Maintenance Airframe; Maintenance Powerplant
Communication Breakdown; Situational Awareness; Confusion
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Manuals; Aircraft; Chart Or Publication; Human Factors
In the Cessna CE-560XL Maintenance Manual 27-90-30-720; Step (D); Monel rivets are said to be identified 'by dimple heads'. Industry uses 'Double Dimple' as the head marking for Monel MS20615M rivets. Rivets with one dimple would be standard aluminum alloy rivets and would be unsuited for the elevator location described in the above reference. Suggest the Maintenance Manual reference needs revising to have the Mechanic inspecting for 'Double Dimple' heads; not 'Dimple heads'.
A Technician reports that in the Cessna CE-560XL Maintenance Manual 27-90-3--720; Step (D); Monel rivets are said to be identified 'by Dimple heads'. Industry standards use 'Double Dimple' as the head marking. Maintenance Manual needs revising to have the Mechanic check that 'Double Dimple head' Monel type rivets are installed in the Elevator area; not 'Dimple heads'.