United States Government Publishing Office publisher pbl distributor dst United States National Archives and Records Administration Office of the Federal Register author aut Government Organization text government publication eng FR Regulatory Information 1997_register executive 2010-09-24 article Rules and Regulations D09002ee1be007c8b D09002ee1be007d4b United States Department of Transportation originator org United States Government Agency or Subagency United States Federal Aviation Administration originator org United States Government Agency or Subagency This amendment supersedes an existing airworthiness directive (AD), applicable to certain Teledyne Continental Motors (TCM) IO-520 and TSIO-520 series reciprocating engines, that currently requires ultrasonic inspection for subsurface fatigue cracks in crankshafts installed in TCM IO-520 and TSIO-520 series engines and replacement of the crankshaft if a crack is found. This amendment adds a requirement to remove crankshafts manufactured using the airmelt process and replace them with crankshafts manufactured using the vacuum arc remelt (VAR) process, incorporates new ultrasonic inspection criteria in the AD, adds engine series TCM IO-360, TSIO-360, LTSIO-360, IO-520, LIO- 520, TSIO-520, LTSIO-520 and Rolls-Royce, plc IO-360 and TSIO-360 to the applicability, and revises the economic impact analysis. This amendment is prompted by reports of crankshaft failures due to subsurface fatigue cracking on engines that had been inspected in accordance with the current AD. The actions specified by this AD are intended to prevent crankshaft failure and subsequent engine failure. 62 FR 66502 https://www.govinfo.gov/app/details/FR-1997-12-19/97-33142 97-33142 fr19de97-5 RIN 2120-AA64 4910-13-P Docket No. 93-ANE-08 Amendment 39-10260 AD 97-26-17 https://www.govinfo.gov/app/details/FR-1997-12-19/97-33142 https://www.govinfo.gov/content/pkg/FR-1997-12-19/html/97-33142.htm https://www.govinfo.gov/content/pkg/FR-1997-12-19/pdf/97-33142.pdf 5 p. 66502 66506 62 FR 66502 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Teledyne Continental Motors IO-360, TSIO-360, LTSIO-360, IO-520, LIO-520, TSIO-520, LTSIO-520 Series, and Rolls-Royce plc IO-360 and TSIO-360 Series Reciprocating Engines; Federal Register Vol. 62, Issue RULE 97-33142 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 1998-01-23 Docket No. 93-ANE-08 Amendment 39-10260 AD 97-26-17 4910-13-P 97-33142 Final rule.

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Teledyne Continental Motors (TCM) IO-520 and TSIO-520 series reciprocating engines, that currently requires ultrasonic inspection for subsurface fatigue cracks in crankshafts installed in TCM IO-520 and TSIO-520 series engines and replacement of the crankshaft if a crack is found. This amendment adds a requirement to remove crankshafts manufactured using the airmelt process and replace them with crankshafts manufactured using the vacuum arc remelt (VAR) process, incorporates new ultrasonic inspection criteria in the AD, adds engine series TCM IO-360, TSIO-360, LTSIO-360, IO-520, LIO- 520, TSIO-520, LTSIO-520 and Rolls-Royce, plc IO-360 and TSIO-360 to the applicability, and revises the economic impact analysis. This amendment is prompted by reports of crankshaft failures due to subsurface fatigue cracking on engines that had been inspected in accordance with the current AD. The actions specified by this AD are intended to prevent crankshaft failure and subsequent engine failure.

Effective January 23, 1998. Jerry Robinette, Aerospace Engineer, Atlanta Aircraft Certification Office, FAA, Small Airplane Directorate, Campus Building, 1701 Columbia Ave., Suite 2-160, College Park, GA 30337-2748; telephone (404) 305-7371, fax (404) 305-7348. Vol. 62, no. 244 Office of the Federal Register, National Archives and Records Administration 1997-12-19 continuing daily deposited born digital 328 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-1997-12-19 P0b002ee180a413e7 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr19de97 https://www.govinfo.gov/app/details/FR-1997-12-19 https://www.govinfo.gov/content/pkg/FR-1997-12-19/pdf/FR-1997-12-19.pdf fdlp 66495 66811 DGPO 2010-09-24 2023-05-06 FR-1997-12-19 machine generated eng FR FR-1997-12-19 62 244