Airworthiness Directive · Amendment 39-21591 · Wings
Fokker Services B.V. Airplanes
This AD applies to all Fokker Services B.V. Model F28 Mark 0070 and 0100 airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Fokker Services B.V. Model F28 Mark 0070 and 0100 airplanes. This AD was prompted by a report that corrosion was found on the horizontal flange on the front spar lower boom, between the rebate strap and the lower boom, and resulted in bulging. This AD requires doing a detailed visual inspection to detect any bulging, loose, and missing countersunk fastener heads at the left-(LH) and right-hand (RH) outer wing lower skin of the front spar between certain wing stations, and applicable on-condition actions, as specified in a European Union Aviation Safety Agency (EASA), which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2021-0014, dated January 13, 2021 (EASA AD 2021-0014).
(1) Where EASA AD 2021-0014 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where paragraph (2) of EASA AD 2021-0014 requires additional actions for bulging “between 0.5 mm and 3 mm,” this AD requires those additional actions for bulging 0.5 mm or more and 3.0 mm or less.
(3) The “Remarks” section of EASA AD 2021-0014 does not apply to this AD.
(4) Paragraph (5) of EASA AD 2021-0014 specifies to report inspection results within a certain compliance time. For this AD, report the inspection results of each inspection accomplished in this AD at the applicable time specified in paragraph (h)(4)(i) or (ii) of this AD.
(i) If the inspection was done on or after the effective date of this AD: Submit the report within 30 days after the inspection.
(ii) 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.
