, so that a tire and wheel remains in place under that gear. That leaves less chance of damage to the aircraft and injury to personnel. When servicing shock struts, the technician is also told to make certain personnel, work stands, and other obstacles are clear of the aircraft before the work begins. During retraction testing the aircraft must be properly supported on jacks throughout.

STUDY TIP

Whenever a question puts an aircraft on jacks, look for the answer that keeps something under the aircraft or keeps people clear of it.

KEY POINTS

  • Remove only one wheel of a pair at a time while on jacks.
  • The remaining assembly limits damage if the aircraft falls off the jack.
  • Jacks go under the prescribed jacking points, with personnel and stands clear.

SOURCES

  • FAA-H-8083-31B ch13 "Off Aircraft Wheel Inspection"
  • FAA-H-8083-31B ch13 "Servicing Shock Struts"
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MORE ON LANDING GEAR SYSTEMS

SkyDrill is not affiliated with the FAA. This is an original practice item based on FAA-H-8083-31B Aviation Maintenance Technician Handbook – Airframe, and 14 CFR part 43. Regulations and handbooks are revised; confirm details against the current edition.