Summary
We propose to adopt a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW4052, PW4056, PW4060, PW4062, PW4062A, PW4152, PW4156A, PW4158, PW4460, and PW4462 turbofan engine models, including engines identified with suffixes -1C, -1E, -3, -3A, or -3B. This proposed AD was prompted by the discovery of multiple cracked 4th stage low-pressure turbine (LPT) air seals in the fleet. This proposed AD requires removal from service of certain air seals. We are proposing this AD to correct the unsafe condition on these products.
Directive Details
AD Number
FAA-2017-0817
Document Number
2017-21558
Type
Proposed Rule
Publication Date
October 12, 2017
Comments Close
November 27, 2017
Affected Manufacturer
Pratt & Whitney Division Turbofan
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2017-0817
Topics
Official Documents
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