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Airworthiness Directive

AD 98-02-08 63 FR 4154 Active

Federal Aviation Administration · 14 CFR part 39

Requires visual inspections of the inside diameter (ID) of the crankshaft for corrosion pits, and if corrosion pits are found during this inspection, prior to further flight, performing a magnetic particle inspection (MPI) or…

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FR document
98-1705
Amendment
39-10291
Published
1998-01-28
Effective
1998-03-30
Models covered
2

Last live check: 2026-08-19

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AD

98-02-08

FR doc 98-1705 · 63 FR 4154

AD 98-02-08Published 1998-01-28Effective 1998-03-30

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires visual inspections of the inside diameter (ID) of the crankshaft for corrosion pits, and if corrosion pits are found during this inspection, prior to further flight, performing a magnetic particle inspection (MPI) or fluorescent penetrant inspection (FPI) of the ID for cracks.

Full official abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Textron Lycoming 320 and 360 series reciprocating engines, that requires visual inspections of the inside diameter (ID) of the crankshaft for corrosion pits, and if corrosion pits are found during this inspection, prior to further flight, performing a magnetic particle inspection (MPI) or fluorescent penetrant inspection (FPI) of the ID for cracks. In addition, this AD requires reporting findings of inspections to the FAA. Finally, terminating action to the inspections of this AD is the application of a preventive treatment coating on non- corroded crankshafts to prevent corrosion. This amendment is prompted by reports of cracks in crankshafts originating from corrosion pits in the ID. The actions specified by this AD are intended to prevent crankshaft failure, which can result in engine failure, propeller separation, forced landing, and possible damage to the aircraft.

More directives for Lycoming O-320

  1. AD 2022-16-03 Airworthiness Directives; Continental Aerospace Technologies, Inc., Lyco... Effective 2022-08-15
  2. AD 96-23-03 Airworthiness Directives; Textron Lycoming Reciprocating Engines Effective 1996-12-17

All Lycoming O-320 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 2 models in our index