47-33-07 BEECH: (Was Mandatory Note 2 of AD-770-1 and Mandatory Note 3 of AD- 765-1.) Applies to D18S, D18C and D18C-T Airplanes With Static Alternate Source Selector Valve.
Compliance required prior to October 15, 1947.
The present alternate static source does not comply with the Civil Air Regulations. The static selector valve should be removed and the AN 6270-4-22 flexible hose connected to the Beech 407-184756 static pressure tube by means of an 815-4D union.
(Beech Service Bulletin D18-47 covers this same subject.)