Airworthiness Directive · Amendment 39-18908 · Fuselage
Learjet, Inc., Airplanes
Superseded. A later AD replaced this one: AD 2019-17-01. Comply with the one in force.
This AD applies to Learjet, Inc., Model 60 airplanes, certificated in any category, having serial numbers 60-002 through 60-430 inclusive, and having a configuration identified in paragraph (c)(1) or (c)(2) of this AD.
(1) Airplanes with a dorsal-mounted oxygen bottle.
(2) Airplanes that have had the dorsal-mounted oxygen bottle removed but have retained the oxygen line fairing installed on top of the fuselage.
We are superseding Airworthiness Directive (AD) 2017-08-07 for certain Learjet, Inc., Model 60 airplanes. AD 2017-08-07 required a one-time inspection of the fuselage skin for corrosion, and related investigative and corrective actions if necessary. This new AD retains the actions of AD 2017-08-07 and removes certain airplanes from the applicability. This AD was prompted by a determination that only certain airplanes are affected by the unsafe condition. We are issuing this AD to address the unsafe condition on these products.
This paragraph restates the requirements of paragraph (g) of AD 2017-08-07, with no changes. At the applicable time specified in paragraph (g)(1), (g)(2), or (g)(3) of this AD: Do a fluorescent dye penetrant inspection of the fuselage skin between stringers (S)-2L and S-2R for corrosion; and do all applicable related investigative and corrective actions; in accordance with the Accomplishment Instructions of Learjet 60 Service Bulletin 60-53-19, Revision 3, dated August 29, 2016, except as required by paragraph (h) of this AD. Do all applicable related investigative and corrective actions before further flight.
(1) For airplanes with more than 12 years since the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness as of May 22, 2017 (the effective date of AD 2017-08-07): Within 12 months after May 22, 2017.
(2) For airplanes with more than 6 years but equal to or less than 12 years since the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness as of May 22, 2017 (the effective date of AD 2017-08-07): Within 24 months after May 22, 2017.
(3) For airplanes with 6 years or less since the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness as of May 22, 2017 (the effective date of AD 2017-08-07): Within 36 months after May 22, 2017.
This paragraph restates the requirements of paragraph (h) of AD 2017-08-07, with no changes. Where Learjet 60 Service Bulletin 60-53-19, Revision 3, dated August 29, 2016, specifies contacting Learjet, Inc., for appropriate action: Before further flight, repair using a method approved in accordance with the procedures specified in paragraph (l) of this AD.
This paragraph restates the requirements of paragraph (i) of AD 2017-08-07, with no changes. At the applicable time specified in paragraph (i)(1) or (i)(2) of this AD: Submit a report of the findings (both positive and negative) of the inspection required by the introductory text of paragraph (g) of this AD to: Wichita-COS@faa.gov; or Ann Johnson, Wichita Aircraft Certification Office (ACO), 1801 Airport Road, Wichita, KS 67209. The report must include the name of the owner, the address of the owner, the name of the organization incorporating Learjet 60 Service Bulletin 60-53-19, the date that inspection was completed, the name of the person submitting the report, the address, telephone number, and email of the person submitting the report, the airplane serial number, the total time (flight hours) on the airplane, the total number of landings on the airplane, whether corrosion was detected, whether corrosion was repaired, the structural repair manual (SRM) chapter and revision used (if repaired), and whether corrosion exceeded the minimum thickness specified in Learjet 60 Service Bulletin 60-53-19 (and specify the SRM chapter and revision, if used as an aid to determine minimum thickness).
(1) If the inspection was done on or after May 22, 2017 (the effective date of AD 2017-08-07): Submit the report within 30 days after the inspection.
(2) If the inspection was done before May 22, 2017 (the effective date of AD 2017-08-07): Submit the report within 30 days after May 22, 2017.
This paragraph restates the credit provided in paragraph (j) of AD 2017-08-07, with no changes. This paragraph provides credit for the actions specified in the introductory text to paragraph (g) of this AD, if those actions were performed before May 22, 2017 (the effective date of AD 2017-08-07), using Learjet 60 Service Bulletin 60-53-19, dated November 23, 2015; Learjet 60 Service Bulletin 60-53-19, Revision 1, dated April 4, 2016; or Learjet 60 Service Bulletin 60-53-19, Revision 2, dated April 18, 2016.
A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 2120-0056. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave. SW., Washington, DC 20591, Attn: Information Collection Clearance Officer, AES-200.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
