# AD 71-01-04: Toxic Fumes from Battery

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-31 and PA-31-300
- Effective: January 14, 1971
- Published: January 13, 1971
- Issued: December 23, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1139
- Registered aircraft: 29 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/84DF6894C2562B088625699700583111.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/71-01-04

## The airworthiness directive

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.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20SO](https://openairdocs.org/tcds/A20SO): Piper Aircraft Inc.; names 2 of 4 models: PA-31, PA-31-300

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 29 (29 by airframe model, 0 by engine model)
- Makers: Piper 29

Models with the most aircraft:

- [Piper PA-31](https://openairdocs.org/model/piper-pa-31): 26 aircraft (airframe model)
- [Piper PA-31-300](https://openairdocs.org/model/piper-pa-31-300): 3 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/71-01-04/models.md
Every aircraft: https://openairdocs.org/ad/71-01-04/aircraft.md

Its text cites no advisory circulars or STCs.

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