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Aircraft Electrician interview questions and how to answer them

An aircraft electrician interview is mostly a test of how you think when a wire misbehaves. Expect a lead or a shop supervisor to walk you through real faults, ask how you'd repair and document them, and watch whether you'd guess or check the manual. Some shops add a hands-on test at a bench, so be ready to strip, crimp and pin a connector in front of someone.

12 questions8 minute read

Part 1

1.Walk me through how you'd troubleshoot an intermittent fault that only shows up in flight.

Why they ask

Intermittent faults are the hardest work in the job and the easiest place to waste hours swapping parts. They want to see a method, not luck.

How to answer

  • Start with the pilot write-up and any fault history or maintenance messages, and ask the crew what else was happening when it dropped out
  • Pull the wiring diagram and find every connector, splice and ground in the circuit, paying attention to spots that flex, get wet or see vibration
  • Wiggle-test harnesses and connectors with a meter connected, and check for chafing, corrosion or backed-out pins
  • Fix what you find, then say how you'd confirm it and what you'd write so the next tech can follow the trail if it comes back

2.You find a damaged wire in a bundle. How do you decide whether to splice it or replace it?

Why they ask

Repair limits come from the manufacturer's standard wiring practices manual, and they want proof you look it up rather than improvise.

How to answer

  • Check the standard wiring practices or maintenance manual for the allowed repair on that wire type and location
  • Mention the limits that often matter: whether splices are allowed in that zone, how far apart they must sit, and whether it's a shielded or high-temperature wire
  • Use the specified splice, sleeve and crimp tool, and stagger splices so the bundle doesn't bulge
  • Replace the whole run when the manual says so or when damage is spread along it

3.How do you make sure a crimp is good?

Why they ask

A bad crimp can pass a quick look and fail weeks later. This question tells them how much you respect the small steps.

How to answer

  • Pick the crimp tool, positioner and die setting the manual calls for with that contact and wire gauge
  • Confirm the tool's calibration is current before you use it
  • Strip to the right length with no nicked or cut strands, and check the wire sits fully in the barrel with the inspection hole showing
  • Pull-test or tug-test as your shop requires, and seat the pin in the connector until it clicks and holds
4.When would you use an insulation resistance tester instead of a regular multimeter?

Why they ask

Knowing which test fits the fault separates electricians who understand what they're measuring from those who just read numbers.

How to answer

  • A multimeter checks continuity and voltage, which finds opens and bad connections
  • An insulation resistance test finds breakdown between conductors or to ground that a meter won't see
  • Say you'd disconnect or protect sensitive equipment first, because the test voltage can damage avionics
  • Mention that you'd follow the manual's test voltage and pass value, not a number from memory
5.Tell me about how you make an aircraft safe before electrical work.

Why they ask

Shocks, powered actuators and accidental engagement all happen when people skip steps. They're checking your habits, not your knowledge.

How to answer

  • Remove external and battery power as the task requires, and open, collar and tag the relevant circuit breakers
  • Put warning tags on the flight deck so nobody restores power while you're in the system
  • Take ESD precautions when handling sensitive units, with a wrist strap and proper bags
  • Reverse the steps in order and check with the crew or lead before power goes back on

Part 2

6.What's the difference between a bonding check and a continuity check, and why does bonding matter?

Why they ask

Bonding is aircraft-specific and often weak in people coming from building trades.

How to answer

  • Bonding measures very low resistance between structure and components with a low-resistance ohmmeter
  • It protects against lightning strike, static buildup and radio interference
  • Clean the contact surfaces to bare metal as the manual says, then restore the finish after the check
  • Continuity just tells you a circuit is complete; it doesn't prove a bond is good enough
7.You're halfway through a job and your shift ends. What do you hand over?

Why they ask

Plenty of maintenance incidents trace back to a poor shift turnover. Supervisors want someone whose handoffs they can trust.

How to answer

  • Write up exactly which steps are done and which aren't on the task card or work order
  • Note open panels, disconnected connectors, pulled breakers and any parts on order
  • Talk face to face with the incoming tech when you can, and walk them to the aircraft
  • Leave tools accounted for and the area clean
8.Ops is pushing you to sign off so the aircraft can leave, but you're not sure the fix is right. What do you do?

Why they ask

This is the pressure moment in the job, and they want to know you won't fold.

How to answer

  • Say plainly that you won't sign for work you can't stand behind
  • Tell your lead early so planners can look at a deferral under the approved minimum equipment list if one applies
  • Give ops a realistic time estimate instead of a hopeful one
  • Frame it as protecting the aircraft and the company, not refusing to help
9.How do you write a good maintenance record entry?

Why they ask

Your signature is a legal record, and vague entries cause repeat faults and audit trouble.

How to answer

  • Describe what you found, where, and what you did, in plain terms
  • Reference the manual section or approved data you worked to
  • Record part numbers and serial numbers for anything removed or installed
  • Keep it clear enough that a stranger could follow it a long time later
10.Tell me about a time you made a mistake on the job.

Why they ask

Aviation depends on people reporting errors. They're checking honesty and whether you learned something specific.

How to answer

  • Pick a real, modest mistake, such as a missed step you caught at inspection
  • Say how you found it and that you reported it rather than quietly fixing it
  • Explain the change you made to your own routine afterward

Part 3

11.How do you handle tool control and foreign object debris?

Why they ask

A dropped washer or a forgotten screwdriver can end up in a control run or an engine. Shops take this seriously.

How to answer

  • Use the shadow board or tool checkout system and inventory before closing any panel
  • Bag and count small hardware, and pick up wire clippings as you go
  • Report a missing tool right away and stop the aircraft from releasing until it's found
12.What aircraft types or systems have you worked on most?

Why they ask

They're sizing up how much training you'll need on their fleet and whether you inflate your experience.

How to answer

  • Name the types and systems honestly: power generation, lighting, fuel quantity, wiring bundle builds
  • Say which you've signed for versus assisted on
  • Show you know how you'd get up to speed on their aircraft, through the manuals and type training

Questions to ask them

Ask at least two. It shows you're picking them too.

  • What aircraft types and systems would I spend most of my time on?
  • How do you handle shift turnover, and what does a typical night look like when an aircraft is stuck waiting on a fix?
  • Which company authorizations or type training would I need, and how do people usually get them?
  • Which tools does the crib supply, and which am I expected to bring?
  • How does the shop treat someone who reports their own error?

Related interview guides

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