65-06-06: Fuel Quantity Gauge Sender Units

65-06-06 PIPER: Amdt. 39-46 Part 39 Federal Register March 12, 1965. Applies to Model PA-28-140 Aircraft, Serial Numbers 20551 through 20672; Models PA-28-150, PA-28-160, PA-28-180 Aircraft Serial Numbers 1761 through 2183; and Model PA-28-235 Aircraft Serial Numbers 10003 through 10600. Compliance required as indicated. To prevent further failures of the fuel quantity gauge sender unit terminal connecting wire that could cause electrical arcing in the unit, accomplish the following: (a) Within the next 10 hours' time in service after the effective date of this AD, unless already accomplished, install a placard on the instrument panel adjacent to the fuel gauges that reads: "Do not operate aircraft with non-functioning or erratic fuel gauges". The placard may be removed when all fuel quantity gauge sender units have been modified in accordance with (b) or (c). (b) Before each flight after the placard has been installed, inspect to determine whether the aircraft has non-functioning or erratic fuel gauges. Modify the fuel quantity gauge sender unit, Piper P/N 550613, for any non-functioning or erratic gauge in accordance with Piper Service Bulletin No. 223 or later FAA-approved revision, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region, before further flight, except that the aircraft may be flown in accordance with the provisions of FAR 21.197 to a base where the modification can be made. During this flight the electrical lead to the sender unit to be modified shall be disconnected. The inspections required by this paragraph may be discontinued for the gauge of any sender unit modified in accordance with this paragraph. (c) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, modify all fuel quantity gauge sender units, Piper P/N 550613, in accordance with Piper Service Bulletin No. 223 or later FAA-approved revision, or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region. (Piper Service Bulletin No. 223, covers this subject.) This directive effective March 12, 1965.