# AD 71-20-07: Landing Gear Selector Lever Switch

- Type: Airworthiness directive
- Status: Current
- Products: Airbus BAC 1-11 200 Series and BAC 1-11 400 Series
- Effective: October 22, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1298
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F8EAC103D6A7F893862569A40066C874.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-20-07

## The airworthiness directive

71-20-07 BRITISH AIRCRAFT CORPORATION: Amendment 39-1298. Applies to British Aircraft Corporation Model BAC 1-11 200 and 400 series airplanes.

Compliance is required within the next 2,000 hours' time in service after the effective date of this AD, unless already accomplished.

To ensure that the pilot is warned when the landing gear selector lever is not fully engaged in a gated position, modify the selector lever assembly by incorporating a microswitch wired into the existing landing gear indication circuit in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 32-PM 4538, dated July 6, 1970, or an FAA- approved equivalent.

This amendment becomes effective October 22, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A5EU](https://openairdocs.org/tcds/A5EU): Airbus SAS; names 2 of 2 models: BAC 1-11 200 Series, BAC 1-11 400 Series

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.