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 1998_register executive 2010-09-24 article Rules and Regulations D09002ee1bdfebf3c D09002ee1bdfebfe9 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 document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-23-01, which was sent previously to all known U.S. owners and operators of aircraft and engines equipped with certain Parker Hannifin Airborne dry air pumps, conversion kits, and coupling kits, utilizing part number (P/N) B1-19-1 flexible coupling that has a date code resembling a clockface and indicating a manufacture date of either ``12/97'' or ``5-6/98''. This AD requires replacing the affected flexible coupling with P/N B1-7-3 flexible coupling (part of Parker Hannifin flexible coupling kit, Airborne P/N 350). The AD resulted from reports of failure of the affected flexible coupling due to a manufacturing defect of this coupling. The actions specified by this AD are intended to prevent failure of the primary dry air pump caused by defective flexible coupling, which could result in loss of primary attitude and direction references during instrument flight rules (IFR) operations. 63 FR 63784 https://www.govinfo.gov/app/details/FR-1998-11-17/98-30170 98-30170 fr17no98-2 RIN 2120-AA64 4910-13-P Docket No. 98-CE-108-AD Amendment 39-10882 AD 98-23-01 https://www.govinfo.gov/app/details/FR-1998-11-17/98-30170 https://www.govinfo.gov/content/pkg/FR-1998-11-17/html/98-30170.htm https://www.govinfo.gov/content/pkg/FR-1998-11-17/pdf/98-30170.pdf 5 p. 63784 63788 63 FR 63784 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Parker Hannifan Airborne Dry Air Pumps, Conversion Kits, and Coupling Kits; Federal Register Vol. 63, Issue RULE 98-30170 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 1998-11-20 Docket No. 98-CE-108-AD Amendment 39-10882 AD 98-23-01 4910-13-P 98-30170 Final rule; request for comments.

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-23-01, which was sent previously to all known U.S. owners and operators of aircraft and engines equipped with certain Parker Hannifin Airborne dry air pumps, conversion kits, and coupling kits, utilizing part number (P/N) B1-19-1 flexible coupling that has a date code resembling a clockface and indicating a manufacture date of either ``12/97'' or ``5-6/98''. This AD requires replacing the affected flexible coupling with P/N B1-7-3 flexible coupling (part of Parker Hannifin flexible coupling kit, Airborne P/N 350). The AD resulted from reports of failure of the affected flexible coupling due to a manufacturing defect of this coupling. The actions specified by this AD are intended to prevent failure of the primary dry air pump caused by defective flexible coupling, which could result in loss of primary attitude and direction references during instrument flight rules (IFR) operations.

Effective November 20, 1998, to all persons except those to whom it was made immediately effective by priority letter AD 98-23-01, issued October 29, 1998, which contained the requirements of this amendment. Mr. Roy Boffo, Aerospace Engineer, FAA, Chicago Aircraft Certification Office, Systems and Flight Test Branch, 2300 E. Devon Avenue, Des Plaines, Illinois 60018; telephone: (847) 294-7564; facsimile: (847) 294-7834. Vol. 63, no. 221 Office of the Federal Register, National Archives and Records Administration 1998-11-17 continuing daily deposited born digital 198 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-1998-11-17 P0b002ee180a637ea 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr17no98 https://www.govinfo.gov/app/details/FR-1998-11-17 https://www.govinfo.gov/content/pkg/FR-1998-11-17/pdf/FR-1998-11-17.pdf fdlp 63781 63967 DGPO 2010-09-24 2023-05-06 FR-1998-11-17 machine generated eng FR FR-1998-11-17 63 221