# AD 75-08-05: Battery Disconnect

- Type: Airworthiness directive
- Status: Current
- Products: Twin Commander 690A
- Effective: April 5, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2158
- Registered aircraft: 56 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/498A1443C8A9981186256A38005DBC60.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-08-05

## The airworthiness directive

75-08-05 ROCKWELL INTERNATIONAL CORP., GENERAL AVIATION DIVISION: Amendment 39-2158. Applies to Model 690A airplanes, Serial Numbers 11100 through 11196, 11198 through 11215, 11219 through 11227, and 11231 through 11233.

Compliance required within the next 25 hours time in service after the effective date of this AD, unless already accomplished.

To assure correct battery disconnect, accomplish the following:

  (a) Check operation of the battery select switch in accordance with Rockwell International, General Aviation Division, Service Bulletin No. 149, dated February 20, 1975, or later approved revision or in accordance with an equivalent operational check approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration.

  (b) If the check indicates incorrect connection, interchange Wires P42B22 and P53B22.

This amendment becomes effective on April 5, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A4](https://openairdocs.org/tcds/2A4): Twin Commander Aircraft LLC; names 1 of 21 models: 690A

## 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: 56 (56 by airframe model, 0 by engine model)
- Makers: Rockwell International 34, Aero Commander 22

Models with the most aircraft:

- [Rockwell International 690A](https://openairdocs.org/model/rockwell-international-690a): 34 aircraft (airframe model)
- [Aero Commander 690A](https://openairdocs.org/model/aero-commander-690a): 22 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/75-08-05/models.md
Every aircraft: https://openairdocs.org/ad/75-08-05/aircraft.md

Its text cites no advisory circulars or STCs.

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