FAA Powerplant Written Practice Test

What publication is used to obtain crankshaft runout tolerance after a ground incident causing propeller stoppage?

1. Federal Aviation Regulations

2. Aircraft Maintenance Manual

3. Current manufacturers maintenance instructions

4. Aviation Safety Reporting System

The correct answer is: Current manufacturers maintenance instructions

The correct choice, which is current manufacturers maintenance instructions, is vital because these instructions provide specific guidance tailored to the particular aircraft and its components. After an incident involving propeller stoppage, the manufacturer’s maintenance instructions detail the proper procedures and tolerances for assessing the crankshaft, including runout tolerance. This information is crucial for ensuring that any damage or wear is identified, and that the engine is functioning within safe operational limits after the incident. While other publications like the Federal Aviation Regulations or the Aircraft Maintenance Manual may offer some relevant standards or general guidelines, they do not provide the specific details necessary for determining crankshaft runout tolerance after such an incident. The Aviation Safety Reporting System serves a different purpose, focusing on the collection and analysis of safety-related data rather than providing maintenance protocols. Thus, using the current manufacturers maintenance instructions ensures compliance with the latest safety standards and mitigates the risk of further issues.