FAA AMT Airframe Test 2026 – 400 Free Practice Questions to Pass the Exam

Glass cracked. In an aircraft instrument, a cracked glass can affect the accuracy and readability of the instrument. A cracked glass may allow moisture or contaminants to enter the instrument, potentially causing further damage or affecting the readings. Therefore, a cracked glass is considered a more critical discrepancy compared to a chipped case paint or a leaking case. It is important to replace an instrument with a cracked glass to ensure proper functioning and safety of the aircraft.