77-14-18 SIAI-MARCHETTI: Amendment 39-2968. Applies to F.260 and F.260B airplanes, Serial Numbers 101 thru 125, 2-26 thru 2-61, 3-76, 3-77, 3-78, 3-80, 3-84, 502, 10-09, and 20-01, certificated in all categories.
Compliance is required as indicated, unless already accomplished.
To prevent structural failure and possible loss of airplane control due to fatigue cracks surrounding the control surface hinge bracket attachment holes, accomplish the following:
(a) Comply with paragraph (c) of this AD in accordance with the following schedule:
(1) For airplanes with 1000 or less hours time in service on the effective date of this AD, within the next 25 hours time in service unless accomplished within the past 475 hours time in service, and thereafter in accordance with subparagraph (3) of this paragraph.
(2) For airplanes with more than 1000 hours time in service on the effective date of this AD, within the next 10 hours time in service, unless accomplished within the past 190 hours time in service, and thereafter in accordance with subparagraph (3) of this paragraph.
(3) Continue to comply with paragraph (c) of this AD at intervals not to exceed 500 hours time in service until reaching 1000 hours total time in service and thereafter at intervals not to exceed 200 hours time in service.
(b) The inspections required by paragraph (c) of this AD may be terminated -
(1) With respect to individual affected areas upon compliance with paragraph (d) of this AD; or
(2) Upon accomplishment of paragraph (e) of this AD.
(c) Inspect the areas surrounding the control surfaces hinge bracket attachment holes for cracks using dye penetrant in accordance with -
(1) SIAI Marchetti Mandatory Service Bulletins listed in paragraph (f) of this AD;
(2) SIAI Marchetti Mandatory Service Bulletin S.B. No. 260B16 dated April 2, 1976; or
(3) An FAA-approved equivalent of bulletins specified in paragraph (c)(1) and (c)(2) of this AD.
(d) If a crack is found during the inspection required by paragraph (c) of this AD, before further flight, modify and repair the affected area in accordance with appropriate SIAI Marchetti Mandatory Service Bulletin listed in paragraph (f) of this AD, or an FAA-approved equivalent.
(e) For areas where no cracks are found as a result of any inspection required by this AD, within the next 1,000 hours time in service after the effective date of this AD, perform the modifications and repairs specified in the SIAI Marchetti Mandatory Service Bulletins listed in paragraph (f) of this (AD), or FAA- approved equivalents.
(f) The applicable areas and Service Bulletins are as follows:
Affected Area
Applicable Service Bulletin
(1)
Wing Rear Spar in the Flaps and Aileron Hinge Bracket Area
S.B. 260B21
dated September 24, 1976.
(2)
Flaps Hinge Bracket Attachment Area
S.B. 260B22
dated September 24, 1976.
(3)
Aileron Hinge Bracket Attachment Area
S.B. 260B23
dated September 24, 1976.
(4)
Horizontal Stabilizer (Empennage) Rear Spar Hinge Bracket Attachment Area
S.B. 260B24
dated September 24, 1976.
(5)
Rudder Spar Upper Hinge Bracket Attachment Area
S.B. 260B25
dated September 24, 1976.
(6)
Elevator Outboard Hinge Bracket Attachment Area
S.B. 260B26
dated September 24, 1976.
(7)
Horizontal Stabilizer Outboard Hinge Bracket Attachment Area
S.B. 260B27
dated September 24, 1976.
This amendment becomes effective July 28, 1977.