Airworthiness Directive · Amendment 39-18856 · Fuselage
Learjet, Inc., Airplanes
Superseded. A later AD replaced this one: AD 2017-11-09. Comply with the one in force.
This AD applies to Learjet, Inc., Model 60 airplanes, certificated in any category, serial numbers 60-002 through 60-430 inclusive.
We are adopting a new airworthiness directive (AD) for certain Learjet, Inc., Model 60 airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the upper fuselage skin under the aft oxygen line fairing is subject to multi-site damage (MSD). This AD requires a one-time inspection of the fuselage skin for corrosion, and related investigative and corrective actions if necessary. We are issuing this AD to address the unsafe condition on these products.
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 the effective date of this AD: Within 12 months after the effective date of this AD.
(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 the effective date of this AD: Within 24 months after the effective date of this AD.
(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 the effective date of this AD: Within 36 months after the effective date of this AD.
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.
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 the effective date of this AD: Submit the report within 30 days after the inspection.
(2) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
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
