AD NUMBER: 2019-19-11

PRODUCT: Certain Pratt & Whitney (PW) PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A model turbofan engines.

ACTION: Final rule; request for comments.

SUMMARY: This AD requires initial and repetitive inspections of the low-pressure compressor (LPC) inlet guide vane (IGV) and the LPC rotor 1 (R1) and, depending on the results of the inspections, possible replacement of the LPC.

This AD was prompted by two recent in-flight shutdowns (IFSDs) that occurred as the result of failures of the LPC R1.

DATES: This AD is effective September 26, 2019. Comments must be received by November 12, 2019.

COST: The FAA estimates that this AD affects 18 engines installed on airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

• Borescope inspection per inspection cycle 4 work-hours × $85 per hour = $340 per engine.
• On-Condition Costs
• Replace LPC 40: work-hours × $85 per hour = $3,400 labor. Parts: $156,000. Cost per engine: $159,400.

FMI: AD