AD 78-26-06

78-26-06 PIPER: Amendment 39-3378. Applies to Model PA-38-112, Serial Numbers 38-78A0001 thru 38-78A0652, 38-78A0653, 38-78A0655, 38-78A0656, 38-78A0658, 38- 78A0660, 38-78A0661, 38-78A0664 thru 38-78A0672, 38-78A0674, 38-78A0676, 38-78A0677, 38-78A0680 thru 38-78A0682, 38-78A0686, 38-78A0690, 38-78A0693, 38-78A0701, 38-78A0702, 38-78A0708, 38-78A0711, 38-78A0717, 38-78A0723, 38-78A0729, 38-78A0734 and 38-78A0749 certificated in all categories.

To avoid possible hazards in flight associated with a crack in the vertical fin forward spar attachment plate accomplish the following within the next five hours in service unless previously accomplished.

a. Remove the dorsal fin fairing P/N 77607-02 and inspect the forward bend radius of the vertical fin forward spar attachment plate P/N 77553-5 for cracks using a dye penetrant inspection method.

b. If a cracked plate is found, replace with an undamaged part of the same part number before further flight, except a ferry flight to a place of repair may be authorized in accordance with FAR 21.197 with prior approval of the Chief, Engineering & Manufacturing Branch, FAA, Eastern Region.

(Piper Service Bulletin No. 628A refers to this same subject.)

This amendment is effective December 26, 1978.