48-34-01 BEECH: Applies to All Models AT-11, C18S Airplanes Which Have Been Modified in Accordance With Beech Service Bulletin D18-48 Referred to in AD 47-33-5 and All D18C, D18S and D18C-T Airplanes Which Have Been Modified in Accordance With Beech Service Bulletin D18C-3 Referred to in AD 47-33-06.
Inspection required at next periodic inspection.
Inspect the NAS 144 bolts, (identified by the stamped bolt head), installed in the revised stabilizer attachment fittings to determine that the depth of the outer dimension of the bolt head conforms to the acceptable limit of 0.226 inch plus or minus 0.010 inch. Bolts that do not meet this specification are under strength and must be replaced. Inspect the fuselage to stabilizer attachment fitting, P/N 437-186096, to determine that this fitting has not cracked where the lower 1/4-inch rivet attaches the fitting to the fuselage.
(Beech Service Bulletin No. D18-51 covers this same subject.)