What’s that you’re doing, Mr. Arnold?

Peer Niklas Arnold, aircraft mechanic, is checking bearing shells of an Airbus A320
© Sonja Brüggemann/LH Technik

Peer Niklas Arnold, 39,

Aircraft mechanic and measurement engineer

has been with Lufthansa Technik in Hamburg for 18 years


“Is everything here really precise to the last micrometer? Aircraft components call for maximum accuracy. Sometimes even a few thousandths of a millimeter, or micrometers, can make all the difference. High-precision parts – such as these bearing shells, which should soon be in service inside the auxiliary power unit (APU) of an Airbus A320 – need to be very carefully measured before they can be installed in an aircraft. With the aid of a coordinate measuring machine, I check whether the bearing shells meet the prescribed specifications. The joystick lets me move a measuring probe freely to obtain a thorough scan of each shell. Alternatively, I can program the machine so that it works fully automatically. Should I determine deviations from the target values, a precisely regulated process will be set in motion. The component then goes back to the technician responsible, who will either rework it – or scrap it.”