# AD 75-21-04: Batteries

- Type: Airworthiness directive
- Status: Current
- Products: SOCATA MS 880B
- Effective: October 22, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2382
- Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0C403394BDD4433986256A56005C4381.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-21-04

## The airworthiness directive

75-21-04 MORANE SAULNIER (SOCATA): Amendment 39-2382. Applies to MS880B airplanes serial numbers 1724, 1725, and 1805 through 1893 certificated in all categories.

Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent possible battery relay wiring overheat that could result in fire, install a one ampere fuse in the battery relay circuit in accordance with paragraph III ("Description") of Socata Service Bulletin No. 96 GR24.09 dated January, 1972, or an FAA-approved equivalent.

This amendment becomes effective October 22, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7A14](https://openairdocs.org/tcds/7A14): Daher; names 1 of 13 models: MS 880B

## 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: 4 (4 by airframe model, 0 by engine model)
- Makers: Morane-Saulnier 3, S.O.C.A.T.A. 1

Models with the most aircraft:

- [Morane-Saulnier MS880B](https://openairdocs.org/model/morane-saulnier-ms880b): 3 aircraft (airframe model)
- [S.O.C.A.T.A. MS880B](https://openairdocs.org/model/s-o-c-a-t-a-ms880b): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/75-21-04/models.md
Every aircraft: https://openairdocs.org/ad/75-21-04/aircraft.md

Its text cites no advisory circulars or STCs.

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