Airworthiness directives › 2014-07-10
AD 2014-07-10 Airworthiness Directives; Ballonbau Wörner GmbH Balloons
Applicability*9
This AD applies to Ballonbau Wörner GmbH Model NL-280/STU, NL-380/STU, NL-510/STU, NL-640/STU, NL-840/STU, and NL-1000/STU balloons, all serial numbers, certificated in any category.
Compliance
Unless already done, do the actions in paragraphs (f)(1) through (f)(4) of this AD: (1) Before further flight after May 27, 2014 (the effective date of this AD), complete all inspections and maintenance tasks described in the Chapter 5, Annual Inspection, in the Ballonbau Wörner GmbH Instructions for Continued Airworthiness, Gas Balloon Model NL-STU, Issue 1, pages 44 through 53 and 55 through 69, dated November 2013, and page 54 dated December 2013. (2) If any discrepancies are found during the inspection required in paragraph (f)(1) of this AD, before further flight, repair as applicable following Chapter 6, Standard Repair Procedures, in the Ballonbau Wörner GmbH Instructions for Continued Airworthiness, Gas Balloon Model NL-STU, Issue 1, dated November 2013. (3) If on May 27, 2014 (the effective date of this AD), a balloon has already exceeded the threshold compliance time for the porosity test as defined in Sections 5.1.1.4, 5.1.2.4 and 5.1.3.4 of Chapter 5 in Ballonbau Wörner GmbH Instructions for Continued Airworthiness, Gas Balloon Model NL-STU, Issue 1, pages 44 through 53 and 55 through 69, dated November 2013, and page 54 dated December 2013, within 3 months after May 27, 2014 (the effective date of this AD), conduct the porosity test following Sections 5.1.1.4, 5.1.2.4 and 5.1.3.4 of Chapter 5 in Ballonbau Wörner GmbH Instructions for Continued Airworthiness, Gas Balloon Model NL-STU, Issue 1, pages 44 through 53 and 55 through 69, dated November 2013, and page 54 dated December 2013. (4) After May 27, 2014 (the effective date of this AD), do all inspections and necessary repairs following Technische Mitteilung (English translation: Technical Note) Ballonbau Wörner GmbH EASA.BA.009-6, dated November 7, 2013; and Ballonbau Wörner GmbH Instructions for Continued Airworthiness, Gas Balloon Model NL-STU, Issue 1, pages 1 through 6, 8 through 16, 18, 20 through 34, 36 through 40, 42 through 53, and 55 through 82, dated November 2013; and pages 7, 17, 19, 35, 41, and 54, dated December 2013. Note 1 to paragraph (f) of this AD: Pilots may only accomplish preventative maintenance limited to those items identified in 14 CFR Part 43, Appendix A.
Required actions
The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, Standards Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Karl Schletzbaum, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4123; fax: (816) 329-4090; email: karl.schletzbaum@faa.gov . Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service.
Unsafe condition
This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as current inspection intervals are no longer adequate to ensure timely detection of deterioration or damage. If this condition is uncorrected, it could result in reduced structural integrity of the balloon.
Affected ADs
None.
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