Airworthiness directives › 2020-04-01
AD 2020-04-01 Airworthiness Directives; Pratt & Whitney Turbofan Engines
Applicability*9
This AD applies to all Pratt & Whitney (PW) PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A model turbofan engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 300 engine cycles from the effective date of this AD, perform an initial gap inspection with a 0.001 inch feeler gauge between the LP10 oil supply tube, part number (P/N) 5312624-01, and the FOC, P/N 5306769. (i) If any gap is found, remove the LP10 oil supply tube and the FOC and replace with parts eligible for installation prior to further flight. (ii) If no gap is found, repeat this inspection every 850 engine cycles since the previous inspection. (2) At the next shop visit after the effective date of this AD, remove the LP10 oil supply tube, P/N 5312624-01, and the FOC, P/N 5306769, and replace with parts eligible for installation.
Unsafe condition
This AD was prompted by reports of two in-flight shutdowns due to oil leaking from the connection between the LP10 oil supply tube and the fuel oil cooler (FOC). The FAA is issuing this AD to prevent failure of the LP10 oil supply tube, engine fire and damage to the airplane. The unsafe condition, if not addressed, could result in engine fire and damage to the airplane.
Affected ADs
None.
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