A&P Mechanic interview questions for employers
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How do you verify the flight control cable tension after a replacement?
A qualified candidate describes using a calibrated tensiometer to measure existing cable settings before removal. They note the ambient temperature during measurement because thermal expansion changes metal length. They reference the specific airframe maintenance manual for the exact tension range required for the model. A strong follow-up question explores how they handle situations where the turnbuckle is already at its limit of adjustment. The candidate should mention checking the cable routing path for binding or pulley wear. A red flag appears if the mechanic suggests guessing tension by feel or relies on common practice rather than documented values. Ignoring the locking mechanism requirement after adjustment indicates a serious safety oversight regarding the flight control system integrity.
Which specific credentials and endorsements do you hold for current work?
The mechanic must present an active Federal Aviation Administration airframe and powerplant certificate. They should explain any additional endorsements like Inspection Authorization or specific aircraft type ratings held. A candidate mentioning an FCC license demonstrates relevant competence for avionics integration work. Follow up by asking how they stay informed about new airworthiness directives that impact their specific certificate areas. They should detail their method for reviewing mandatory bulletins regularly. A red flag is an expired certificate or a vague answer about current credentials. Candidates who claim to hold certifications but lack the physical documents or registry verification are immediate disqualifications for any maintenance role requiring official sign-offs on airworthy parts.
What is your systematic approach for troubleshooting a hydraulic landing gear leak?
The technician explains the work sequence starting with cleaning the area to isolate the source of fluid seepage. They verify the integrity of lines and fittings before checking internal seal wear. They use a standard hydraulic test stand to pressurize the system for a controlled observation. Ask them how they distinguish between weeping fluid and a true system failure. An experienced mechanic checks the reservoir levels and filters for debris that indicates component degradation. A red flag occurs if they suggest tightening fittings without checking for deformed flares or damaged O-rings. Relying on makeshift repair methods instead of replacing suspect seals or faulty hydraulic lines points to unsafe maintenance habits.
How do you handle your shift responsibilities and travel requirements?
The candidate should state their availability for rotating shifts or irregular hours common in hangar operations. They must confirm willingness to deploy to remote locations on short notice if an aircraft grounded condition arises. Ask them to describe their personal method for managing fatigue during long maintenance windows or overnight duty cycles. A reliable mechanic maintains a travel kit with essential hand tools and documents ready to go. They should communicate clearly regarding their ability to adapt to changes in the maintenance schedule. A red flag involves a refusal to work weekends or a pattern of absenteeism in their history. Inflexible workers struggle with the operational demands of aircraft repair.
What steps do you take when performing a logbook entry and handover?
The mechanic describes writing the entry in clear language while referencing the maintenance manual paragraph number and date. They ensure the description matches the work performed exactly. A good follow-up involves asking how they verify that the next shift understands the status of an incomplete task. The candidate should mention using a formal turnover log to document the exact state of assembly and the tools removed from the aircraft. A red flag is an incomplete entry or a failure to sign off their own work properly. They must demonstrate accountability for their specific tasks. Omitting the signature or failing to document the parts replaced creates a breakdown in the airworthiness chain.
How do you manage the use and calibration of precision measurement tools?
A skilled mechanic explains the routine of verifying the calibration sticker on torque wrenches and micrometers before use. They describe keeping tools clean and storing them in protective cases when finished with the task. Ask them what they do if they drop a precision tool during a shift. The correct answer involves removing the tool from service immediately for recalibration. A red flag appears if the candidate claims they never check calibration dates or ignores the damage after dropping a gauge. Using uncalibrated equipment leads to inaccurate adjustments on critical bolts or structural components. This indicates a disregard for the strict safety standards essential for maintaining structural integrity on every aircraft.
Can you explain your workflow for replacing a structural rivet on a wing skin?
The candidate outlines the process starting with identifying the correct rivet alloy and size according to the repair scheme. They describe the steps of drilling out the old fastener without enlarging the hole. They use a bucking bar and air hammer or a hand squeezer to set the new rivet to the proper flushness or head diameter. A meaningful follow-up question focuses on how they inspect the surrounding material for cracks during the removal process. They should discuss applying corrosion-resistant primer to the holes before installation. A red flag is the use of incorrect rivet patterns or failing to deburr the hole before setting the fastener. Poor hole preparation causes structural fatigue over time.
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