A gripe sheet is used for pilots to report defects to engineers, here is a list of true gripes from a well known Australian airline :
Noise under instrument panel, sounds like a midget pounding away with a hammer
Reply is : Hammer removed from midget .
Mouse under cockpit .
Reply is : Cat installed .
Left inside tire almost needs replacing .
Reply is : Almost replaced it .
Test flight ok but autoland very rough .
Reply is : Autoland not installed on this aircraft .
Something loose in in cockpit .
Reply is : Something tightened in cockpit .
Dead bugs on windshield .
Reply is : Live bugs on back order .
Number 3 engine missing .
Reply is : Number 3 engine found after brief search on right wing .
Evidence of leak on landing gear .
Reply is : Evidence of leakage removed .
Aircraft handles funny.
Reply is : Aircraft told to fly straight, and to be serious .
Suspected crack in windshield .
Reply is : Suspect that you are right .