71-01-04 PIPER AIRCRAFT: Amdt. 39-1139. Applies to Model PA-31 and PA-31-300 S/Nos 31-2 to 31-591.
Compliance required within the next 100 hours time in service after the effective date of this AD, unless already accomplished.
To prevent the hazards associated with toxic fumes from the battery being drawn into the cabin, accomplish the following:
(a) Relocate the battery drain in accordance with Piper Service Bulletin No. 325 dated November 10, 1970 or equivalent method approved by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.
This amendment is effective January 14, 1971.