76-11-04 DORNIER GmbH: Amendment 39-2631. Applies to Model Do 28D-1 airplanes certificated in all categories, serial numbers 4001 through 4039.
Compliance is required as indicated, unless already accomplished.
To prevent smoke and fire resulting from the chafing of teleflex engine control cables against electrical cables, accomplish the following:
(a) Within the next 10 hours time in service after the effective date of this AD, visually inspect the electrical cable insulation under each engine for chafing damage at those points where the throttle and mixture control teleflex cables cross the electrical cables. Actuate the teleflex dables during the inspection. If a chafed electrical cable is found, repair the cable in accordance with paragraph (c) of this AD before further flight.
(b) Within the next 100 hours time in service after the effective date of this AD, unless earlier compliance is required pursuant to paragraph (a) of this AD, comply with paragraph (c) of this AD.
(c) Wrap helical Rapidon wear protection material, or FAA-approved equivalent material, around the electrical cables and teleflex cables under each engine in accordance with Dornier Service Bulletin 1031-1901, dated March 25, 1971, or an FAA approved equivalent.
This amendment becomes effective June 15, 1976.