What additional information should be included on the attached sheet(s) when more specifications are needed for a work description on FAA Form 337?

Including the aircraft nationality and registration mark, along with the date the work was accomplished, is essential when providing additional information on FAA Form 337. This crucial data helps to establish a clear identification of the aircraft to which the modifications or repairs pertain, ensuring that all records align accurately with the specific aircraft's log and regulatory requirements.

The date of the work completion is also vital as it provides a timeline for maintenance records and compliance with any required inspections, thereby fostering accurate historical documentation of the aircraft’s service history. These details support accountability and traceability in aviation maintenance, which are critical for both regulatory compliance and safety.

While photos of the work conducted might be useful for visual documentation, they do not replace the need for clear identification details on the form itself. Similarly, knowing only the name of the inspecting mechanic does not encompass the essential regulatory requirements for identification. Historical maintenance records may provide context but are not required for supplementing work descriptions on the FAA Form 337 in the same manner as identification and date specifics are.