To perform a symmetry alignment check for a particular aircraft, where can you find precise information?

The aircraft service or maintenance manual is the most reliable source for precise information when performing a symmetry alignment check. This manual is specifically designed to provide technicians with detailed procedures, specifications, and tolerances pertinent to the aircraft's maintenance and operational checks. It often includes step-by-step instructions, diagrams, and specific measurement criteria that ensure accuracy when checking alignment.

The pilot's operating handbook, while important for operational procedures and performance data, does not typically cover maintenance procedures like symmetry alignment checks. The aircraft’s safety report and engineer’s survey report may offer insights into safety assessments or structural conditions, but they are not primarily intended for the detailed technical information needed for alignment checks.